CN216090944U - Spiral bionic metacarpal prosthesis - Google Patents
Spiral bionic metacarpal prosthesis Download PDFInfo
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- CN216090944U CN216090944U CN202121455616.XU CN202121455616U CN216090944U CN 216090944 U CN216090944 U CN 216090944U CN 202121455616 U CN202121455616 U CN 202121455616U CN 216090944 U CN216090944 U CN 216090944U
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Abstract
The utility model relates to the technical field of medical prosthesis, and provides a spiral bionic metacarpal prosthesis. The method comprises the following steps: metacarpal head, metacarpal neck and metacarpal handle; the metacarpal head is rotatably connected with the metacarpal neck, and the metacarpal neck is detachably and fixedly connected with the metacarpal handle; the palm bone is provided with a holder, and the upper surface of the holder is provided with a spiral structure. The utility model has the beneficial effects that: the metacarpal head can be screwed into most of the hornbones through the spiral structure, so that the metacarpal head is firmly fixed, the anti-pull-out effect is achieved, and the metacarpal head can be effectively prevented from falling off; the instrument tool is used for holding the holder hole in the metacarpal bone, so that the metacarpal bone is smoothly screwed into the trapezium under better stress, the prosthesis is conveniently installed in the operation, the operation time is shortened, and the injury degree of a patient is reduced.
Description
Technical Field
The utility model relates to the technical field of medical prosthesis, in particular to a spiral bionic metacarpal prosthesis.
Background
When the natural joint loses all or part of the function due to surface abrasion or injury or damage, the artificial joint needs to be inserted to replace the function defect of the joint, and the artificial joint replacement is widely applied at present, which brings hope to patients with joint diseases.
Chinese patent CN210843637U discloses a trans-wrist joint prosthesis, and particularly relates to the technical field of medical instruments. The trans-wrist joint prosthesis provided by the utility model changes the ball-and-socket relationship of the traditional wrist joint prosthesis by designing the radius assembly, the movable ball body and the metacarpal assembly, so that the rotation center is closer to the near end, the moment of the wrist joint is lengthened, the normal physiological structure of a human body is better met, the wrist joint can move freely, the trans-wrist joint can deepen the wrist joint socket under the condition of ensuring the height of the whole joint to be unchanged, the trans-wrist joint is not easy to take off relative to the traditional wrist joint, the prosthesis is fixed in a mode of bone ingrowth, and more room is left for later-stage joint revision.
In the prior art, the bionic metacarpal prosthesis is mostly used as a part of a wrist joint, and is lack of an independent design, so that the treatment effect of joint replacement surgery is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a spiral bionic metacarpal prosthesis to solve the technical problems in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that: a spiral biomimetic metacarpal prosthesis comprising: metacarpal head, metacarpal neck and metacarpal handle; the metacarpal head is rotatably connected with the metacarpal neck, and the metacarpal neck is detachably and fixedly connected with the metacarpal handle; the palm bone is internally provided with a holder, the upper surface of the holder is provided with a spiral structure, and the spiral structure is driven by the holder to rotate and screw into the angle bone of a patient.
In an alternative embodiment, the holder is a circular disk-shaped body having a certain thickness, a plurality of holder holes are symmetrically arranged along the circular disk-shaped body, and the auxiliary operating instrument extends into the plurality of holder holes.
In an alternative embodiment, the number of the holder holes is 4, and each holder hole is a circular through hole.
In an optional embodiment, a ball head is arranged on the lower surface of the holder.
In an alternative embodiment, the top of the helix is planar.
In an alternative embodiment, the main body of the metacarpal neck has an arc-shaped outer surface, the surface of the main body of the metacarpal neck is downwards provided with a ball socket surface, and the ball head is matched with the ball socket surface in a sliding way.
In an alternative embodiment, the maximum angle of motion of the ball head to the ball socket surface is 110 °.
In an optional embodiment, the lower surface of the main body of the metacarpal neck is a plane, and the lower surface of the main body of the metacarpal neck is provided with an external cone structure.
In an alternative embodiment, the upper surface of the metacarpal handle is internally provided with an inner cone, and the outer cone structure is in press fit engagement with the inner cone.
In an optional embodiment, the outer surface of the main body of the metacarpal handle is sprayed with active factors, the whole main body of the metacarpal handle is a triangular surface, and the triangular surface is provided with a curvature.
The utility model has the beneficial effects that:
(1) the spiral bionic metacarpal prosthesis has the advantages that the spiral structure is arranged in the metacarpal head, can be screwed into most of the hornbones to firmly fix the metacarpal head, has an anti-pull-out effect, and can effectively prevent the metacarpal head from falling off; the instrument tool is used for holding the holder hole in the metacarpal bone, so that the metacarpal bone is smoothly screwed into the trapezium under better stress, the prosthesis is conveniently installed in the operation, the operation time is shortened, and the injury degree of a patient is reduced.
(2) The ball head 13 in the metacarpal head of the spiral bionic metacarpal prosthesis adopts a spherical structure and is matched with the ball socket surface in the metacarpal neck, so that the mobility of the metacarpal joint prosthesis is greatly improved; the outer cone in the metacarpal neck is matched with the inner cone in the metacarpal handle, and the structure increases along with the pressure, so that the matching compactness is higher, the stability of the joint part is improved, and the safety of the prosthesis is improved.
(3) Active factors are sprayed on the surface of the metacarpal handle of the spiral bionic metacarpal prosthesis, so that the growth of sclerotin is greatly promoted, the metacarpal prosthesis is better fused in a metacarpal medullary cavity, and the later-period stability of the prosthesis is improved; set up the triangular face in the metacarpal handle, implant the intramedullary canal, have fine anti-rotation nature, further improve the stability of false body, and the curvature that triangular face had, this curvature accords with the physiological radian of metacarpal medullary canal, promotes the degree of adaptability of false body and human metacarpal medullary canal radian greatly, and metacarpal false body activity does not have the sense of difference with human self metacarpal joint activity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is an assembly structure diagram of a spiral bionic metacarpal prosthesis according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a metacarpal bone of the spiral bionic metacarpal prosthesis according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a metacarpal neck in the spiral bionic metacarpal prosthesis according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a metacarpal stem of the spiral bionic metacarpal prosthesis according to an embodiment of the present invention.
Wherein, the reference numbers in the figures are: 1-metacarpal head; 11-a helical structure; 12-a holder bore; 13-a ball head; 2-metacarpal neck; 21-a ball and socket surface; 22-outer cone structure; 3-metacarpal stem; 31-inner cone; 32-triangular face.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Example one
Referring to fig. 1-4, the present embodiment provides a spiral bionic metacarpal prosthesis, including: a metacarpal head 1, a metacarpal neck 2 and a metacarpal handle 3; wherein, the metacarpal head 1 is rotatably connected with the metacarpal neck 2, and the metacarpal neck 2 is detachably and fixedly connected with the metacarpal handle 3.
Specifically, the metacarpal head 1 is provided with a holder, the upper surface of the holder is provided with a spiral structure 11, and in the embodiment, the top of the spiral structure 11 is a plane. The holder drives the spiral structure 11 to rotate and screw into the patient's angle bone, and the spiral structure 11 is different from the common national standard thread and has a larger thread pitch. The spiral structure 11 is arranged in the metacarpal head 1 and can be screwed into most of the hornbones to firmly fix the metacarpal head 1, so that the anti-pull-out effect is achieved, and the metacarpal head 1 can be effectively prevented from falling off; the instrument tool is used for holding the holder hole in the metacarpal bone, so that the metacarpal bone is smoothly screwed into the trapezium under better stress, the prosthesis is conveniently installed in the operation, the operation time is shortened, and the injury degree of a patient is reduced.
Further, the holder is a circular disk-shaped body having a certain thickness, 4 holder holes 12 are symmetrically arranged along the circular disk-shaped body, and the auxiliary operating instrument is inserted into the plurality of holder holes 12, and preferably, each of the holder holes 12 is a circular through hole.
In addition, the lower surface of the holder is provided with a ball head 13; the main body of the metacarpal neck 2 is provided with an arc-shaped outer surface, the surface of the main body of the metacarpal neck 2 is downwards provided with a ball socket surface 21, the ball head 13 is matched with the ball socket surface 21 in a sliding way, the ball head 13 is matched with the ball socket surface 21 in the metacarpal neck 2, the mobility of the metacarpal joint prosthesis is greatly improved, and the maximum movement angle of the ball head 13 and the ball socket surface 21 can reach 110 degrees through the structure.
In this embodiment, the upper and lower surfaces of the main body of the metacarpal neck 2 are flat surfaces, and the lower surface of the main body of the metacarpal neck 2 is provided with an external cone structure 22. The inner cone 31 is arranged in the upper surface of the metacarpal handle 3, the outer cone structure 22 is assembled with the inner cone 31 in a pressing mode, the structure is increased along with pressure, the matching compactness is larger, the stability of a joint part is improved, and therefore the safety of the prosthesis is improved.
Finally, the active factors are sprayed on the outer surface of the main body of the metacarpal handle 3, so that the growth of sclerotin is greatly promoted, the metacarpal prosthesis is better fused in a metacarpal medullary cavity, and the later-period stability of the prosthesis is improved. The whole main part of metacarpal stem 3 is triangular face 32, and metacarpal stem 3 who is provided with triangular face 32 implants the intramedullary canal, has fine anti-rotation nature, further improves the stability of false body, and the curvature that triangular face 32 has, and this curvature accords with the physiological radian in metacarpal intramedullary canal, promotes the degree of adaptability of false body and human metacarpal intramedullary canal radian greatly, and metacarpal false body activity does not have the sense of difference with human self metacarpal joint activity.
Example two
Referring to fig. 1-4, the present embodiment provides a spiral bionic metacarpal prosthesis, including: a metacarpal head 1, a metacarpal neck 2 and a metacarpal handle 3; wherein, the metacarpal head 1 is rotatably connected with the metacarpal neck 2, and the metacarpal neck 2 is detachably and fixedly connected with the metacarpal handle 3.
Specifically, the holding device is arranged in the metacarpal head 1, the upper surface of the holding device is provided with the spiral structure 11, in the embodiment, the top of the spiral structure 11 is a thread tip with a smaller pitch, and the lower part of the spiral structure is a thread structure with a larger pitch, so that a stepped thread structure is formed. The holder drives the spiral structure 11 to rotate and screw into the patient's angle bone, and the spiral structure 11 is the same as the common national standard thread, and has a larger thread pitch. The spiral structure 11 is arranged in the metacarpal head 1 and can be screwed into most of the hornbones to firmly fix the metacarpal head 1, so that the anti-pull-out effect is achieved, and the metacarpal head 1 can be effectively prevented from falling off; the instrument tool is used for holding the holder hole in the metacarpal bone, so that the metacarpal bone is smoothly screwed into the trapezium under better stress, the prosthesis is conveniently installed in the operation, the operation time is shortened, and the injury degree of a patient is reduced.
Further, the holder is a circular disk-shaped body having a certain thickness, 6 holder holes 12 are symmetrically arranged along the circular disk-shaped body, and the auxiliary operating device is inserted into the plurality of holder holes 12, and preferably, each of the holder holes 12 is a square through hole.
In addition, the lower surface of the holder is provided with a ball head 13; the main body of the metacarpal neck 2 is provided with an arc-shaped outer surface, the surface of the main body of the metacarpal neck 2 is downwards provided with a ball socket surface 21, the ball head 13 is matched with the ball socket surface 21 in a sliding way, the ball head 13 is matched with the ball socket surface 21 in the metacarpal neck 2, the mobility of the metacarpal joint prosthesis is greatly improved, and the maximum movement angle of the ball head 13 and the ball socket surface 21 can reach 110 degrees through the structure.
In this embodiment, the lower surface of the main body of the metacarpal neck 2 is a plane, and the outer cone structure 22 is disposed on the lower surface of the main body of the metacarpal neck 2. The inner cone 31 is arranged in the upper surface of the metacarpal handle 3, the outer cone structure 22 is assembled with the inner cone 31 in a pressing mode, the structure is increased along with pressure, the matching compactness is larger, the stability of a joint part is improved, and therefore the safety of the prosthesis is improved.
Finally, the active factors are sprayed on the outer surface of the main body of the metacarpal handle 3, so that the growth of sclerotin is greatly promoted, the metacarpal prosthesis is better fused in a metacarpal medullary cavity, and the later-period stability of the prosthesis is improved. The whole main part of metacarpal stem 3 is triangular face 32, and metacarpal stem 3 who is provided with triangular face 32 implants the intramedullary canal, has fine anti-rotation nature, further improves the stability of false body, and the curvature that triangular face 32 has, and this curvature accords with the physiological radian in metacarpal intramedullary canal, promotes the degree of adaptability of false body and human metacarpal intramedullary canal radian greatly, and metacarpal false body activity does not have the sense of difference with human self metacarpal joint activity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A spiral biomimetic metacarpal prosthesis comprising: a metacarpal head (1), a metacarpal neck (2) and a metacarpal handle (3); wherein the metacarpal head (1) is rotationally connected with the metacarpal neck (2), and the metacarpal neck (2) is detachably and fixedly connected with the metacarpal handle (3);
the metacarpal head fixing device is characterized in that a holder is arranged in the metacarpal head (1), a spiral structure (11) is arranged on the upper surface of the holder, and the spiral structure (11) is driven by the holder to rotate and screw into the ossicle of a patient.
2. The spiral biomimetic metacarpal prosthesis according to claim 1, wherein the holder is a circular disk-shaped body having a certain thickness, a plurality of holder holes (12) are symmetrically arranged along the circular disk-shaped body, and the auxiliary operating instrument is inserted into the plurality of holder holes (12).
3. The spiral biomimetic metacarpal prosthesis according to claim 2, wherein the number of the holder holes (12) is 4, and each of the holder holes (12) is a circular through hole.
4. The spiral biomimetic metacarpal prosthesis according to claim 1, characterized in that a ball head (13) is provided on a lower surface of the holder.
5. The spiral biomimetic metacarpal prosthesis according to claim 1, characterized in that the top of the spiral structure (11) is a plane.
6. The screw-type biomimetic metacarpal prosthesis according to claim 4, characterized in that the main body of the metacarpal neck (2) has an arc-shaped outer surface, the surface of the main body of the metacarpal neck (2) is provided with a ball and socket surface (21) downwards, and the ball head (13) is slidably assembled with the ball and socket surface (21).
7. The spiral biomimetic metacarpal prosthesis according to claim 6, characterized in that the maximum angle of motion of the ball head (13) to the ball socket surface (21) is 110 °.
8. The spiral biomimetic metacarpal prosthesis according to claim 7, characterized in that the lower surface of the main body of the metacarpal neck (2) is a plane, and the lower surface of the main body of the metacarpal neck (2) is provided with an outer cone structure (22).
9. The spiral-type biomimetic metacarpal prosthesis according to claim 8, characterized in that an inner cone (31) is disposed inwardly of the upper surface of the metacarpal stem (3), and the outer cone structure (22) is press-fitted into the inner cone (31).
10. The spiral bionic metacarpal prosthesis according to claim 1, wherein the outer surface of the main body of the metacarpal handle (3) is coated with active factors, the main body of the metacarpal handle (3) is integrally triangular (32), and the triangular (32) is provided with curvature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455616.XU CN216090944U (en) | 2021-06-29 | 2021-06-29 | Spiral bionic metacarpal prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121455616.XU CN216090944U (en) | 2021-06-29 | 2021-06-29 | Spiral bionic metacarpal prosthesis |
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| Publication Number | Publication Date |
|---|---|
| CN216090944U true CN216090944U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121455616.XU Active CN216090944U (en) | 2021-06-29 | 2021-06-29 | Spiral bionic metacarpal prosthesis |
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| CN (1) | CN216090944U (en) |
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- 2021-06-29 CN CN202121455616.XU patent/CN216090944U/en active Active
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