CN118000879A - Needle for knee joint replacement filling - Google Patents
Needle for knee joint replacement filling Download PDFInfo
- Publication number
- CN118000879A CN118000879A CN202410272841.1A CN202410272841A CN118000879A CN 118000879 A CN118000879 A CN 118000879A CN 202410272841 A CN202410272841 A CN 202410272841A CN 118000879 A CN118000879 A CN 118000879A
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- CN
- China
- Prior art keywords
- section
- needle
- close
- screw thread
- needle body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000000629 knee joint Anatomy 0.000 title claims abstract description 12
- 238000013150 knee replacement Methods 0.000 claims description 14
- 230000004323 axial length Effects 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract description 20
- 210000000988 bone and bone Anatomy 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 4
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
A knee joint replacement filling needle comprises a needle body, a breaking part and a needle head. The needle head comprises a round head section, a feeding section and a close-fitting section. The round head section is located the free end of needle head, the round head section is semi-circular structure, can protect the pore inside when getting into the pore, prevents to scrape the pore inner wall, still can polish the pore inner wall at the process of getting into simultaneously, the screw in of follow-up feed section of being convenient for. The utility model discloses a novel screw thread structure is formed by the screw thread, the screw thread is provided with the second screw thread on the lateral wall of close-fitting section, the screw thread cross-section of second screw thread is followed close-fitting section is close to the one end of feed section to be close to needle body portion changes triangle-shaped from trapezoidal gradually, when boring into the pore, feed section can expand new screw thread cooperation structure with the bone, the cross-section is trapezoidal screw thread both sides atress in the during operation to can increase the area of contact between the profile, thereby improve the ability of bearing the load, bear great pulling force and pressure, and relatively stable.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a knee joint replacement filling needle.
Background
The screw needle belongs to one kind of medical apparatus and is used mainly in fracture treatment, in knee joint replacement, in filling and supporting of femoral side opening and tibial plateau in knee joint replacement, there is one hole in the middle after femoral condyle osteotomy, and the screw needle is used in filling this hole. When the common threaded needle is used, firstly, a threaded needle with proper length is selected, the tail part of the threaded needle is clamped on an electric hand drill, and the head part of the threaded needle is screwed in along a pore canal; then, when the screw needle is in depth at one end of the screw needle, the screw threads on the screw needle body pull bones at two sides of the fracture part to each other, so that the fracture line is closed; finally, the overlong tail of the threaded needle is sheared, and a certain residual length is reserved, so that the threaded needle is pulled out in the later period. When the threaded needle in the prior art is used, the whole-section sizing thread is used for pressurizing and closing bones at two sides of a fracture part, because the screwing thread is worn for a long time on the orifice, the orifice and the thread are easy to loosen, and the pressurizing effect of the common thread on the bones is insufficient, so that the problem of poor fixing effect is solved.
Disclosure of Invention
In view of the above, the present invention provides a knee joint replacement filling needle to solve the above-mentioned technical problems.
A knee joint replacement filling needle comprises a needle body, a breaking part arranged at one end of the needle body, and a needle head arranged on the breaking part. The needle portion includes a rounded head section, a feed section, and a tight fitting section. The round head section is positioned at the free end of the needle head section, the round head section is in a semicircular structure, two ends of the feeding section are respectively connected with the round head section and the close-fitting section, the diameters of the feeding section are the same, the outer side wall of the feeding section is provided with a first thread with a trapezoidal section, the close-fitting section is connected with the feeding section and the needle body, and the diameter of the close-fitting section gradually increases from one end close to the feeding section to one end close to the needle body.
Further, the needle body is cylindrical and is made of titanium alloy, magnesium alloy, zinc alloy or PEEK, reinforced carbon fiber and ultra-high molecular weight polyethylene.
Further, the needle body is provided with connecting threads.
Further, the breaking part is arranged around the joint of the needle part and the needle body, and the diameter of the breaking part is smaller than that of the needle body.
Further, the axial length of the close-fitting section is greater than the axial length of the feed section.
Further, a second thread is arranged on the outer side wall of the close-fitting section, and the thread section of the second thread is gradually changed from a trapezoid to a triangle from one end of the close-fitting section close to the feeding section to one end of the close-fitting section close to the needle body.
Further, a plurality of grooves which are arranged at intervals are also arranged on the close-fit section.
Compared with the prior art, the knee joint replacement filling needle provided by the invention can protect the inside of the duct when entering the duct through the round head section with the semicircular structure, so that the inner wall of the duct is prevented from being scratched, and the inner wall of the duct can be polished in the entering process, so that the subsequent screwing-in of the feeding section is facilitated. The feeding section is characterized in that a first thread with a trapezoid cross section is arranged on the outer side wall of the feeding section, the diameter of the close-fit section gradually increases from one end close to the feeding section to one end close to the needle body, a second thread is arranged on the outer side wall of the close-fit section, the thread cross section of the second thread gradually changes from a trapezoid to a triangle from one end close to the feeding section to one end close to the needle body, when the feeding section and a bone are drilled into a pore canal, a new thread matching structure can be expanded between the feeding section and the bone, the threads with trapezoid cross section are stressed on both sides during working, the contact area between the profiles can be increased, so that the load bearing capacity is improved, the larger tensile force and the pressure are borne, and the feeding section is relatively stable. The diameter of the close-fitting section is gradually increased to better fit the inner wall of the pore canal, so that the pressurizing of the pore canal is realized. Meanwhile, the diameter is gradually increased, so that the phenomenon that bones and threads are loosened due to long-time abrasion of the inner wall of the pore canal by the feeding section is avoided, and the close-fitting section is guaranteed to be attached to the inner wall of the pore canal.
Drawings
Fig. 1 is a schematic view showing the structure of a first embodiment of a knee replacement filling needle according to the present invention.
Fig. 2 is a schematic view of the knee replacement filling needle a shown in fig. 1.
Fig. 3 is a schematic view showing the structure of a second embodiment of the knee replacement filling needle of fig. 1.
Detailed Description
Specific embodiments of the present invention are described in further detail below. It should be understood that the description herein of the embodiments of the invention is not intended to limit the scope of the invention.
Fig. 1 to 2 are schematic structural views of a knee replacement filling needle according to the present invention. The knee replacement filling needle includes a needle body 10, a breaking portion 20 provided at one end of the needle body 10, and a needle head 30 provided on the breaking portion 20. It is conceivable that the knee replacement filling needle further includes other functional modules, such as breaking assemblies, electric drills, etc., which are known to those skilled in the art and will not be described in detail herein.
The needle body 10 is cylindrical and may be made of a metal material such as titanium alloy, magnesium alloy, zinc alloy, or PEEK, reinforced carbon fiber, or ultra high molecular weight polyethylene nonmetallic material. The needle body 10 is provided with a connecting thread 11, and the connecting thread 11 is used for being connected with an external electric hand drill so as to control the knee joint replacement filling needle to rotate to drill into a bone.
The breaking part 20 is arranged around the joint of the needle head 30 and the needle body 10, and the diameter of the breaking part 20 is smaller than that of the needle body 10, so that the joint of the needle head 30 and the needle body 10 can be broken more easily.
The needle portion 30 includes a rounded head section 31, a feed section 32, and a tight fitting section 33.
The round head section 31 is located at the free end of the needle portion 30, and is firstly contacted with the hole canal when the needle portion is drilled into bone, and the round head section 31 has a semicircular structure, so that the inside of the hole canal can be protected when the needle portion enters the hole canal, and the inner wall of the hole canal can be prevented from being scratched. And the inner wall of the duct is polished in the entering process, so that the subsequent feeding section 32 can be screwed in conveniently.
The two ends of the feeding section 32 are respectively connected with the round head section 31 and the close-fitting section 33, the diameters of the feeding section 32 are the same, a first thread 321 with a trapezoid cross section is arranged on the outer side wall of the feeding section 32, when the feeding section is drilled into a pore canal, a new thread matching structure can be expanded with bones, the feeding section can also be matched with the first thread 321, and the opposite pressurizing closing effect is achieved on two sides of a fracture part. In addition, the first thread 321 has a trapezoid cross section, is stressed on two sides during working, and can increase the contact area between the teeth, so that the capacity of bearing load is improved, larger tensile force and pressure are borne, and the first thread is relatively stable.
The axial length of the tight-fitting section 33 is greater than the axial length of the feed section 32. The close-fitting section 33 is connected with the feeding section 32 and the needle body 10, the diameter of the close-fitting section 33 gradually increases from one end close to the feeding section 32 to one end close to the needle body 10, a second thread 331 is arranged on the outer side wall of the close-fitting section 33, the thread section of the second thread 331 gradually changes from trapezoidal to triangular from one end of the close-fitting section 33 close to the feeding section 32 to one end close to the needle body 10, namely, the upper bottom of the trapezoidal thread is gradually shortened, so that when screwing in, the upper bottom of the trapezoidal thread is gradually shortened along with the change of the depth of attack, and the diameter of the close-fitting section 33 gradually increases to better fit the inner wall of the duct, thereby realizing the pressurization of the duct. Meanwhile, the gradual increase of the diameter avoids the phenomenon that bones and threads are loosened due to long-time abrasion of the inner wall of the pore canal by the feeding section 32, and ensures that the close-fitting section 33 is attached to the inner wall of the pore canal. The teeth which are gradually transformed into triangles are meshed, so that the friction force between the teeth and the pore canal can be increased, and the fixing effect is improved.
The tight-fit section 33 is further provided with a plurality of grooves 331 arranged at intervals, and the grooves 331 are used for enabling the needle head 30 to be rotated for further locking or dismantling after the needle body 10 is broken off by a special spanner which is clamped into the grooves 331.
Fig. 3 is a schematic structural view of a knee replacement filling needle according to a second embodiment of the present invention. In comparison with the first embodiment, only the axial length of the feeding section 32 is greater than the axial length of the close-fitting section 33 and no threads are provided on the outer side wall of the close-fitting section 33, which embodiment is suitable for different situations, such as the case where the duct is deeper. Thus in the second embodiment, the same reference numerals as in the first embodiment are used.
Compared with the prior art, the knee joint replacement filling needle provided by the invention can protect the inside of the duct when entering the duct through the round head section 31 with a semicircular structure, so that the inner wall of the duct is prevented from being scratched, and meanwhile, the inner wall of the duct can be polished in the entering process, so that the subsequent screwing-in of the feeding section 32 is facilitated. The diameter of the close-fitting section 33 gradually increases from one end close to the feeding section 32 to one end close to the needle body 10, the outer side wall of the close-fitting section 33 is provided with a second thread 331, the thread cross section of the second thread 331 gradually changes from the end of the close-fitting section 33 close to the feeding section 32 to the end close to the needle body 10 from the trapezoid to the triangle, when the screw is drilled into a pore canal, the feeding section 32 and the bone can expand a new thread matching structure, the threads with the trapezoid cross section are stressed at both sides during working, the contact area between the threads can be increased, the load bearing capacity is improved, the load bearing capacity is increased, the tension and the pressure are borne, and the screw is relatively stable. The diameter of the close-fitting section 33 is gradually increased to better fit the inner wall of the pore canal, so that the pore canal is pressurized. Meanwhile, the gradual increase of the diameter avoids the phenomenon that bones and threads are loosened due to long-time abrasion of the inner wall of the pore canal by the feeding section 32, and ensures that the close-fitting section 33 is attached to the inner wall of the pore canal.
The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions or improvements within the spirit of the present invention are intended to be covered by the claims of the present invention.
Claims (7)
1. A knee replacement filling needle, characterized in that: the knee joint replacement filling needle comprises a needle body, a breaking part and a needle head, wherein the breaking part is arranged at one end of the needle body, the needle head is arranged on the breaking part, the needle head comprises a round head section, a feeding section and a tight-fit section, the round head section is positioned at the free end of the needle head, the round head section is of a semicircular structure, two ends of the feeding section are respectively connected with the round head section and the tight-fit section, the diameter of the feeding section is the same, a first thread with a trapezoidal section is arranged on the outer side wall of the feeding section, the tight-fit section is connected with the feeding section and the needle body, and the diameter of the tight-fit section is gradually increased from one end close to the feeding section to one end close to the needle body.
2. The knee replacement filling needle according to claim 1, wherein: the needle body is cylindrical and is made of titanium alloy, magnesium alloy, zinc alloy or PEEK, reinforced carbon fiber and ultra-high molecular weight polyethylene.
3. The knee replacement filling needle according to claim 1, wherein: the needle body is provided with connecting threads.
4. The knee replacement filling needle according to claim 1, wherein: the breaking part is arranged around the joint of the needle part and the needle body, and the diameter of the breaking part is smaller than that of the needle body.
5. The knee replacement filling needle according to claim 1, wherein: the axial length of the close-fitting section is greater than the axial length of the feeding section.
6. The knee replacement filling needle according to claim 1, wherein: the outer side wall of the close-fitting section is provided with a second thread, and the thread section of the second thread is gradually changed from a trapezoid to a triangle from one end of the close-fitting section, which is close to the feeding section, to one end of the close-fitting section, which is close to the needle body.
7. The knee replacement filling needle according to claim 1, wherein: and a plurality of grooves which are arranged at intervals are also arranged on the close-fit section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410272841.1A CN118000879A (en) | 2024-03-11 | 2024-03-11 | Needle for knee joint replacement filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410272841.1A CN118000879A (en) | 2024-03-11 | 2024-03-11 | Needle for knee joint replacement filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118000879A true CN118000879A (en) | 2024-05-10 |
Family
ID=90954042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410272841.1A Pending CN118000879A (en) | 2024-03-11 | 2024-03-11 | Needle for knee joint replacement filling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118000879A (en) |
-
2024
- 2024-03-11 CN CN202410272841.1A patent/CN118000879A/en active Pending
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