CN112244914A - Extrusion type expansion anchor - Google Patents
Extrusion type expansion anchor Download PDFInfo
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- CN112244914A CN112244914A CN202011030831.5A CN202011030831A CN112244914A CN 112244914 A CN112244914 A CN 112244914A CN 202011030831 A CN202011030831 A CN 202011030831A CN 112244914 A CN112244914 A CN 112244914A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/148—Materials at least partially resorbable by the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0408—Rivets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/042—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors plastically deformed during insertion
- A61B2017/0422—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors plastically deformed during insertion by insertion of a separate member into the body of the anchor
- A61B2017/0424—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors plastically deformed during insertion by insertion of a separate member into the body of the anchor the separate member staying in the anchor after placement
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Abstract
The invention relates to an extrusion type expansion anchor, which comprises an anchor body and an expansion element, wherein a notch is arranged near the front end of the anchor body; the expansion element is of a columnar structure, and the side wall of the expansion element is provided with a B; a and B are mutually matched to form stop clamping matching. The extrusion type expansion anchor adopts the self-locking expansion structure, so that the anti-pulling force of the anchor body is increased, the anchor body is not easy to fall off after being implanted into a bone, the number of elements for anchoring outside the anchor body is not required to be increased, the problem that the operation overall time is influenced due to the difficulty in knocking in the anchor or the long screwing-in time is avoided, meanwhile, the one-way self-locking structure of the anchor body and the expansion element is formed by the non-return clamping matching of the A and the B, the expansion element is not easy to loosen after being extruded into the anchor body, the expansion element is not required to have high shearing strength, and the extrusion type expansion anchor is suitable for absorbable materials and PEEK materials.
Description
Technical Field
The invention belongs to the technical field of bone implant anchors and relates to an extrusion type expansion anchor.
Background
The anchor is mainly used for tendon soft tissue injuries such as shoulder joints, knee joints and the like clinically, the purpose of healing the tendon and bone is achieved by implanting the anchor into a bone hole and fixing the torn tendon tissue on the bone by utilizing a suture, and the stability of the implanted anchor in the bone is particularly important because joints of people are in an active state for a long time.
The existing knocking-in type and screwing-in type anchors provide anti-extraction force simply by means of extrusion and anchoring between teeth on the outer side of an anchor body and the inner wall of a bone hole, and because the outer diameter of the anchor is fixed, the number of the teeth is required to be enough in order to improve the extraction force, so that the difficulty in knocking-in of the anchor or the long screwing-in time are caused, and the integral time of the operation is influenced.
Patent CN201520214267.0 discloses an anchor which utilizes expansion of the diameter of the head of the anchor body to increase the compression force between the anchor body and the bone hole, thereby increasing the pullout resistance of the anchor, and the number of the thread of the internal expansion element is less, thereby reducing the operation time required when the expansion element is screwed in, reducing the whole operation time and difficulty to a certain extent, but, for polymer materials such as absorbable and PEEK materials, the design of the contact convex points of the anchor main body for anchoring with the bone hole leads to poor fixing strength, and the screwed-in bolt expansion element has higher requirement on the shearing strength of the bolt, so that the absorbable and high polymer materials such as PEEK materials are easy to be twisted off when being implanted, and in addition, in the operation process, the screw-in implantation mode is more complex and difficult to operate compared with the knock type implantation mode, the operation time is prolonged, and the operation difficulty is increased.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an extrusion type expansion anchor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an extrusion type expansion anchor nail is an anchor nail capable of self-locking and resisting pulling out after expansion, and comprises an anchor nail body and an expansion element, wherein a notch is formed near the front end of the anchor nail body, the expansion element is used for inserting the rear end of the anchor nail body into an inner cavity of the anchor nail body to radially expand the front end of the anchor nail body, and the inner side wall of the anchor nail body is provided with A; the expansion element is of a columnar structure, and the side wall (if the expansion element is of a hollow structure, the side wall is the outer side wall) is provided with a B; a and B are mutually matched to form stop clamping matching, and the stop clamping matching enables the expansion element to be inserted into the inner cavity of the anchor body only from the rear end of the anchor body and cannot move reversely.
The invention aims to solve the technical problems that in the prior art, a screw-in bolt expansion element has higher requirements on the shearing strength of a bolt, so that polymer materials such as absorbable PEEK materials and the like are easy to twist off when implanted, and simultaneously, the screw-in implantation mode is more complex and difficult to operate compared with a knock type implantation mode, the operation time is prolonged, and the operation difficulty is increased.
As a preferred technical scheme:
the extrusion type expansion anchor nail is clamped in an annular mode; b is an annular bulge i, and the central axis of the annular bulge i is superposed with the central axis of the expansion element; a is an annular groove used for accommodating the annular protrusion i, and the central axis of the annular groove is superposed with the central axis of the anchor nail body.
According to the extrusion type expansion anchor, the annular bulge i is of a hollow circular truncated cone-shaped structure, the small end of the annular bulge i faces the front end of the expansion element, the large end of the annular bulge i faces the rear end of the expansion element, the front end of the expansion element is the end, entering into the inner cavity of the anchor body, of the expansion element firstly, as the central axis of the annular bulge i is overlapped with the central axis of the expansion element and the annular bulge i is of the hollow circular truncated cone-shaped structure, the central axis of the circular truncated cone is overlapped with the central axis of the expansion element, and the large end and the small end of the circular truncated cone are perpendicular to the central axis of the expansion element, the; because the annular groove and the annular bulge i are mutually matched to form the stopping clamping fit, the annular groove is of a hollow truncated cone-shaped structure, the small end of the annular groove faces the front end of the anchor body, and the large end of the annular groove faces the rear end of the anchor body.
In the extrusion type expansion anchor nail, the annular protrusions i are multiple and are sequentially arranged along the axial direction of the expansion element and connected with each other to form a saw-tooth shape; because the annular grooves and the annular protrusions i are matched with each other to form stop clamping matching, similarly, the number of the annular grooves is multiple, and the annular grooves are sequentially arranged along the axial direction of the anchor body and are connected with each other to form a saw-tooth shape.
The extrusion type expansion anchor nail is characterized in that the number of the annular protrusions i is 4-6; the number of the annular grooves is the same as that of the annular bulges i; the number of the annular protrusions i should not be too large, which would increase the force required to extrude the stent and increase the operation time and difficulty.
In the extrusion type expansion anchor, the heights of the annular protrusions i are the same (it has been explained above that the annular protrusions i are of a hollow circular truncated cone-shaped structure, and the height, i.e. the height of the circular truncated cone, is equal to the distance between the two end surfaces of the circular truncated cone), the sizes of the small ends are the same, the sizes of the large ends are gradually increased from the front end to the middle part of the expansion element, and the sizes of the large ends are kept unchanged from the middle part to the rear end of the expansion element; the heights of all the annular grooves are the same, the sizes of the small ends are the same, and the sizes of the large ends are the same; the size of the small end of the annular groove is the same as that of the small end of the annular protrusion i, and the size of the large end of the annular groove is the same as that of the large end of the annular protrusion i closest to the rear end of the expansion element; the invention controls the sizes of the annular bulges i and the annular grooves, thereby not only ensuring the backstop strength (namely the self-locking capability and the anti-pull-out capability of the expansion element in the anchor body) after implantation, but also facilitating the implantation of the expansion element in the anchor body.
In the extrusion type expansion anchor bolt, the expansion element is divided into an upper section and a lower section along the axial direction, and the front end of the expansion element is positioned at the lower section of the expansion element; the expansion element is of a cylindrical structure, and the annular bulge i is arranged on the upper section of the expansion element; the front end of the expansion element is designed with a round angle so as to reduce the resistance in the pressing-in process;
the inner cavity of the anchor body is divided into an upper section and a lower section along the axial direction, and the front end of the anchor body is positioned at the lower section of the inner cavity of the anchor body; the upper section of the inner cavity of the anchor body is of a cylindrical structure, the lower section of the inner cavity of the anchor body is of a circular truncated cone-shaped structure with a large upper part and a small lower part, and the annular groove is etched on the cavity wall of the upper section of the inner cavity of the anchor body; the truncated cone-shaped structure of the lower section of the inner cavity of the anchor body is matched with the notch, so that after the expansion element is pressed into the anchor body, the front end of the anchor body expands, and the anchoring teeth outside the anchor body are tightly extruded with the bone holes, thereby greatly improving the pulling-out capacity of the anchor and enhancing the pulling-out resistance;
the diameter of the expansion element is at least larger than the minimum diameter of the lower section of the cavity of the anchor body, so that the expansion element can extrude the front end of the anchor body after being inserted into the cavity of the anchor body from the rear end of the anchor body to radially expand the front end of the anchor body;
the diameter of the expansion element is the same as the diameter of the upper section of the anchor body lumen to ensure that the expansion element can be smoothly pressed into the anchor body without damaging the annular recess of the anchor body lumen.
According to the extrusion type expansion anchor, an included angle between a generatrix of the lower section of the inner cavity of the anchor body (the lower section of the inner cavity of the anchor body is in a truncated cone-shaped structure with a large upper part and a small lower part, and the generatrix of the lower section of the inner cavity of the anchor body is the generatrix of the truncated cone with the large upper part and the small lower part) and a central axis of the anchor body is within 10 degrees, so that implantation difficulty and anchor body cracking caused by too large expansion diameter are avoided, if the expansion diameter of the head part of the anchor is large due to too large angle, the anchor body can bear large extrusion force, implantation difficulty is caused on one hand, and the anchor body can crack due to excessive stress on the other hand.
A squeeze-type expansion anchor as described above, the expansion element having suture slots therein; the suture groove is designed to embed the suture into the expansion element, so that a good space is provided for the free sliding of the suture in the expansion element, and the problem that the suture is abraded by bone when being implanted to reduce the strength of the suture is avoided; the suture groove is a U-shaped groove and is formed by sequentially connecting a strip-shaped groove m, a through hole and a strip-shaped groove n, the strip-shaped groove m and the strip-shaped groove n are arranged on the side wall of the expansion element and are parallel to the central shaft of the expansion element, and the through hole penetrates through the expansion element and is perpendicular to the central shaft of the expansion element; the through hole is a rectangular through hole, the side length of the rectangle is not less than 0.6mm, according to the description of the specification of the suture in the pharmaceutical industry standard file, the suture groove with the size can enable a #2 suture or two 2-0 sutures to be completely placed in the suture groove, and all the bent angles in the suture groove are round corners so as to avoid the suture from being abraded and sanded by sharp edges when sliding in the suture groove.
According to the extrusion type expansion anchor, the outer side wall of the anchor body is provided with a plurality of annular protrusions j with the same shape and size; the annular bulge j is of a hollow truncated cone-shaped structure, the small end of the annular bulge j faces the front end of the anchor nail body, the large end of the annular bulge j faces the rear end of the anchor nail body, the structure of the annular bulge j can prevent the anchor nail body from falling out of a bone hole, good anchoring capability is provided for anchoring of the anchor nail body, an included angle between a generatrix of the annular bulge j and a central axis of the anchor nail body is set to be small, 30 degrees is better, and the included angle is not more than 45 degrees so as to reduce the implantation difficulty of the anchor nail body and the implantation force required when the anchor nail body is implanted; all the annular bulges j are arranged along the axial direction of the anchor nail body at intervals, not only can be arranged at equal intervals, but also can be arranged in a way that the intervals from the front end of the nail body to the rear end of the nail body are gradually reduced along the axial direction of the anchor nail body, the latter arrangement mode not only can reduce the force required during implantation, but also can lead the anchor nail and the bone hole to be better anchored together aiming at the bone conditions of different cancellous bones and cortical bones.
When the extrusion type expansion anchor is implanted, the anchor body is implanted into a bone hole, the expansion element is extruded into the inner cavity of the anchor body in an extrusion mode, the notch is formed near the front end of the anchor body, and the radius of the lower section of the inner cavity of the anchor body is gradually reduced from top to bottom, so that the front end of the anchor body is expanded after the expansion element is extruded, the anchor body expands, the annular protrusion i on the side wall of the expansion element is matched with the annular groove on the inner side wall of the anchor body to form stop clamping matching, and the expansion element can be effectively prevented from falling out of the anchor body. In addition, the annular protrusion j on the outer side wall of the anchor body can provide strong anchor anchoring performance, and the suture can freely slide through the suture groove on the expansion element and is prevented from being abraded by bone when being implanted.
Has the advantages that:
(1) the extrusion type expansion anchor adopts the self-locking expansion structure, so that the anti-pulling force of the anchor body is increased, the anchor body is not easy to fall off after being implanted into a bone, the number of elements for anchoring outside the anchor body is not required to be increased, and the problem that the integral time of an operation is influenced because the anchor is difficult to knock in or is long in screwing time is avoided;
(2) the extrusion type expansion anchor nail of the invention forms a unidirectional self-locking structure of the anchor nail body and the expansion element by utilizing the stopping and clamping matching of the annular bulge i and the annular groove, so that the expansion element is not easy to loosen after being extruded into the anchor nail body, and the expansion element does not need to have higher shearing strength and can be suitable for absorbable materials and PEEK materials;
(3) the extrusion type expansion anchor nail adopts an extrusion type implantation mode, reduces the operation difficulty and saves the operation time under the condition of ensuring the extraction force and the stability;
(4) the stepped anchoring teeth (composed of a plurality of annular bulges j) are arranged on the outer side wall of the anchor body of the extrusion type expansion anchor, so that the overall anchoring strength of the anchor is enhanced;
(5) the design of the expansion element and the suture groove ensures that the suture can be completely embedded into the expansion element, ensures the adjustability of the suture before the expansion element is completely implanted, reduces the friction between the suture and the anchor main body as well as between the suture and the bone hole when the expansion element is implanted, reduces the abrasion to the suture and ensures the strength of the suture.
Drawings
FIG. 1 is a schematic view of the overall construction of a squeeze type expansion anchor;
FIG. 2 is a cross-sectional view of a squeeze expansion anchor;
FIG. 3 is a cross-sectional view of the expansion member;
FIG. 4 is a cross-sectional view of the anchor body;
wherein, 1-anchor body, 2-expansion element, 3-notch, 4-annular bulge i, 5-expansion element front end, 6-expansion element rear end, 7-expansion element upper section, 8-expansion element lower section, 9-annular groove, 10-anchor body front end, 11-anchor body rear end, 12-anchor body inner cavity upper section, 13-anchor body inner cavity lower section, 14-strip groove m, 15-through hole, 16-strip groove n, 17-annular bulge j.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
An extrusion type expansion anchor comprises an anchor body 1 and an expansion element 2, wherein a notch 3 is arranged near the front end 10 of the anchor body, and the expansion element 2 is used for being inserted into an inner cavity of the anchor body 1 from the rear end 11 of the anchor body to radially expand the front end 10 of the anchor body;
the expansion element 2 is of a cylindrical structure and is divided into an upper section and a lower section along the axial direction, the side wall of the upper section 7 of the expansion element is provided with an annular bulge i 4, and the central axis of the annular bulge i 4 is superposed with the central axis of the expansion element 2; the annular bulge i 4 is of a hollow round table-shaped structure, the small end of the annular bulge is towards the front end 5 of the expansion element, the large end of the annular bulge is towards the rear end 6 of the expansion element, and the front end 5 of the expansion element is the end, which enters the inner cavity of the anchor body 1 firstly, of the expansion element 2 and is positioned at the lower section 8 of the expansion element; the number of the annular protrusions i 4 is multiple (preferably 4-6), and the annular protrusions are sequentially arranged along the axial direction of the expansion element 2 and are connected with one another to form a saw-tooth shape; the heights of the annular bulges i 4 are the same, the sizes of the small ends are the same, the sizes of the large ends are gradually increased from the front end 5 to the middle part of the expansion element, and the sizes of the large ends are kept unchanged from the middle part to the rear end of the expansion element 2;
an annular groove 9 for accommodating the annular protrusion i 4 is formed in the inner side wall of the anchor body 1, and the central axis of the annular groove 9 is overlapped with the central axis of the anchor body 1; the annular groove 9 is of a hollow round table-shaped structure, the small end of the annular groove faces the front end 10 of the anchor body, and the large end of the annular groove faces the rear end 11 of the anchor body; the annular grooves 9 are multiple (the number is the same as that of the annular bulges i 4), are sequentially arranged along the axial direction of the anchor body 1 and are mutually connected into a sawtooth shape; the heights of the annular grooves 9 are the same, the sizes of the small ends are the same, and the sizes of the large ends are the same; the size of the small end of the annular groove 9 is the same as the size of the small end of the annular protrusion i 4, and the size of the large end of the annular groove 9 is the same as the size of the large end of the annular protrusion i 4 closest to the rear end 6 of the expansion element; the inner cavity of the anchor body 1 is divided into an upper section and a lower section along the axial direction, and the front end 10 of the anchor body is positioned at the lower section 13 of the inner cavity of the anchor body; the upper section 12 of the inner cavity of the anchor body is of a cylindrical structure, the lower section 13 of the inner cavity of the anchor body is of a circular truncated cone-shaped structure with a large upper part and a small lower part, and the annular groove 9 is etched on the cavity wall of the upper section 12 of the inner cavity of the anchor body; the diameter of the expansion element 2 is larger than the smallest diameter of the lower section 13 of the anchor body lumen; the diameter of the expansion element 2 is the same as the diameter of the upper section 12 of the anchor body lumen; the included angle between the generatrix of the lower section 13 of the anchor body cavity and the central axis of the anchor body 1 is within 10 degrees;
the annular protrusion i 4 and the annular groove 9 are matched with each other to form stop clamping matching;
a suture groove is arranged in the expansion element 2; the suture groove is a U-shaped groove and is formed by sequentially connecting a strip-shaped groove m 14, a through hole 15 and a strip-shaped groove n 16, the strip-shaped groove m 14 and the strip-shaped groove n 16 are arranged on the side wall of the expansion element 2 and are parallel to the central shaft of the expansion element 2, and the through hole 15 penetrates through the expansion element 2 and is perpendicular to the central shaft of the expansion element 2; the through hole 15 is a rectangular through hole 15, and the side length of the rectangle is not less than 0.6 mm;
a plurality of annular bulges j 17 with the same shape and size are arranged on the outer side wall of the anchor nail body 1; the annular bulge j 17 is of a hollow round table-shaped structure, the small end of the annular bulge is towards the front end 10 of the anchor nail body, and the large end of the annular bulge is towards the rear end 11 of the anchor nail body; all the annular projections j 17 are arranged along the axial direction of the anchor body 1 at intervals.
Claims (10)
1. An extrusion type expansion anchor comprises an anchor body and an expansion element, wherein a notch is formed near the front end of the anchor body, and the expansion element is used for being inserted into an inner cavity of the anchor body from the rear end of the anchor body to radially expand the front end of the anchor body; the expansion element is of a columnar structure, and the side wall of the expansion element is provided with a B; a and B are mutually matched to form stop clamping matching.
2. The extrusion-type expansion anchor of claim 1, wherein the clamp is a loop clamp; b is an annular bulge i, and the central axis of the annular bulge i is superposed with the central axis of the expansion element; a is an annular groove used for accommodating the annular protrusion i, and the central axis of the annular groove is superposed with the central axis of the anchor nail body.
3. The extrusion type expansion anchor of claim 2, wherein the annular protrusion i is a hollow truncated cone-shaped structure, the small end of the annular protrusion is towards the front end of the expansion element, the large end of the annular protrusion is towards the rear end of the expansion element, and the front end of the expansion element is the end of the expansion element which enters the inner cavity of the anchor body firstly; the annular groove is of a hollow round table-shaped structure, the small end of the annular groove faces the front end of the anchor body, and the large end of the annular groove faces the rear end of the anchor body.
4. The extrusion type expansion anchor according to claim 3, wherein the annular protrusions i are plural in number, are arranged in sequence along the axial direction of the expansion element, and are connected with each other in a zigzag manner; the number of the annular grooves is multiple, the annular grooves are sequentially arranged along the axial direction of the anchor nail body and are connected with each other to form a saw-toothed shape.
5. The extrusion type expansion anchor of claim 4, wherein the number of the annular protrusions i is 4-6; the number of the annular grooves is the same as that of the annular protrusions i.
6. The extrusion-type expansion anchor of claim 4 or 5, wherein the height of each annular protrusion i is the same, the size of the small end is the same, the size of the large end is gradually increased from the front end to the middle part of the expansion element, and the size of the large end is kept constant from the middle part to the rear end of the expansion element; the heights of all the annular grooves are the same, the sizes of the small ends are the same, and the sizes of the large ends are the same; the size of the small end of the annular groove is the same as the size of the small end of the annular protrusion i, and the size of the large end of the annular groove is the same as the size of the large end of the annular protrusion i closest to the rear end of the expansion element.
7. The swaged expansion anchor of claim 6, wherein the expansion member is axially divided into upper and lower sections, the expansion member leading end being located at the lower section of the expansion member; the expansion element is of a cylindrical structure, and the annular bulge i is arranged on the upper section of the expansion element;
the inner cavity of the anchor body is divided into an upper section and a lower section along the axial direction, and the front end of the anchor body is positioned at the lower section of the inner cavity of the anchor body; the upper section of the inner cavity of the anchor body is of a cylindrical structure, the lower section of the inner cavity of the anchor body is of a circular truncated cone-shaped structure with a large upper part and a small lower part, and the annular groove is etched on the cavity wall of the upper section of the inner cavity of the anchor body;
the diameter of the expansion element is larger than the minimum diameter of the lower section of the anchor body cavity;
the expansion element has a diameter that is the same as the diameter of the upper section of the anchor body lumen.
8. The extrusion type expansion anchor of claim 7, wherein the included angle between the generatrix of the lower section of the anchor body cavity and the central axis of the anchor body is within 10 degrees.
9. The swaged expansion anchor of claim 1, wherein the expansion member has suture slots therein; the suture groove is a U-shaped groove and is formed by sequentially connecting a strip-shaped groove m, a through hole and a strip-shaped groove n, the strip-shaped groove m and the strip-shaped groove n are arranged on the side wall of the expansion element and are parallel to the central shaft of the expansion element, and the through hole penetrates through the expansion element and is perpendicular to the central shaft of the expansion element; the through holes are rectangular through holes, and the side length of each rectangle is not less than 0.6 mm.
10. The extrusion type expansion anchor of claim 1, wherein a plurality of annular bulges j with the same shape and size are arranged on the outer side wall of the anchor body; the annular bulge j is of a hollow round table-shaped structure, the small end of the annular bulge j faces the front end of the anchor nail body, and the large end of the annular bulge j faces the rear end of the anchor nail body; all the annular protrusions j are arranged along the axial direction of the anchor body at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030831.5A CN112244914A (en) | 2020-09-27 | 2020-09-27 | Extrusion type expansion anchor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030831.5A CN112244914A (en) | 2020-09-27 | 2020-09-27 | Extrusion type expansion anchor |
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| CN112244914A true CN112244914A (en) | 2021-01-22 |
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| CN202011030831.5A Pending CN112244914A (en) | 2020-09-27 | 2020-09-27 | Extrusion type expansion anchor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113456140A (en) * | 2021-08-31 | 2021-10-01 | 华中科技大学同济医学院附属协和医院 | Cross locking combined bone anchor |
| CN115005907A (en) * | 2022-05-25 | 2022-09-06 | 尤尼泰科(重庆)医疗科技有限公司 | Anchor with wire |
| CN115517752A (en) * | 2022-07-09 | 2022-12-27 | 北京天星博迈迪医疗器械有限公司 | Implanted bone screw and knotting-free bone screw system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113456140A (en) * | 2021-08-31 | 2021-10-01 | 华中科技大学同济医学院附属协和医院 | Cross locking combined bone anchor |
| CN115005907A (en) * | 2022-05-25 | 2022-09-06 | 尤尼泰科(重庆)医疗科技有限公司 | Anchor with wire |
| CN115517752A (en) * | 2022-07-09 | 2022-12-27 | 北京天星博迈迪医疗器械有限公司 | Implanted bone screw and knotting-free bone screw system |
| CN115607251A (en) * | 2022-07-09 | 2023-01-17 | 北京天星博迈迪医疗器械有限公司 | Anti-loose bone screw and knotting-free bone setting system |
| CN115517752B (en) * | 2022-07-09 | 2023-07-25 | 北京天星博迈迪医疗器械有限公司 | Implantable bone screw and knotting-free bone setting system |
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Application publication date: 20210122 |