CN107198562B - Fibula/radius intramedullary nail and fibula group and radius group using intramedullary nail - Google Patents
Fibula/radius intramedullary nail and fibula group and radius group using intramedullary nail Download PDFInfo
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- CN107198562B CN107198562B CN201710620710.8A CN201710620710A CN107198562B CN 107198562 B CN107198562 B CN 107198562B CN 201710620710 A CN201710620710 A CN 201710620710A CN 107198562 B CN107198562 B CN 107198562B
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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
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
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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
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
- A61B17/725—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with locking pins or screws of special form
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- General Health & Medical Sciences (AREA)
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- Surgical Instruments (AREA)
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Abstract
The fibula group and the radius group using the intramedullary nail comprise a fibula or a radius and a fibula/radius intramedullary nail inserted on the fibula or the radius. The fibula/radius intramedullary nail comprises a nail rod, an end cap arranged at one end of the nail rod and an anti-rotation part arranged on the side wall of the nail rod. The nail rod comprises a first connecting rod and a second connecting rod, and an included angle between the central axes of the first connecting rod and the second connecting rod is 170-160 degrees. The rotation preventing portion is disposed on an outer side wall of the second link and includes a plurality of locking teeth. The fibula/radius intramedullary nail is used for fixing the fibula or the radius after fracture, can achieve the self-locking effect, does not need to be provided with fixing screws, is simple and common in required mounting tools, greatly reduces the number, and is simple and convenient to operate.
Description
Technical Field
The invention relates to an orthopedic internal fixation instrument, in particular to a fibula/radius intramedullary nail, a fibula group and a radius group using the intramedullary nail.
Background
The similar products aiming at fibula and radial shaft fractures in the market at present are traditional intramedullary nails with locks, the products enter the way by adopting a near end (or a far end), one end of the products is fixed by using a lock nail, and the other end of the products is a polished rod, so the product cost is increased in the actual operation, the actual operation difficulty is higher, the failure rate of fixation is higher, the installation time is longer, and a plurality of locking devices are needed, so that the wounds to the skin and bones of a patient are larger in the installation and removal processes, and the radial anti-rotation and axial anti-shortening effects of the end of the polished rod are poor.
Disclosure of Invention
In view of the above, the present invention provides a fibula/radius intramedullary nail and a fibula set and a radius set using the intramedullary nail to solve the above problems.
A fibula/radius intramedullary nail comprises a nail rod, a terminal cap arranged at one end of the nail rod and an anti-rotation part arranged on the side wall of the nail rod. The nail rod comprises a first connecting rod and a second connecting rod connected with the first connecting rod. The included angle between the central axes of the first connecting rod and the second connecting rod is 170-160 degrees. The free end of the second link is a closed end with a rounded chamfer. The end cap is disposed at a free end of the first link. The rotation preventing portion is arranged on the outer side wall of the second connecting rod and comprises a plurality of clamping teeth. Each of the teeth extends along an axis of the second link. The contour line of the rotation preventing part on the section along the axis of the second connecting rod is an isosceles trapezoid, and the upper bottom of the isosceles trapezoid is closer to the free end of the second connecting rod than the lower bottom. The maximum diameter of the anti-rotation portion should be smaller than the maximum diameter of the end cap.
Further, the first connecting rod and the second connecting rod are solid rods.
Further, the circumferential length of the second connecting rod is greater than that of the first connecting rod, and the central axes of the first connecting rod and the second connecting rod are in the same plane.
Furthermore, a plurality of clamping teeth of the rotation preventing part are uniformly distributed by taking the axis of the second connecting rod as a central shaft.
Furthermore, on a section along the axis of the second connecting rod, the contour line of the end cap is an isosceles trapezoid, the upper bottom of the isosceles trapezoid is connected with the free end of the first connecting rod, and the diameter of the upper bottom of the isosceles trapezoid is equal to that of the first connecting rod.
Further, the contour line of the rotation prevention part on the cross section perpendicular to the axis of the second connecting rod and the contour line of the end cap on the cross section perpendicular to the axis of the first connecting rod may be coincident with each other or reduced in equal proportion.
A fibula group using a fibula/radius intramedullary nail, the fibula group including a fibula, and a fibula/radius intramedullary nail inserted in the fibula. The fibula is provided with a fibula outer ankle and a fibula body connected with the fibula outer ankle. The internal part of the fibula is provided with a fibula medullary cavity and a fibula middle edge. The fibula/radius intramedullary nail is inserted into the fibula medullary cavity and comprises a nail rod, an end cap arranged at one end of the nail rod and an anti-rotation part arranged on the side wall of the nail rod. The nail rod comprises a first connecting rod and a second connecting rod connected with the first connecting rod. The included angle between the central axes of the first connecting rod and the second connecting rod is 170-160 degrees. The free end of the second link is a closed end with a rounded chamfer. The end cap is disposed at a free end of the first link. The rotation preventing portion is disposed on an outer side wall of the second link and includes a plurality of locking teeth. Each of the teeth extends along an axis of the second link. The contour line of the rotation preventing part on the section along the axis of the second connecting rod is an isosceles trapezoid, and the upper bottom of the isosceles trapezoid is closer to the free end of the second connecting rod than the lower bottom. The anti-rotation portion is clamped in the fibula medullary cavity. The joint of the first connecting rod and the second connecting rod is far away from the fibula edge.
Further, the end cap is clamped in the lateral fibula malleolus.
A radius group using a fibula/intramedullary nail, the radius group having a radius and a fibula/intramedullary nail inserted over the radius. The radius has a radial styloid process and a radial shaft connected to the radial styloid process. The inside of the radial body is provided with a medullary cavity of the radius and a bone margin of the radius. The fibula/radius intramedullary nail is inserted into the marrow cavity of the radius. The fibula/radius intramedullary nail comprises a nail rod, an end cap arranged at one end of the nail rod and an anti-rotation part arranged on the side wall of the nail rod. The nail rod comprises a first connecting rod and a second connecting rod connected with the first connecting rod. The included angle between the central axes of the first connecting rod and the second connecting rod is 170-160 degrees. The free end of the second connecting rod is a closed end with a round and blunt chamfer. The end cap is disposed at a free end of the first link. The rotation preventing portion is disposed on an outer side wall of the second link and includes a plurality of locking teeth. Each of the teeth extends along an axis of the second link. The contour line of the rotation preventing part on the section along the axis of the second connecting rod is an isosceles trapezoid, and the upper bottom of the isosceles trapezoid is closer to the free end of the second connecting rod than the lower bottom. The rotation preventing part is clamped in the marrow cavity of the radius. The joint of the first connecting rod and the second connecting rod is far away from the radius bone margin.
Further, the endcap is clamped in the radial styloid process.
Compared with the prior art, the fibula/radius intramedullary nail is used for fixing the fibula or the radius after fracture, can achieve the self-locking effect, does not need to be provided with fixing screws, is simple and common in required mounting tools, greatly reduces the number, and is simple and convenient to operate. Meanwhile, after the fibula/radius intramedullary nail is inserted into the fibula or the radius, an in-vitro aiming device of the traditional intramedullary nail is not needed, so that the installation difficulty is reduced, the installation time is shortened, meanwhile, the fixation failure in the traditional locking mode is avoided, and the safety and the effectiveness are improved. In addition, because the fibula/radius intramedullary nail only needs to be opened at one end of the bone, the damage to the skin and the bone of the patient is reduced.
Drawings
Embodiments of the invention are described below with reference to the drawings, in which:
fig. 1 is a schematic cross-sectional view of a fibula using a fibula/radius intramedullary nail according to a first embodiment of the present invention.
Fig. 2 is an exploded view of the fibula/radius intramedullary nail of the fibula using the fibula/radius intramedullary nail of fig. 1.
Fig. 3 is a schematic cross-sectional view of a radius using a fibula/radius intramedullary nail according to a second embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention will be described in further detail below based on the drawings. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.
Please refer to fig. 1 and 2, which are schematic structural views of a fibula set 100 using a fibula/radius intramedullary nail according to a first embodiment of the present invention. The fibula set 100 includes a fibula 10 and a fibula/radius intramedullary nail 20 inserted in the fibula 10.
The fibula 10 is one of the two long bones on the lower leg of humans and vertebrates (tetrapods), located on the outer side of the lower leg. The fibula 10 includes a small fibula head 11, a lateral fibula malleolus 12, and a fibula body 13 connecting the small fibula head 11 and the lateral fibula malleolus 12. The fibula small head 11 is the upper end of the fibula 10, can be reached from the outer surface of the skin, is connected with the tibia only, and does not participate in the composition of the knee joint. The lateral fibula malleolus 12 is the lower end of the fibula, which together with the lower end of the tibia (not shown) and the talus (not shown) forms the ankle joint. The fibula body 13 has a concave lower portion, called the fibular rim 131, on the side facing the tibia (not shown). The fibula body 13 has a fibula cavity 132 therein. The detailed structure and operation of the fibula 10 should be known to those skilled in the art and will not be described herein.
The intramedullary nail 20 for the fibula/radius is inserted from the lateral fibular malleolus 12 of the fibula 10 and inserted into the medullary canal 132 of the fibula 13. The fibular/radial intramedullary nail 20 includes a shank 21, a cap 22 disposed at one end of the shank 21, and an anti-rotation portion 23 disposed on a side wall of the shank 21.
The nail shaft 21 includes a first link 211, and a second link 212 connected to the first link 211. The first link 211 and the second link 212 are integrally formed, and may be formed in a bent manner, and in order to ensure strength, the first and second links 211 and 212 are solid rods. The central axes of the first connecting rod 211 and the second connecting rod 212 are in the same plane, and the included angle theta between the central axes is 160 degrees to 170 degrees. The circumferential length of the first link 211 is smaller than that of the second link 212 to accommodate the physiological characteristics of the fibula 10 itself. The specific circumferential length and diameter of the first and second connecting rods 211 and 212 are set according to the physiological parameters of the specific fibula 10. The free end of the second link 212 is a closed end 2121 with a rounded chamfer to facilitate insertion of the nail shank 21 therethrough into the medullary canal 131 of the fibula 10.
The end cap 22 is disposed at the free end of the first link 211, and may be integrally formed with the first link 211 or may be screwed thereto. In this embodiment, the end cap 22 is integrally formed with the first link 211. In a cross section along the axis of the second link 212, the contour line of the end cap 22 is an isosceles trapezoid, and the upper base of the isosceles trapezoid is connected to the free end of the first link 211 and has a diameter corresponding to the diameter of the first link 211. The free end of the end cap 22 is provided with an installation groove 221, and the installation groove 221 is arranged along the radial direction of the end cap 22 and is used for connecting with an intramedullary nail installation tool. For fixation of the intramedullary nail mounting tool, an internal thread 222 is also provided in the through hole of the end cap 22. It is further noted that the intramedullary nail mounting tool is of the prior art, which is a standard tool commonly used and will not be described in detail here. In order to prevent the end cap 22 from rotating, the outer side wall of the end cap 22 is provided with a plurality of evenly distributed end cap locking teeth 223. When the intramedullary nail 20 is inserted into the fibula 10, the end cap 22 clamps in the lateral malleolus 12 of the fibula.
The rotation preventing portion 23 is disposed on an outer sidewall of the second link 212 and includes a plurality of locking teeth 231. Each of the locking teeth 231 extends along the axis of the second link 212 and is uniformly distributed around the axis of the second link 212. The contour line of the rotation preventing portion 23 is an isosceles trapezoid on a section along the axis of the second link 212, and the upper base of the isosceles trapezoid is closer to the free end of the second link 212 than the lower base. The contour line of the rotation preventing portion 23 is gear-shaped in a cross section perpendicular to the axis of the second link 212. In order to allow the end cap 22 to be clamped in the fibular lateral malleolus 12, the maximum diameter of the anti-rotation portion 23 should be smaller than that of the end cap 22, and the locking teeth 231 of the anti-rotation portion 23 and the locking teeth 223 of the end cap 22 have the same structure. Preferably, the contour of the rotation preventing part 23 on the cross section perpendicular to the axis of the second link 212 and the contour of the end cap 22 on the cross section perpendicular to the axis of the first link 211 may coincide with each other or be reduced in equal proportion, so that after the rotation preventing part 23 is inserted into the fibula lateral malleolus 12 first, the end cap 22 may completely coincide with the shape of the insertion hole formed by the rotation preventing part 23.
When the fibula/radius intramedullary nail 20 is installed, an intramedullary nail installing tool is firstly connected with the fibula/radius intramedullary nail 20 through the installing groove 221 and the internal thread 222 of the end cap 22, and then is inserted into the fibula medullary cavity 132 from the outer center of the lateral malleolus 12 of the fibula 10, and the nail can be driven in by using a hammer. While keeping the junction of the first and second links 211, 212 away from the fibular edge 131. Finally, the end cap 23 is clipped to the lateral malleolus 12 of the fibula to complete the installation of the fibular/radial intramedullary nail 20, and finally the installation tool is removed. Since the lateral wall of the fibula edge 131 is thin, the connection point of the first and second links 211, 212 should not abut against the lateral wall of the fibula edge 131 to prevent damage to the lateral wall. And because the central axes of the first and second connecting rods 211, 212 have a certain angle, the joint of the first and second connecting rods 211, 212 and the cortical bone generate extrusion friction, and then under the action of the anti-rotation part 23 and the end cap 22, the fixing effect of radial anti-rotation and axial anti-shortening is achieved.
Compared with the prior art, the fibula/radius intramedullary nail 20 is used for fixing the fractured fibula 10, can achieve the self-locking effect, does not need to be provided with fixing screws, is simple and common in required mounting tools, greatly reduces the number, and is simple and convenient to operate. Meanwhile, after the fibula/radius intramedullary nail 20 is inserted into the fibula 10, an external aiming device of the traditional intramedullary nail is not needed, so that the installation difficulty is reduced, the installation time is shortened, meanwhile, the fixation failure in the traditional locking mode is avoided, and the safety and the effectiveness are improved. In addition, since the fibular/radial intramedullary nail 20 only needs to be open at one end of the bone, damage to the skin and bone of the patient is reduced.
Please refer to fig. 3, which is a schematic structural diagram of a radius group 200 using a fibula/radius intramedullary nail according to a second embodiment of the present invention. In contrast to the first embodiment, only the bones used by the intramedullary nail are different, and the intramedullary nail is identical to the intramedullary nail 20 of the first embodiment. Thus, in the second embodiment, the fibular/radial intramedullary nail is still referenced using the reference numerals of the fibular/radial intramedullary nail 20 of the first embodiment.
The radius group 200 using the fibula/radius intramedullary nail includes a radius 30, and a fibula/radius intramedullary nail 20 inserted in the fibula 10.
The radius 30 is one of the two bones of the forearm, is located on the outer side of the forearm, is located on one side of the thumb, is divided into an integral body and two ends, and is one of the long bones of the forearm of humans and vertebrates (four feet). The radius wrap 30 includes a head 31, a styloid process 32, and a radius 33 connected between the head 31 and the styloid process 32. The head of the radius 31 is located at the upper end of the radius 30, and articulates with the small head of the humerus. The styloid process of the radial muscle 32 is located at the lower end of the radius 30, and is articulated with the proximal wrist. The radial body 33 has a medullary radial cavity 331 on the inside and a radial margin 332 on the outside. The radial flange 332 faces one side of the ulna and is recessed away from the ulna to increase the rotational travel and avoid interference when the forearm rotates. The detailed structure and operation of the radius 30 should be known to those skilled in the art, and will not be described herein.
When the fibula/radius intramedullary nail 20 is installed, the nail is inserted into the marrow cavity 331 through the approach of the radial styloid process 32, and the nail can be inserted by using a hammer to strike. While keeping the junction of the first and second links 211, 212 away from the radius margin 332. Finally, the end cap 23 is clipped onto the radial styloid process 32, thereby completing the installation of the fibular/radial intramedullary nail 20.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like within the spirit of the present invention are included in the scope of the appended claims.
Claims (8)
1. A fibula/radius intramedullary nail, characterized by: this fibula/radius intramedullary nail includes a nail pole, and a setting is in the end cap of nail pole one end, and one sets up prevent the rotation part on the nail pole lateral wall, the nail pole includes a first connecting rod and a second connecting rod of being connected with this first connecting rod, contained angle between the central axis of first connecting rod and second connecting rod is 170 degrees to 160 degrees between, the free end of second connecting rod is for having the closed end of round blunt chamfer, the end cap sets up the free end of first connecting rod, prevent that the rotation part sets up on the lateral wall of second connecting rod and include a plurality of calorie of teeth, each the calorie of teeth is followed the axis of second connecting rod extends, follows on the cross-section of the axis of second connecting rod the contour line of preventing the rotation part is isosceles trapezoid, and the last end ratio of such waist trapezoid is closer to the free end of second connecting rod, the maximum diameter of preventing the rotation part should be less than the maximum diameter of end cap, a plurality of calorie of preventing the tooth of rotation part use the axis of second connecting rod is evenly distributed as the central axis, the rotation part is in the perpendicular to the axis of second connecting rod can reduce the cross-section with the mutual ratio of preventing the axis of second connecting rod on the equal rotation part.
2. The fibular/radial intramedullary nail of claim 1, wherein: the first connecting rod and the second connecting rod are solid rods.
3. The fibular/radial intramedullary nail of claim 1, wherein: the circumferential length of the second connecting rod is greater than that of the first connecting rod, and the central axes of the first connecting rod and the second connecting rod are in the same plane.
4. The fibular/radial intramedullary nail of claim 1 wherein: on the section along the axis of the second connecting rod, the contour line of the end cap is an isosceles trapezoid, the upper bottom of the isosceles trapezoid is connected with the free end of the first connecting rod, and the diameter of the upper bottom of the isosceles trapezoid is equal to that of the first connecting rod.
5. A fibula group using a fibula/radius intramedullary nail, the fibula group comprising a fibula and a fibula/radius intramedullary nail inserted on the fibula, the fibula having a fibula lateral malleolus and a fibula connected with the fibula lateral malleolus, the fibula having a fibula cavity and a fibula border inside, characterized in that the fibula/radius intramedullary nail is inserted in the fibula cavity, the fibula/radius intramedullary nail comprises a nail stem, a end cap disposed at one end of the nail stem, and an anti-rotation portion disposed on a side wall of the nail stem, the nail stem comprises a first connecting rod and a second connecting rod connected with the first connecting rod, an included angle between central axes of the first connecting rod and the second connecting rod is 170 degrees to 160 degrees, free ends of the second connecting rod are closed ends with round chamfers, the end cap is disposed at free ends of the first connecting rod, the anti-rotation portion is disposed on a lateral wall of the second connecting rod and comprises a plurality of upper clamping tooth clamping axis lines, the free ends of the second connecting rod extend along an upper line of the fibula cavity and a lower clamping axis of the second connecting rod, and the anti-rotation portion is disposed on the lower clamping line of the second connecting rod.
6. The fibula set using a fibula/radius intramedullary nail of claim 5, wherein: the end cap is clamped in the lateral fibula malleolus.
7. A radius group using a fibula/radius intramedullary nail, the radius group having a radius and a fibula/radius intramedullary nail inserted on the radius, the radius having a radius styloid process and a radius body connected to the radius styloid process, the radius body having a radius medullary cavity inside and a radius margin, the radius group characterized in that the fibula/radius intramedullary nail is inserted in the radius medullary cavity, the fibula/radius intramedullary nail includes a nail stem, an end cap disposed at one end of the nail stem, and an anti-rotation portion disposed on a side wall of the nail stem, the nail stem includes a first connecting rod and a second connecting rod connected to the first connecting rod, an included angle between central axes of the first connecting rod and the second connecting rod is 170 degrees to 160 degrees, a free end of the second connecting rod is a closed end with a rounded chamfer, the nail stem is disposed at a free end of the first connecting rod, the anti-rotation portion is disposed on an upper side wall of the second connecting rod and includes a plurality of upper radial clamping end lines and a lower clamping end line extending along a trapezoid of the lower side of the second connecting rod, and the lower clamping end of the second connecting rod is disposed on the lower clamping line.
8. The radius group using a fibula/intramedullary nail of claim 7, wherein: the endcap is clamped in the radial styloid process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620710.8A CN107198562B (en) | 2017-07-27 | 2017-07-27 | Fibula/radius intramedullary nail and fibula group and radius group using intramedullary nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710620710.8A CN107198562B (en) | 2017-07-27 | 2017-07-27 | Fibula/radius intramedullary nail and fibula group and radius group using intramedullary nail |
Publications (2)
| Publication Number | Publication Date |
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| CN107198562A CN107198562A (en) | 2017-09-26 |
| CN107198562B true CN107198562B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710620710.8A Active CN107198562B (en) | 2017-07-27 | 2017-07-27 | Fibula/radius intramedullary nail and fibula group and radius group using intramedullary nail |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2712293Y (en) * | 2004-04-26 | 2005-07-27 | 彭义德 | Self-locking intramedullary nail with rotary arm |
| CN203598030U (en) * | 2013-11-07 | 2014-05-21 | 陈军 | Radius interlocking intramedullary nail |
| CN105997213A (en) * | 2016-06-22 | 2016-10-12 | 苏州吉美瑞医疗器械有限公司 | Auto-locking intramedullary nail for thighbone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1675514B1 (en) * | 2003-10-21 | 2010-03-31 | Synthes GmbH | Intramedullary nail |
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2017
- 2017-07-27 CN CN201710620710.8A patent/CN107198562B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2712293Y (en) * | 2004-04-26 | 2005-07-27 | 彭义德 | Self-locking intramedullary nail with rotary arm |
| CN203598030U (en) * | 2013-11-07 | 2014-05-21 | 陈军 | Radius interlocking intramedullary nail |
| CN105997213A (en) * | 2016-06-22 | 2016-10-12 | 苏州吉美瑞医疗器械有限公司 | Auto-locking intramedullary nail for thighbone |
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| CN107198562A (en) | 2017-09-26 |
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