CN114848123B - Bone screw and knotting-free bone-knitting system - Google Patents

Abstract

The application discloses a bone screw and a knotting-free bone system, aiming at solving the problems that the guiding precision is poor, the fracture part often has soft tissue injury, and the existing bone screw cannot be fixed and repaired; the bone screw comprises a hollow main body and a core rod arranged in the hollow main body; the hollow body comprises a first chamber and a second chamber which are communicated; the core rod comprises a first acting section matched with the first cavity and a second acting section matched with the second cavity; the hollow main body is arranged, implantation can be carried out along the positioning needle, the damaged part can be accurately fixed, the guiding precision is high, and damage to the fracture area is effectively reduced; the application can provide pressure between different areas of the bone, so that a plurality of areas are easy to heal; the hollow main body has good plastic performance and semi-transmission performance, does not need to be detached during clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

Description

Bone screw and knotting-free bone-knitting system

Technical Field

The application relates to the technical field of medical equipment, in particular to a bone screw and knotting-free bone system.

Background

In a medical bone injury department, patients with common fracture, fracture with cartilage avulsion and fracture with soft tissue avulsion injury have open operation or operation by means of an X-ray instrument, and the common techniques for treating the bone injury comprise a bone screw (made of titanium alloy) and a bone fracture plate (made of titanium alloy). Common techniques for treating soft tissue injuries include suture anchors and interface screws.

The following problems mainly exist at present: the open operation has large injury to the wound of the lesion, the probability of infection and inflammation is increased, the later recovery period is prolonged, and the body surface scars are not easy to remove after recovery, thereby affecting the beautiful appearance. Fracture patients are treated by using bone screws (made of titanium alloy) and bone plates (made of titanium alloy), wherein the bone screws and the bone plates are arranged between bone surfaces and soft tissues, and the friction between the bone screws and the bone plates and the soft tissues can cause inflammation or pathological changes. The bone screw and the bone plate are taken out after the injury is recovered, if the bone screw and the bone plate are not taken out, the bone rod area is protected from the gravity or external force of the human body and the bone rod area loses the function. Most of patients with bone and cartilage injuries and bone and soft tissue injuries in the fracture process need bone screws, bone plates, suture anchors and interface screws for treatment, and the cost of a plurality of types of implanted products is high. When the X-ray assisted surgery is used, firstly, a tiny positioning needle is roughly positioned according to the experience of a doctor, when the positioning can be confirmed by the aid of the X-ray assistance, the positioning needle is withdrawn, and then the bone screw is implanted.

In conclusion, the bone-knitting device disclosed at present is easy to cause secondary damage to patients due to poor guidance quality in the using process; when fixing and modifying, often need implant multiple product just can satisfy the fixed demand, and is with high costs, also can aggravate patient's misery.

Disclosure of Invention

Poor, the fracture department of direction precision often can have soft tissue injury when solving the coaptation, and present coaptation nail can't fix and prosthetic problem, this application provides a coaptation screw, exempts from to tie a knot coaptation system.

The bone screw provided by the first aspect of the application adopts the following technical scheme:

a bone screw comprises a hollow main body and a core rod arranged in the hollow main body;

the hollow body comprises a first chamber and a second chamber which are communicated;

the core rod comprises a first acting section matched with the first cavity and a second acting section matched with the second cavity;

the first action section is arranged in a manner of overhanging out of the first cavity;

the second acting section is arranged on one side of the first acting section, which is far away from the head part of the hollow main body.

By adopting the technical scheme, in the using process, the hollow main body can be accurately guided and implanted in a bone marrow channel along the positioning needle, so that the peripheral injury part can be accurately fixed; after the hollow main body reaches the preset position, implanting the core rod, and providing pressure between different areas of the bone through matching the corresponding areas of the hollow main body in the core rod implanting process so as to enable the areas to be easy to heal; the hollow body in this application, which does not need to be removed for clinical examination and diagnosis, significantly improves the visualization of the bone and joint space.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second action section is a polish rod;

the outer wall of the hollow main body is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section;

a through hole and a longitudinal groove communicated with the through hole are formed in the side wall of the second thread section; the longitudinal axis of the longitudinal groove is arranged in parallel with the longitudinal axis of the hollow body, and the depth of the longitudinal groove is smaller than the length of the through hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the fracture healing effect; the through hole and the longitudinal groove are arranged to form a threading structure, so that the sewing is facilitated.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second acting section is a polish rod;

the outer wall of the hollow main body is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section;

the plane of the tail end of the hollow main body is provided with a wire ring for the penetration of a suture.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the first thread section and the second thread section can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the thread ring forms a threading structure, which is convenient for sewing.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second action section is a polish rod;

the outer wall of the hollow main body is provided with a double-thread section and a columnar polished rod section, and the length of the double-thread section is greater than that of the columnar polished rod section; the tail end of the columnar polished rod section is sleeved with a pressure pad, and a plurality of threading holes are formed in the pressure pad; an interface pressing cap is arranged at the end part, far away from the double-thread section, of the columnar polished rod section.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the double-thread section and the columnar polished rod section are arranged, so that not only can the stabilization with surrounding bones be realized, but also a gap can be formed with the surrounding bones, the micro movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is greater than the longitudinal length of the second chamber; the first chamber is a conical chamber; the interior of the second chamber has internal threads;

the first action section is of a conical polished rod structure; the second action section is a threaded rod;

a driving structure is arranged at the end part, far away from the first action section, of the second action section, and a plurality of line holes are formed in the driving structure;

the outer wall of the hollow main body is provided with a plurality of coaxially arranged second circular truncated cone structures, and the bottom surfaces of the second circular truncated cone structures are all arranged towards the tail of the hollow main body;

the head of the hollow main body is provided with a plurality of side wall penetrating grooves;

the head of the hollow main body is conical.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the plurality of second circular truncated cone structures can realize the stabilization with surrounding bones and form gaps with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of a plurality of threading holes forms a threading structure, which is convenient for sewing.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second acting section is a polish rod;

the second action section is provided with a middle section threading hole, and a conical wire clamping groove is formed between the middle section threading hole and the tail part of the second action section;

the outer wall of the hollow main body is provided with a double-thread section, a blank section and a single-thread conical thread section, and the length of the double-thread section is greater than that of the single-thread conical thread section; the blank section is arranged between the double-thread threaded section and the single-thread tapered threaded section; the end part of the double-thread section far away from the blank section is a conical screw head.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-thread section, the blank section and the single-thread conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the setting of middle section through wires hole realizes fixing to the suture in the installation of core bar, and the steadiness is high, is convenient for sew up.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section and the second action section are both hexagonal polished rods;

the end part of the first action section is provided with a U-shaped groove;

the second action section is provided with a suture hole;

the outer wall of the hollow main body is provided with a double-thread threaded section, a blank section and a single-thread tapered threaded section, and the length of the double-thread threaded section is greater than that of the single-thread tapered threaded section; the blank section is arranged between the double-thread threaded section and the single-thread tapered threaded section; the end part of the double-thread section, which is far away from the blank section, is a conical screw head;

the side wall of the single-thread conical threaded section is provided with a threading hole;

a wire releasing groove is formed between the side wall of the single-wire conical thread section and the inner cavity, and the wire releasing groove is communicated with the wire threading hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-line thread section, the blank section and the single-line conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the setting of U type groove, suture hole and through wires hole realizes the fixed to the suture in the installation of core bar, and the steadiness is high, is convenient for sew up.

Preferably, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber; the longitudinal length of the first chamber is less than the longitudinal length of the second chamber;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second acting section is a polish rod;

the second action section is provided with a middle threading hole;

the outer wall of the hollow main body is provided with a double-thread section, a blank section and a single-thread conical thread section, and the length of the double-thread section is greater than that of the single-thread conical thread section; the blank section is arranged between the double-thread threaded section and the single-thread tapered threaded section; the end part of the double-thread section far away from the blank section is a conical screw head;

the side wall of the single-thread conical thread section is provided with a thread hole;

a wire placing groove is formed between the side wall of the single-wire conical thread section and the inner cavity, and the wire placing groove is communicated with the wire passing hole.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the double-thread section, the blank section and the single-thread conical thread section can realize the stabilization with the surrounding bone and form a gap with the surrounding bone, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of first circular truncated cone structures realizes the stable connection of the hollow main body; the setting of U type groove, suture hole and through wires hole realizes fixing the suture in the core bar installation, and the steadiness is high, is convenient for sew up.

Preferably, the hollow body comprises a first formation and a second formation, the end of the first formation having an annular projection; the end part of the second structure is provided with an annular groove clamped with the annular bulge so as to be connected with the first structure; the first structure has a degree of freedom to rotate along its longitudinal axis or the second structure has a degree of freedom to rotate along its longitudinal axis;

the outer wall of the first structure is provided with external threads, and the end part of the first structure far away from the second structure is arranged in a conical shape;

the second structure comprises a polished rod section and a threaded section, and the threaded section is arranged on one side, far away from the first structure, of the polished rod section; the thread pitch of the thread section is smaller than that of the external thread; a threading through hole is formed in the thread section;

the first structure is internally provided with a first channel section and a second channel section; the second structure has a third channel segment inside; the first channel section is the first chamber, and the second channel section and the third channel section form the second chamber;

the radial dimension of the first channel section is less than the radial dimension of the second channel section;

the radial dimension of the second channel section is consistent with the radial dimension of the third channel section;

the first action section is provided with a plurality of coaxially arranged first circular truncated cone structures, and the bottom surfaces of the first circular truncated cone structures are all arranged towards the second action section;

the second action section is a polish rod.

By adopting the technical scheme, accurate bone-knitting guiding can be realized; the arrangement of the external thread, the polished rod section and the thread section on the outer side of the first structure can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of first circular truncated cone structures and the polished rod realizes the stable connection of the hollow main body; the through holes are arranged, so that threading is facilitated, and the sewing effect is improved.

The knotting-free bone-knitting system provided by the second aspect of the application adopts the following technical scheme:

the knotting-free bone-knitting system comprises a plurality of bone-knitting screws, wherein the bone-knitting screws are connected with one another through sutures to form a knotting-free traction anchoring surface.

By adopting the technical scheme, knotting-free bone setting is realized, and anchoring pulling force is formed between the bone setting plates to ensure that the bone setting plates are more firmly fixed.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the application, the bone screw is not taken out after being implanted into a body, so that the friction with soft tissues is reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced.

2. In the bone screw disclosed by the application, the hollow main body can be implanted along the positioning needle, so that the damaged part can be accurately fixed, the guiding precision is high, and meanwhile, the damage to soft tissues on the peripheral side is greatly reduced; the matching arrangement of the core rod and the hollow main body provides pressure between different areas of the bone, so that a plurality of areas are easy to heal; the adopted polyetheretherketone or absorbable material has good plasticity capability and semi-transmission property of rays, does not need to be removed during clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

3. The scheme disclosed in the application can solve trauma orthopedics and sports injury integrated patients.

4. The present application is made of PEEK and titanium alloy materials, and the radiolucent translucent nature of the hollow body provides significant clinical advantages over traditional metal implants by significantly improving visualization of the bone and joint space. The surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film.

5. Simple structure, low cost and convenient popularization.

6. The scheme disclosed in the application is a structure with a thread, so that the thread can be conveniently threaded and the fracture area can be sutured.

7. The knotting-free bone-knitting system can realize tensioning and pressurizing of two fracture surfaces of a fractured bone, forms anchoring traction force between the two fracture surfaces to enable the fractured bone to be more firm to fix, is beneficial to healing of the bone, and effectively reduces pain of patients.

Drawings

Fig. 1 is a schematic view of a first embodiment of a bone screw according to the present application.

Fig. 2 is a schematic cross-sectional view of the hollow body of fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 4 is a schematic structural view of a second embodiment of the hollow body in the bone screw of fig. 1.

Fig. 5 is a schematic view of a third embodiment of the hollow body in the bone screw of fig. 1.

Fig. 6 is a schematic structural view of a fourth embodiment of the hollow body in the bone screw of fig. 1.

Fig. 7 is a schematic cross-sectional view of fig. 6.

Fig. 8 is a schematic structural view of a fifth embodiment of the hollow body in the bone screw of fig. 1.

Fig. 9 is a schematic structural view of a sixth embodiment of a bone screw according to the present application.

Fig. 10 is a schematic cross-sectional view of the hollow body of fig. 9.

Fig. 11 is a schematic structural view of a seventh embodiment of a bone screw according to the present application.

Fig. 12 is a schematic structural view of an eighth embodiment of a bone screw according to the present application.

Fig. 13 is a schematic structural view of a ninth embodiment of a bone screw according to the present application.

Fig. 14 is a schematic structural view of a tenth embodiment of a bone screw according to the present application.

Fig. 15 is a schematic structural view of an eleventh embodiment of a bone screw according to the present application.

Fig. 16 is a schematic view of a twelfth embodiment of a bone screw according to the present application.

Fig. 17 is a schematic view of a thirteenth embodiment of the hollow body in the bone screw of fig. 1.

Fig. 18 is a schematic sectional view of fig. 17.

Description of the reference numerals: 100. a hollow body; 101. a first structure; 1011. an annular projection; 1012. a first channel segment; 1013. a second channel segment; 102. a second structure; 1021. an annular groove; 1022. a third channel segment; 110. a first chamber; 120. a second chamber; 131. a first thread segment; 132. a second thread segment; 1321. a through hole; 1322. a longitudinal groove; 1323. a counter bore; 140. a wire loop; 151. a double-threaded section; 152. a cylindrical polished rod section; 153. a pressure pad; 154. pressing a cap on the interface; 161. a double-threaded segment; 162. a blank section; 163. a single tapered threaded section; 200. a core bar; 210. a first action section; 211. a U-shaped groove; 212. a boss structure; 220. a second action section; 221. a middle section threading hole; 222. a conical wire clamping groove; 230. a drive structure; 300. a first truncated cone structure; 400. a second truncated cone structure; 500. hexagonal connecting piece.

Detailed Description

The present application is described in further detail below with reference to fig. 1-18.

The application discloses a bone screw, exempt from coaptation system of knoing.

Example one

Referring to fig. 1 and 2, a first aspect of the present application discloses a bone screw comprising a hollow body 100, the interior of the hollow body 100 having a first chamber 110 and a second chamber 120 communicating with each other; the hollow body 100 is made of polymer material, preferably polyetheretherketone or absorbable material, which will not harm human body and significantly improve the visualization of bone and joint space. The hollow body 100 provides a significant clinical advantage over conventional metal implants, and the surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film. The adopted polyetheretherketone or absorbable material has good plasticity capability and semi-transmission property of rays, does not need to be removed during clinical examination and diagnosis, and obviously improves the visualization of bones and joint spaces.

The bone screw further comprises a core rod 200 arranged in the hollow main body 100, wherein the core rod 200 comprises a first acting section 210 matched with the first cavity 110 and a second acting section 220 matched with the second cavity 120; the first active segment 210 is disposed in overhanging relation to the first chamber 110; the second active segment 220 is disposed on a side of the first active segment 210 away from the head of the hollow body 100.

The bone screw is embedded, the hollow main body 100 and the core rod 200 do not need to be taken out, namely, the bone screw is not taken out after being implanted in a body; through the implanted arrangement, the friction with soft tissues is effectively reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced; particularly, the probability of infection and inflammation of the lesion wound which is greatly injured by open surgery is effectively reduced, the later recovery period is shortened, the body surface scars are easy to remove after recovery, and the appearance is attractive. The bone screw disclosed by the application can meet treatment expectations such as fixation and the like, effectively reduces the types of implanted products, can reduce the pain of patients, and can also reduce the economic burden of the patients.

In the using process, the hollow main body can be accurately guided and implanted in a bone marrow channel along the positioning needle, so that the peripheral injury part can be accurately fixed; after the hollow main body reaches the preset position, the core rod is implanted, specifically, the first action section 210 is arranged in a matching mode with the first cavity 110, the second action section 220 is arranged in a matching mode with the second cavity 120, the whole bone screw can be accurately implanted, the core rod 200 can be accurately positioned inside the hollow main body 100 through arrangement of the corresponding cavities, pressure is provided for different regions on the peripheral side through the hollow main body 100, and therefore the regions are easy to heal. The hollow body of the present application has good plastic capability and semi-transmission of rays, does not need to be removed in clinical examination and diagnosis, and significantly improves visualization of bone and joint space, wherein the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120, facilitating installation of the core pin 200 while improving stability.

The outer wall of the hollow main body 100 is provided with a first thread section 131 and a second thread section 132, the length of the first thread section 131 is greater than that of the second thread section 132, and the thread pitch of the first thread section 131 is greater than that of the second thread section 132, that is, the stroke of the distal part of the tail is greater than that of the proximal part of the head, and the proximal part is driven by the integral distal part providing pressure, so that the compression effect is improved.

A through hole 1321 and a longitudinal groove 1322 communicated with the through hole 1321 are formed in the side wall of the second thread section 132; the longitudinal groove 1322 has a longitudinal axis disposed in parallel with the longitudinal axis of the hollow body 100, and the depth of the longitudinal groove 1322 is smaller than the length of the through hole 1321, facilitating the penetration of a suture.

It should be noted that the longitudinal axis of the longitudinal slot 1322 and the longitudinal axis of the hollow main body 100 may be disposed at a predetermined included angle, as long as the requirement of threading the suture thread is satisfied.

Wherein the second active segment 220 is a smooth rod in the shape of a hexagonal prism for facilitating connection with an external structure for providing a driving force.

Further referring to fig. 3, the first acting section 210 has a plurality of first cone structures 300 coaxially disposed, bottom surfaces of the plurality of first cone structures 300 are all disposed toward the second acting section 220, so as to be conveniently installed with the hollow main body 100, and the hollow main body is firmly fixed and is not easily pulled out, and when the first acting section 210 is inserted into the first chamber 110, the first acting section will be tightly attached to an inner wall of the first chamber 110, so as to increase friction force and prevent reverse looseness.

The implementation principle of the bone screw in the embodiment of the application is as follows: the embodiment can be implanted along the positioning needle, so that accurate bone setting guiding is realized; the arrangement of the first thread section 131 and the second thread section 132 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thus being beneficial to the micro movement of bone healing and improving the fracture healing effect; the through hole 1321 and the longitudinal groove 1322 form a threading structure, thereby facilitating the sewing.

In a preferred embodiment of the present application, the through holes 1321 are provided in two, and the two through holes 1321 are symmetrically provided; the longitudinal slots 1322 are adapted to receive sutures extending through the through holes 1321, which not only secure the sutures, but also prevent damage to the bone surrounding the bone within the established bone tunnel.

Example two

Referring to fig. 4, the core bar 200 provided inside the hollow main body 100 in this embodiment is structurally identical to the core bar 200 provided in the first embodiment, and thus only the hollow main body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a first threaded section 131 and a second threaded section 132, the length of the first threaded section 131 is greater than that of the second threaded section 132, and the thread pitch of the first threaded section 131 is greater than that of the second threaded section 132; the plane of the tail end of the hollow main body 100 is provided with a wire ring 140 for the penetration of a suture, and the embodiment can realize accurate bone-knitting guiding; the arrangement of the first thread section 131 and the second thread section 132 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thus being beneficial to the micro movement of bone healing and improving the fracture healing effect; the thread loop 140 is provided to form a threading structure for facilitating suturing.

Preferably, the wire loop 140 is provided integrally with the hollow body 100, i.e. injection molded in one piece.

Preferably, one wire loop 140 is provided, and the wire loop 140 is a semicircular loop.

EXAMPLE III

Referring to fig. 5, in the second embodiment, different from the second embodiment, two wire loops 140 are provided, and the two wire loops 140 are symmetrically provided; it should be noted that the number of the thread loops 140 can be flexibly set according to the requirement to meet the requirement of the suture.

Example four

Referring to fig. 6 and 7, the core bar 200 provided inside the hollow body 100 in this embodiment is structurally identical to the core bar 200 provided in the first embodiment, and thus only the hollow body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a first thread section 131 and a second thread section 132, the length of the first thread section 131 is greater than that of the second thread section 132, and the thread pitch of the first thread section 131 is greater than that of the second thread section 132; a through hole 1321 is formed in the side wall of the second thread segment 132; a counter bore 1323 is formed between the side wall of the second thread section 132 and the inner cavity, the counter bore 1323 is communicated with the through hole 1321, and the through hole 1321 and the counter bore 1323 are arranged; in the using process, the suture can pass through the arrangement of the through hole 1321 and the counter bore 1323, the connection with the hollow main body 100 is ensured, and the fixing strength of the suture is improved; further, with the threading structure disclosed in the present embodiment, the suture does not generate friction against the surrounding bone when the hollow body 100 is installed, preventing secondary damage to the surrounding bone, and at the same time facilitating the suturing.

EXAMPLE five

Referring to fig. 8, the core bar 200 provided inside the hollow main body 100 in this embodiment is structurally identical to the core bar 200 provided in the first embodiment, and thus only the hollow main body 100 in this embodiment will be described in detail.

The outer wall of the hollow main body 100 is provided with a double-thread section 151 and a columnar polished rod section 152, and the length of the double-thread section 151 is greater than that of the columnar polished rod section 152; the tail end of the columnar polished rod section 152 is sleeved with a pressure pad 153, and a plurality of threading holes are formed in the pressure pad 153; the end of the cylindrical polished rod section 152 remote from the double-threaded section 151 is provided with an interface pressure cap 154; the implementation can realize accurate bone-knitting guiding; the dual-thread section 151 and the columnar polished rod section 152 are arranged, so that the gasket acts on the surface of a cortical bone and the surface of a soft tissue, the fracture is pressed and fixed, the surface of the soft tissue is pressed and fixed, the micro-movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of a plurality of threading holes forms a threading structure, which is convenient for suturing soft tissues for suturing, fixing and resetting.

EXAMPLE six

With reference to fig. 9 and 10, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is greater than the longitudinal length of the second chamber 120; the first chamber 110 is a conical chamber; the interior of the second chamber 120 is internally threaded, specifically, with a threaded section that mates with the second reaction section 220.

Wherein, the first action section 210 is a tapered polish rod structure, which is convenient for installation; the second active segment 220 is a threaded rod ensuring the fixation with the hollow body 100.

The end of the second action section 220 away from the first action section 210 is provided with a driving structure 230, and the driving structure 230 is provided with a plurality of thread holes to perform secondary fixing and guiding functions on the threaded thread.

The outer wall of hollow main part 100 has the second round platform structure 400 of a plurality of coaxial settings, and the bottom surface of a plurality of second round platform structures 400 all sets up towards the afterbody of hollow main part 100, not only is convenient for wear to establish in the bone tunnel, can form reverse conflict with bone on every side again, prevents reverse pine and takes off.

The head of the hollow main body 100 is provided with a plurality of side wall through grooves for facilitating the threading of the suture.

The head of the hollow main body 100 is conical, so that the introduction and the guide penetration are convenient, and the accurate guidance of the bone fracture can be realized; the arrangement of the plurality of second circular truncated cone structures 400 can not only realize the stabilization with the surrounding bone, but also form a gap with the surrounding bone, thereby facilitating the micro-movement of bone healing and improving the fracture healing effect; the arrangement of a plurality of threading holes forms a threading structure, and is convenient for sewing.

Preferably, a plurality of side walls are arranged in an array relative to the longitudinal axis of the hollow body 100 through the slots.

EXAMPLE seven

Referring to fig. 11, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The head of the first active segment 210 is tapered; the outer side of the first acting section 210 is provided with a plurality of first circular truncated cone structures 300 which are coaxially arranged, the bottom surfaces of the first circular truncated cone structures 300 are all arranged towards the second acting section 220, so that the hollow main body 100 can be conveniently installed, the fixing is firm, the pulling-out is not easy, and the reverse looseness is prevented.

The second active segment 220 is a polish rod; the second acting section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second acting section 220, so that a suture can be conveniently threaded.

The end of the second acting section 220 far away from the first acting section 210 is provided with a countersunk threaded hole for connecting with the hexagonal connector 500, so as to control the connection of the core rod 200 and the hollow main body 100.

Further, the tail of the second acting section 220 is a conical structure, and a chamfered structure is further arranged outside the second acting section, so that the compression effect on the hollow main body 100 is improved.

The outer wall of the hollow main body 100 is provided with a double-thread threaded section 161, a blank section 162 and a single-thread tapered threaded section 163, and the length of the double-thread threaded section 161 is greater than that of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end part of the double-thread section 161 far away from the blank section 162 is a conical screw head; the arrangement of the double-thread threaded section 161, the blank section 162 and the single-thread tapered threaded section 163 can realize the stabilization with surrounding bones, can form a gap with the surrounding bones, is beneficial to the micro movement of bone healing and improves the fracture healing effect; the arrangement of middle section threading hole 221 realizes fixing of suture in the installation of core bar 200, and the steadiness is high, is convenient for sew up.

Preferably, the core rod 200 is made of titanium alloy material, so as to improve the bearing strength.

Example eight

Referring to fig. 12, the present embodiment is configured in the same manner as the hollow body 100 of the seventh embodiment, and only the core bar 200 will be described in detail.

The head of the first active segment 210 is tapered; the outside of first effect section 210 has a plurality of coaxial first round platform structures 300 that set up, and the bottom surface of a plurality of first round platform structures 300 all sets up towards second effect section 220, is convenient for with hollow main body 100's installation, makes its fixed firm difficult pull out, prevents reverse not hard up.

The second active segment 220 is a polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second action section 220, so that a suture can be conveniently threaded; the tail of the second active segment 220 is in a hexagonal prism shape.

Example nine

Referring to fig. 13, the outer wall of the hollow main body 100 is provided with a threaded section and a blank section 162, and the blank section 162 is provided at the tail of the threaded section; the head of the thread section is arranged in a conical shape.

The head of the first active segment 210 is tapered; the outer side of the first acting section 210 is provided with a plurality of first circular truncated cone structures 300 which are coaxially arranged, the bottom surfaces of the first circular truncated cone structures 300 are all arranged towards the second acting section 220, so that the hollow main body 100 can be conveniently installed, the fixing is firm, the pulling-out is not easy, and the reverse looseness is prevented.

The second active segment 220 is a polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail of the second action section 220, so that a suture can be conveniently threaded; the tail of the second acting section 220 is a hexagonal prism, and the outer side of the hexagonal prism is provided with a chamfering structure.

Example ten

Referring to fig. 14, in particular, the outer wall of the hollow body 100 is provided with a double-thread threaded section 161, a blank section 162, and a single-thread tapered threaded section 163, the length of the double-thread threaded section 161 being greater than the length of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end part of the double-thread section 161 far away from the blank section 162 is a conical screw head; the side wall of the single-thread tapered thread section 163 is provided with a thread hole.

The radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The first action section 210 and the second action section 220 are all hexagonal polished rods; wherein, the end of the first action section 210 is provided with a U-shaped groove 211; the second action section 220 is provided with a suture hole; the front end of the first active segment 210 is conically configured.

The embodiment can realize accurate bone-knitting guiding; the arrangement of the double-thread threaded section 161, the blank section 162 and the single-thread tapered threaded section 163 can realize the stabilization with surrounding bones, can form a gap with the surrounding bones, is beneficial to the micro movement of bone healing and improves the fracture healing effect; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core rod 200, the stability is high, and the sewing is facilitated.

Furthermore, a thread releasing groove can be further formed between the side wall of the single-thread tapered thread section 163 and the inner cavity, and the thread releasing groove is communicated with the thread releasing hole, so that the thread is hidden inside the hollow main body 100 and is not exposed to the outside, and secondary damage to surrounding bones is prevented.

Further, the core rod 200 is made of a titanium alloy material, so that the bearing strength is ensured.

EXAMPLE eleven

Referring to fig. 15, in particular, the outer wall of the hollow body 100 is provided with a double-thread threaded section 161, a blank section 162, and a single-thread tapered threaded section 163, the length of the double-thread threaded section 161 being greater than the length of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double-threaded segment 161 and the single-threaded tapered threaded segment 163; the end part of the double-thread section 161 far away from the blank section 162 is a conical screw head; the side wall of the single-thread tapered thread section 163 is provided with a thread hole; a wire laying groove is formed between the side wall of the single-wire conical thread section 163 and the inner cavity and communicated with the wire threading hole.

The radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The first action section 210 is provided with a plurality of coaxially arranged first circular truncated cone structures 300, and the bottom surfaces of the plurality of first circular truncated cone structures 300 are all arranged towards the second action section 220; the second active segment 220 is a tapered polish rod; the second action section 220 is provided with a middle threading hole 221 and is penetrated with the suture.

The embodiment can realize accurate bone setting guiding; the double-line thread section 161, the blank section 162 and the single-line conical thread section 163 are arranged, so that not only can the stabilization of the bone around be realized, but also a gap can be formed between the bone and the surrounding bone, the micro-movement of bone healing is facilitated, and the fracture healing effect is improved; the arrangement of the plurality of first truncated cone structures 300 realizes the stable connection to the hollow main body 100; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core rod 200, the stability is high, and the sewing is facilitated.

Example twelve

Referring to fig. 16, in particular, the radial dimension of the first chamber 110 is smaller than the radial dimension of the second chamber 120; the longitudinal length of the first chamber 110 is less than the longitudinal length of the second chamber 120.

The first active segment 210 has a plurality of coaxially disposed boss structures 212.

The second action section 220 is a hexagonal polish rod; the second action section 220 is provided with a middle threading hole 221, and a conical wire clamping groove 222 is formed between the middle threading hole 221 and the tail end of the second action section 220.

The outer wall of the hollow main body 100 is provided with a double-thread threaded section 161, a blank section 162 and a single-thread tapered threaded section 163, and the length of the double-thread threaded section 161 is greater than that of the single-thread tapered threaded section 163; the blank segment 162 is disposed between the double thread segment 161 and the single thread tapered thread segment 163; the end of the double thread segment 161 remote from the blank segment 162 is a conical thread head.

Furthermore, the side wall of the single-thread conical thread section 163 can be provided with a threading hole; a wire arrangement groove is formed between the side wall of the single-wire conical thread section 163 and the inner cavity, and the wire arrangement groove is communicated with the wire through hole.

The embodiment can realize accurate bone setting guiding; the arrangement of the double-thread threaded section 161, the blank section 162 and the single-thread tapered threaded section 163 can realize the stabilization with surrounding bones, can form a gap with the surrounding bones, is beneficial to the micro movement of bone healing and improves the fracture healing effect; the boss structure 212 and the hexagonal polish rod are arranged to realize stable connection to the hollow main body 100; the U-shaped groove 211, the suture holes and the threading holes are arranged, so that the suture can be fixed in the installation of the core rod 200, the stability is high, and the sewing is facilitated.

EXAMPLE thirteen

Referring to fig. 17 and 18, in particular, the hollow body 100 comprises a first structure 101 and a second structure 102, the end of the first structure 101 having an annular projection 1011; the end of the second structure 102 has an annular groove 1021 engaged with the annular protrusion 1011 to connect with the first structure 101; the first structure 101 has the freedom to rotate along its longitudinal axis or the second structure 102 has the freedom to rotate along its longitudinal axis, i.e. the first structure 101 and the second structure 102 can be turned but not separated.

The outer wall of the first structure 101 has an external thread and the end of the first structure 101 remote from the second structure 102 is tapered.

The second structure 102 comprises a polished rod section and a threaded section, and the threaded section is arranged on one side, far away from the first structure 101, of the polished rod section; the thread pitch of the thread section is smaller than the thread pitch of the external thread. The interior of the first structure 101 has a first channel section 1012 and a second channel section 1013; the interior of the second structure 102 has a third channel segment 1022; the first channel section 1012 is the first chamber 110, and the second channel section 1013 and the third channel section 1022 form the second chamber 120.

Preferably, the radial dimension of the first channel section 1012 is smaller than the radial dimension of the second channel section 1013;

preferably, the radial dimension of the second channel segment 1013 is arranged in correspondence with the radial dimension of the third channel segment 1022;

preferably, the first acting section 210 has a plurality of coaxially arranged circular truncated cone structures, and bottom surfaces of the plurality of circular truncated cone structures are all arranged towards the second acting section 220.

The second active segment 220 is a polished rod.

The embodiment can realize accurate bone-knitting guiding; the arrangement of the external thread, the polished rod section and the thread section on the outer side of the first structure 101 can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the plurality of circular truncated cone structures and the polish rod realizes the stable connection to the hollow main body 100; the through holes are formed, so that the threading is facilitated, and the sewing effect is improved.

Preferably, the length of the polished rod segment is greater than the length of the threaded segment.

Preferably, the length of the threaded segment is less than the length of the external thread.

When the bone fracture setting operation is performed, a driving tool is inserted into the front end part of the screw to implant, the driving tool needs to be implanted into a position 3mm to 6mm below bone cortex when the bone fracture setting operation is performed, then the driving tool is pulled out of the rear end part of the screw to reversely rotate 3mm to 6mm, and the rear end of the screw is withdrawn to drive the front end of the screw to move backwards so as to pressurize a fracture part.

In the application, the bone screw is not taken out after being implanted into a body, so that the friction with soft tissues is reduced, and the occurrence probability of inflammation or pathological changes is greatly reduced.

According to the scheme disclosed by the application, the hollow main body 100 can be implanted along the positioning needle, the guiding precision is high, and the stabilizing effect is high.

Further, in the present application, the material of the core rod 200 may be any one of polyetheretherketone, HA, carbon fiber, or titanium alloy.

Further, the hollow body 100 in the present application is a see-through interface screw.

Specifically, the hollow body 100 may be based on an inner core of titanium alloy, with an outer layer of PEEK over-molded, with lower titanium loading enhanced by PEEK over-molding, while maintaining strength and providing clear bone visibility due to the radiolucency of PEEK. Self-tapping, self-drilling, the cannulated screw system accepts a larger diameter kirschner wire and has enhanced self-tapping, self-drilling cutting screw shearing, which effectively limits the kirschner wire from bending and reduces the displacement of fracture fragments, thereby allowing the surgeon to implant with ease.

When in use, firstly, the fracture type of the injury is determined, and a corresponding bone-knitting interface screw is selected to fix the injury; the bone is seen through by an X-ray machine to find out the position of the injury, a thinner metal positioning needle is used for drilling into the backbone, and then the X-ray machine is used for confirming whether the positioning needle is properly fixed; after the positioning needle is confirmed to be in a proper position, a tunnel is established on the bone rod along the positioning needle by utilizing a hollow open-circuit tool; after the tunnel is established, a special tool implantation tool is used for implanting the bone-knitting hollow interface screw along the positioning pin, namely the hollow main body 100 of the corresponding type in the application; after implantation, the tail end carries a suture and soft tissue suturing or re-anchoring with an anchor at the distal end of the shaft.

The scheme disclosed in the application can solve trauma orthopedics and sports injury integrated patients.

The radiolucent nature of the hollow body 100, made of PEEK and titanium alloy materials, provides significant clinical advantages over conventional metal implants by significantly improving visualization of the bone and joint space. The surgeon can better assess post-operative healing by "looking through" the implant and looking down on the bone structure on an X-ray film.

Furthermore, the bone screw has the advantages that the head tip design is simple and easy to implant, and the pre-drilling requirement is avoided.

Or the head of the bone screw is designed to be circular arc, so that sharp edge stabbing of the head of the bone screw is reduced, and irritation and damage to soft tissues are reduced.

Further, the sutures in the present application are preformed high strength sutures.

It should be noted that, the hollow main body 100 in the present application is used as a bone interface screw, has a certain load-bearing strength, and is convenient to screw in, and the screw has a stronger fixing effect in the bone tunnel due to the back-off effect generated by the thread of the thread section.

The second aspect of the application discloses a knot-free coaptation system, this system includes a plurality of coaptation screw, it is a plurality of through suture interconnect between the coaptation screw, form knot-free tractive anchoring face, realize knot-free coaptation, form anchor tractive force each other and make it fixed more firm.

The scheme disclosed by the application can realize tensioning and pressurizing of two fracture surfaces of the fractured bone, promote the healing of the bone, effectively relieve the pain of a patient and solve the problem of trauma, orthopedics and sports injury integrated patients.

Further, a third aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than the longitudinal length of the second chamber, so that internal guidance is facilitated, and stability is improved. The outer wall of the hollow bone-knitting interface screw is provided with a first thread section and a second thread section, the length of the first thread section is larger than that of the second thread section, the thread pitch of the first thread section is larger than that of the second thread section, namely, the stroke of the far side part is larger than that of the near side part, and the near side part is driven by the integrated far side part which provides pressure, so that the compression effect is improved.

The side wall of the second thread section is provided with a through hole and a longitudinal groove communicated with the through hole; the longitudinal axis of the longitudinal groove is parallel to the longitudinal axis of the hollow bone-knitting interface screw, and the depth of the longitudinal groove is smaller than the length of the through hole, so that the suture line can be conveniently threaded.

Further, a fourth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that the internal guidance is facilitated, and the stability is improved; the outer wall of the screw is provided with a first thread section and a second thread section, the length of the first thread section is greater than that of the second thread section, and the thread pitch of the first thread section is greater than that of the second thread section; the plane of the tail end of the bone setting rod is provided with a wire ring for the penetration of a suture line so as to realize accurate bone setting guiding; the arrangement of the first thread section and the second thread section can realize the stabilization with surrounding bones and form a gap with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of the thread ring forms a threading structure, which is convenient for sewing.

Further, a fifth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the screw rod is provided with a first screw thread section and a second screw thread section, the length of the first screw thread section is greater than that of the second screw thread section, and the screw pitch of the first screw thread section is greater than that of the second screw thread section; a through hole is formed in the side wall of the second thread section; a counter bore is formed between the side wall of the second thread section and the inner cavity, the counter bore is communicated with the through hole, and a threading structure is formed through the through hole and the counter bore, so that the fixing strength of a thread is improved; in addition, through the threading structure disclosed by the embodiment, when the hollow bone-knitting interface screw is installed, the suture does not generate friction on surrounding bones, secondary damage to the surrounding bones is prevented, and meanwhile, the suture is convenient.

Further, a sixth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the device is provided with a double-thread section and a columnar polished rod section, and the length of the double-thread section is greater than that of the columnar polished rod section; the tail end of the columnar polished rod section is sleeved with a pressure pad, and a plurality of threading holes are formed in the pressure pad; an interface pressing cap is arranged at the end part of the columnar polished rod section, which is far away from the double-thread section, and is used for being fixed with the second action section; the arrangement of the double-thread section and the columnar polished rod section realizes that the gasket acts on the surface of the cortical bone and the surface of the soft tissue to apply pressure to fix the fracture, and the surface of the soft tissue is fixed by pressure, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of a plurality of threading holes forms a threading structure, which is convenient for suturing soft tissues for suturing, fixing and resetting.

Further, a seventh aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; its outer wall has the second round platform structure of a plurality of coaxial settings, and the bottom surface of a plurality of second round platform structures all sets up towards the afterbody of hollow main part, not only is convenient for wear to establish in the bone tunnel, can form reverse conflict with surrounding bone again, prevents reverse pine from taking off. The head part is provided with a plurality of side wall penetrating grooves for facilitating the penetration of the suture.

Particularly, the head part of the bone fracture guide rod is conical, so that the bone fracture guide rod is convenient to guide and penetrate in a guiding manner, and accurate guiding of the bone fracture can be realized; the arrangement of the plurality of second circular truncated cone structures can realize the stabilization with surrounding bones and form gaps with the surrounding bones, thus being beneficial to the micro movement of bone healing and improving the effect of fracture healing; the arrangement of a plurality of threading holes forms a threading structure, which is convenient for sewing.

Further, an eighth aspect of the present application discloses a cannulated bone interface screw comprising a first chamber and a second chamber in communication, the first chamber having a radial dimension less than the radial dimension of the second chamber; the longitudinal length of the first chamber is smaller than that of the second chamber, so that internal guidance is facilitated, and stability is improved; the outer wall of the double-thread tapered thread section is provided with a double-thread threaded section, a blank section and a single-thread tapered thread section, and the length of the double-thread threaded section is greater than that of the single-thread tapered thread section; the blank section is arranged between the double-thread section and the single-thread tapered thread section; the end part of the double-thread section far away from the blank section is a conical screw head; the arrangement of the double-thread section, the blank section and the single-thread conical thread section can realize the stabilization of the bone around, and can form a gap with the bone around, thereby being beneficial to the micro movement of bone healing and improving the effect of fracture healing.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A bone screw, characterized by: comprises a hollow main body (100) and a core rod (200) arranged in the hollow main body (100);

the hollow body (100) comprises a first chamber (110) and a second chamber (120) in communication; the radial dimension of the first chamber (110) is smaller than the radial dimension of the second chamber (120); the longitudinal length of the first chamber (110) is less than the longitudinal length of the second chamber (120); the outer wall of the hollow main body (100) is provided with a thread section;

the core rod (200) comprises a first acting section (210) matched with the first cavity (110) and a second acting section (220) matched with the second cavity (120);

the first active segment (210) is arranged to overhang the first chamber (110);

the second acting section (220) is arranged on one side of the first acting section (210) far away from the head part of the hollow main body (100);

the first action section (210) is provided with a plurality of coaxially arranged first circular truncated cone structures (300), and the bottom surfaces of the first circular truncated cone structures (300) are all arranged towards the second action section (220); the second acting section (220) is a polish rod;

under the working state, the bone screw is arranged in an embedded mode and is not taken out after being implanted into the body.

2. The bone screw according to claim 1 wherein: a first thread section (131) and a second thread section (132) are arranged on the outer wall of the hollow main body (100), the length of the first thread section (131) is greater than that of the second thread section (132), and the thread pitch of the first thread section (131) is greater than that of the second thread section (132);

a through hole (1321) and a longitudinal groove (1322) communicated with the through hole (1321) are formed in the side wall of the second thread section (132); the depth of the longitudinal groove (1322) is smaller than the length of the through hole (1321).

3. The bone screw according to claim 1 wherein: the outer wall of the hollow main body (100) is provided with a first threaded section (131) and a second threaded section (132), the length of the first threaded section (131) is larger than that of the second threaded section (132), and the thread pitch of the first threaded section (131) is larger than that of the second threaded section (132);

the plane of the tail end of the hollow main body (100) is provided with a wire ring (140) for the threading of a suture.

4. The bone screw according to claim 1 wherein: the outer wall of the hollow main body (100) is provided with a double-thread section (151) and a columnar polished rod section (152), and the length of the double-thread section (151) is greater than that of the columnar polished rod section (152); the tail end of the columnar polished rod section (152) is sleeved with a pressure pad (153), and a plurality of threading holes are formed in the pressure pad (153); an interface pressing cap (154) is arranged at the end part, far away from the double-thread section (151), of the columnar polished rod section (152).

5. The bone screw according to claim 1 wherein: a middle threading hole (221) is formed in the second action section (220), and a conical wire clamping groove (222) is formed between the middle threading hole (221) and the tail of the second action section (220);

the outer wall of the hollow main body (100) is provided with a double-thread section (161), a blank section (162) and a single-thread conical thread section (163), and the length of the double-thread section (161) is greater than that of the single-thread conical thread section (163); the blank section (162) is disposed between the double threaded section (161) and the single tapered threaded section (163); the end part of the double-thread section (161) far away from the blank section (162) is a conical screw head.

6. The bone screw according to claim 5 wherein: the hexagonal connector (500) is further included;

the end part, far away from the first action section (210), of the second action section (220) is provided with a countersunk threaded hole, and the hexagonal connecting piece (500) is used for being installed in the countersunk threaded hole.

7. The bone screw according to claim 1 wherein: the second action section (220) is provided with a middle threading hole (221);

the outer wall of the hollow main body (100) is provided with a double-thread section (161), a blank section (162) and a single-thread tapered thread section (163), and the length of the double-thread section (161) is larger than that of the single-thread tapered thread section (163); the blank section (162) is disposed between the double-threaded section (161) and the single-threaded tapered threaded section (163); the end part of the double-thread section (161) far away from the blank section (162) is a conical screw head;

a threading hole is formed in the side wall of the single-thread conical threaded section (163);

a wire releasing groove is formed between the side wall of the single-wire conical thread section (163) and the inner cavity, and the wire releasing groove is communicated with the wire threading hole.

8. A knotting-free bone-knitting system is characterized in that: the system comprises a plurality of bone screws according to any one of claims 1 to 7, which are connected to each other by a suture to form a knot-free traction anchoring surface.

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