CN217772595U - Artificial wrist joint surface replacement prosthesis - Google Patents
Artificial wrist joint surface replacement prosthesis Download PDFInfo
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- CN217772595U CN217772595U CN202122097486.3U CN202122097486U CN217772595U CN 217772595 U CN217772595 U CN 217772595U CN 202122097486 U CN202122097486 U CN 202122097486U CN 217772595 U CN217772595 U CN 217772595U
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Abstract
The utility model relates to an artificial wrist joint surface replacement prosthesis, include: a prosthesis for placement at a distal radius end and a fixation plate for fixation to the radial shaft; wherein the prosthesis is matched with the shape of the distal radius, and the prosthesis comprises an articular surface and a base; the fixed steel plate is fixedly connected with the base of the prosthesis. The artificial wrist joint surface replacement prosthesis of the utility model abandons the shank insertion fixing mode of the traditional wrist joint prosthesis, does not need to expand the medullary cavity of the radius bone, only needs to cut off certain bone at the joint surface part with damaged radius to match the prosthesis, can reserve the bone mass at the wrist joint to the maximum extent, greatly reduces the damage to the bone mass of the non-joint surface, and can avoid serious complications such as deep infection caused by the shank going deep into the medullary cavity after the operation; the fixed steel plate has certain plasticity and is more stable in fixation.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to an artificial wrist joint surface replacement false body.
Background
The wrist joint is one of the most complex and frequently used joints in the human body, and various degenerative arthritis, rheumatic and rheumatoid arthritis, trauma, tumor and the like can cause severe damage to the wrist joint, which causes severe pain and functional loss of the wrist joint. The existing treatment mainly involves partial or complete fusion of the wrist joint, and the function of the wrist joint is sacrificed. Wrist joint replacement, which can maximally preserve the function of the wrist joint while relieving pain, is gradually becoming a appeal for such patients.
Most of the existing artificial wrist joint prostheses are full wrist joint replacement prostheses, soft tissues around the wrist joint can be widely stripped in the prosthesis replacement process, and the wounds are large; the existing wrist joint prosthesis generally comprises a handle part and a joint end, an intramedullary prosthesis handle and bone cement are adopted for fixing, the bone cutting and the marrow reaming are carried out in the operation, so that the bone mass is lost, and the problems of prosthesis loosening, sinking, fracture, dislocation, fracture around the prosthesis and the like are easy to occur after the operation; meanwhile, the intramedullary prosthesis may cause serious complications such as deep infection of the medullary cavity.
Therefore, the development of a novel wrist joint replacement prosthesis has important clinical significance and application prospect for treating the diseases.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior art and providing an artificial wrist joint surface replacement prosthesis, which solves the problem of bone loss caused by extensive stripping of soft tissues around the wrist joint, bone cutting, marrow expanding and other operations in the prosthesis replacement process; prosthesis loosening caused by insertion of the prosthesis is avoided; reducing the incidence of deep infections resulting from manipulation within the medullary cavity.
In order to realize the purpose, the utility model adopts the technical proposal that:
there is provided an artificial wrist resurfacing prosthesis comprising: a prosthesis for being disposed at a distal end of a radius and a fixing steel plate for being fixed to a radial shaft;
wherein the prosthesis is matched with the shape of the distal radius, and the prosthesis comprises an articular surface and a base; the fixed steel plate is fixedly connected with the base of the prosthesis.
Preferably, the outer contact surface of the prosthesis is a smooth surface.
Preferably, the inner contact surface of the prosthesis is a grainy surface.
Preferably, the articular surface is a hollow structure.
Preferably, the articular surface is made of high molecular polyethylene.
Preferably, the base is made of a titanium alloy or a cobalt chromium molybdenum alloy.
Preferably, the fixing steel plate is provided with a plurality of fixing holes.
Preferably, the fixing steel plate is made of a titanium alloy or a cobalt-chromium-molybdenum alloy.
The utility model adopts the above technical scheme, compare with prior art, have following technological effect:
the artificial wrist joint surface replacement prosthesis of the utility model abandons the shank insertion fixing mode of the traditional wrist joint prosthesis, does not need to expand the medullary cavity of the radius bone, only needs to cut off certain bone at the joint surface part with damaged radius to match the prosthesis, can reserve the bone mass at the wrist joint to the maximum extent, greatly reduces the damage to the bone mass of the non-joint surface, and can avoid serious complications such as deep infection caused by the shank going deep into the medullary cavity after the operation; the fixed steel plate has certain plasticity and is more stable in fixation.
Drawings
FIG. 1 is a schematic structural view of the artificial wrist joint resurfacing prosthesis of the present invention;
FIG. 2 is a schematic side view of a structural cross-sectional view of the artificial wrist joint resurfacing prosthesis of the present invention;
wherein the reference numerals include: an articular surface 1; a base 2; a fixed steel plate 3; and a fixing hole 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Examples
1-2, the present embodiment provides an artificial wrist resurfacing prosthesis comprising: a prosthesis for being disposed at a distal end of a radius and a fixing steel plate 3 for being fixed to a radial shaft;
wherein the prosthesis is matched with the shape of the distal radius, and comprises an articular surface 1 and a base 2; the outer contact surface of the prosthesis is a smooth surface and is in contact with the joint surface of the proximal carpal row bone, so that joint movement is facilitated; the inner contact surface of the prosthesis is a granular surface, so that the contact area of the contact surface and the bone surface can be increased; the joint surface 1 is of a hollow structure, the joint surface 1 is made of high-molecular polyethylene, and the base 2 is made of titanium alloy or cobalt-chromium-molybdenum alloy;
the fixing steel plate 3 is fixedly connected with the base 2 of the prosthesis, a plurality of fixing holes 4 are formed in the fixing steel plate 3, and the fixing steel plate 3 is made of titanium alloy or cobalt-chromium-molybdenum alloy.
When the artificial wrist joint surface replacement prosthesis is used, the distal radius osteotomy is firstly carried out, the prosthesis part of the artificial wrist joint surface replacement prosthesis is embedded in the distal radius bone surface after the osteotomy, which is equivalent to replacing the joint surface part at the distal radius, so that the biomechanical characteristics of the wrist joint are basically kept unchanged. The inner contact surface of the prosthesis part, which is in contact with the bone surface, is a frosted fine granular surface, so that the contact area of the contact surface and the bone surface is increased, and the surface friction is increased, so that the prosthesis is not easy to slip; and (3) molding the fixing steel plate, attaching the fixing steel plate to the radius, and driving fixing screws into fixing holes of the fixing steel plate, so that the prosthesis part is firmly fixed with the far end of the radius through the fixing steel plate.
To sum up, compared with the existing total wrist joint replacement prosthesis, the artificial wrist joint surface replacement prosthesis of the utility model only replaces the joint part at the far end of the radius, retains the ligament around the wrist joint, and furthest retains the integrity of the bone structure of the limb, thereby avoiding the damage of the stability of the wrist joint and reducing the possibility of the fracture of the radius;
the prosthesis part placed at the far end of the radius of the utility model can be effectively fixed at the far end of the radius through the fixing steel plate, and the inner contact surface of the prosthesis is a frosted fine granular surface, so that the contact area between the prosthesis sleeve and the far end of the radius can be increased, and the possibility of prosthesis loosening at a long term is reduced;
the utility model does not operate in the marrow cavity in the using process, thereby effectively reducing the occurrence probability of deep infection.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (8)
1. An artificial wrist resurfacing prosthesis, comprising: a prosthesis for being disposed at a distal end of a radius and a fixing steel plate (3) for being fixed to a radial shaft;
wherein the prosthesis is matched with the shape of the distal radius, and comprises an articular surface (1) and a base (2); the fixed steel plate (3) is fixedly connected with the base (2) of the prosthesis.
2. The artificial wrist resurfacing prosthesis of claim 1, wherein the outer contact surface of the prosthesis is a smooth surface.
3. The artificial wrist surface replacement prosthesis of claim 1, wherein the inner contact surface of the prosthesis is a grainy surface.
4. The artificial wrist resurfacing prosthesis according to claim 1, characterized in that said articular surface (1) is of hollow structure.
5. The artificial wrist resurfacing prosthesis according to claim 1, characterized in that said articular surface (1) is made of high molecular polyethylene.
6. The artificial wrist resurfacing prosthesis according to claim 1, characterized in that said base (2) is made of titanium alloy or cobalt chromium molybdenum alloy.
7. The artificial wrist joint resurfacing prosthesis according to claim 1, wherein the fixing steel plate (3) is provided with a plurality of fixing holes (4).
8. The artificial wrist resurfacing prosthesis according to claim 1, characterized in that said fixing steel plate (3) is made of titanium alloy or cobalt chromium molybdenum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122097486.3U CN217772595U (en) | 2021-09-01 | 2021-09-01 | Artificial wrist joint surface replacement prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122097486.3U CN217772595U (en) | 2021-09-01 | 2021-09-01 | Artificial wrist joint surface replacement prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217772595U true CN217772595U (en) | 2022-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122097486.3U Active CN217772595U (en) | 2021-09-01 | 2021-09-01 | Artificial wrist joint surface replacement prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217772595U (en) |
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2021
- 2021-09-01 CN CN202122097486.3U patent/CN217772595U/en active Active
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