CN210843637U - Trans-wrist joint prosthesis - Google Patents
Trans-wrist joint prosthesis Download PDFInfo
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- CN210843637U CN210843637U CN201921601926.0U CN201921601926U CN210843637U CN 210843637 U CN210843637 U CN 210843637U CN 201921601926 U CN201921601926 U CN 201921601926U CN 210843637 U CN210843637 U CN 210843637U
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- wrist
- bone
- radius
- wrist joint
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- 210000000988 bone and bone Anatomy 0.000 claims abstract description 75
- 210000003857 wrist joint Anatomy 0.000 claims abstract description 67
- 210000000236 metacarpal bone Anatomy 0.000 claims abstract description 11
- 210000000707 wrist Anatomy 0.000 claims description 64
- 210000001185 bone marrow Anatomy 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 3
- MTHLBYMFGWSRME-UHFFFAOYSA-N [Cr].[Co].[Mo] Chemical compound [Cr].[Co].[Mo] MTHLBYMFGWSRME-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000000602 vitallium Substances 0.000 claims description 3
- 210000003010 carpal bone Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009916 joint effect Effects 0.000 abstract description 3
- 230000035479 physiological effects, processes and functions Effects 0.000 abstract description 2
- 238000009418 renovation Methods 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 4
- 206010028980 Neoplasm Diseases 0.000 description 3
- 208000004575 Infectious Arthritis Diseases 0.000 description 2
- 206010028851 Necrosis Diseases 0.000 description 2
- 206010048873 Traumatic arthritis Diseases 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 208000020084 Bone disease Diseases 0.000 description 1
- 208000000094 Chronic Pain Diseases 0.000 description 1
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 241001653121 Glenoides Species 0.000 description 1
- 206010031264 Osteonecrosis Diseases 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003797 carpal joint Anatomy 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 230000002124 endocrine Effects 0.000 description 1
- 208000030172 endocrine system disease Diseases 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 208000026278 immune system disease Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 230000000010 osteolytic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 206010039073 rheumatoid arthritis Diseases 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 210000001258 synovial membrane Anatomy 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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Abstract
The utility model discloses a trans wrist joint prosthesis, in particular to the technical field of medical instruments. The utility model provides a trans wrist joint false body through design radius subassembly, activity spheroid, metacarpal bone subassembly, has overturned traditional wrist joint false body's ball socket relation, makes the center of rotation more be close to the near-end, has lengthened wrist joint's moment, more accords with human normal physiology structure, makes wrist joint's activity more freely, trans wrist joint is guaranteeing under the circumstances that whole joint height is unchangeable, can deepen wrist joint nest, more difficult taking off for traditional wrist joint, the fixed mode of false body is grown into for the bone, leaves more leeway for later stage joint renovation.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to trans wrist joint false body.
Background
The wrist joint is one of the most important and flexible joints of the human body, for the diseases of serious comminuted fracture of the wrist joint composition bone, traumatic arthritis of the wrist joint, lesion necrosis of the cartilage of the wrist joint, necrosis and collapse of the wrist bone, osteolytic osteonecrosis caused by primary and secondary bone diseases of the wrist joint, synovial membrane and bone destruction of the wrist joint caused by various endocrine and immune system diseases, degenerative carpal arthritis, tumors of the wrist joint and the like, the radial wrist joint can do bending, stretching, expanding, contracting and circumversion motions, the wrist joint is the most complex joint of the human body, and chronic pain and function loss of the wrist joint can be caused by a plurality of diseases or wounds, for example, rheumatoid arthritis, traumatic arthritis, osteoarthritis, suppurative arthritis, tumor, wrist joint, etc., the current treatment methods mainly comprise wrist joint fusion, lunar extraction tendon stuffing and artificial wrist joint prosthesis to replace joint movement.
The problems of the prior wrist joint prosthesis are as follows:
1. the mounting and fixing accuracy of the wrist joint prosthesis is not high, and the wrist joint prosthesis needs to be matched with the bone cutting position during mounting, so that the wrist joint prosthesis is easy to generate excessive wear and bone absorption nowadays.
2. The contact movement of the sphere surface of the wrist joint prosthesis movable sphere and the radius leads to the limited range of the wrist movement and can not completely accord with the manual and physical study.
3. The traditional carpal joint prosthesis socket is easy to dislocate, and the fixing mode makes later-stage joint revision difficult.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem to prior art exists, the utility model provides a trans wrist joint false body through design radius subassembly, activity spheroid, metacarpal bone subassembly, has solved wrist joint false body installation accuracy and has hanged down, and wrist home range is limited, the easy problem that drops of false body.
In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:
a trans-wrist joint prosthesis comprises a radius component, a movable ball body and a metacarpal bone component, and is characterized in that: the radius assembly is formed by connecting a radius handle with a radius platform, the radius handle is a needle-shaped bulge, the bulge can be inserted into a radius medullary cavity to be fixed in a patient body, the radius platform is in a round table shape with the area of an upper end circle larger than that of a lower end circle, a press-fit bolt is connected to the upper end face of the radius platform, the movable sphere is an elliptical hemisphere cut along the diameter of the sphere, a groove matched with the press-fit bolt is formed in the movable sphere, and the groove can be inserted into the press-fit bolt to fix the movable sphere on the radius assembly;
the metacarpal bone assembly is composed of a wrist joint nest and a wrist bone platform, the lower end face of the wrist joint nest is an inwards concave spherical surface matched with the upper surface of the movable sphere, a wrist bone screw hole is formed in the middle position of the upper end inside the wrist joint nest, two movable holes are formed in the two sides of the ulnar radius of the wrist bone platform respectively, one end of a universal ball is connected to the bottom end in each movable hole, the other end of the universal ball is connected with the wrist bone screw hole, the wrist bone screw hole can be inserted into one end of a femoral screw, the end of the wrist bone screw can move in each movable hole, the wrist bone screw is inserted into the wrist bone screw hole to connect and fix the wrist bone platform on the wrist joint nest, and the middle position of the wrist bone platform.
Furthermore, the carpal shaft is fixed in the third metacarpal bone of the patient through punching, reaming and skull bone.
Furthermore, the diameter of the threaded hole of the carpal screw is 3.5mm, and the carpal screw can be screwed in to the far end through the threaded hole of the carpal screw and fixed on the carpal platform.
The wrist bone joint socket is made of cobalt-chromium-molybdenum alloy, a transverse pin screw hole is formed in the wrist bone joint socket, and a transverse pin can be inserted into the transverse pin screw hole and penetrates through the wrist bone joint socket and the wrist bone pin bolt to be fixedly connected.
The radius handle is inserted into the cavity of the radius bone marrow of a patient through punching and marrow enlargement, the surface of the radius handle is provided with a granular cobalt-chromium-molybdenum metal coating, and the radius handle is fixed in the cavity of the radius bone marrow of the patient in a bone ingrowth mode.
The movable sphere is made of ultra-high molecular polyethylene, and the surface of the movable sphere is a polished spherical surface, so that the friction between the surface of the movable sphere and the lower surface of the ball socket assembly is reduced, and the service life of the device is prolonged.
The wrist platform is rotatable about the radius assembly.
The utility model discloses beneficial effect: the utility model discloses a trans wrist joint false body through design radius subassembly, activity spheroid, metacarpal bone subassembly, has overturned traditional wrist joint false body's ball socket relation, makes the center of rotation more be close to the near-end, has lengthened wrist joint's moment, more accords with human normal physiology structure, makes wrist joint's activity more freely, trans wrist joint is guaranteeing under the circumstances that whole joint height is unchangeable, can deepen wrist joint nest, more difficult taking off for traditional wrist joint, the fixed mode of false body is grown into for the bone, leaves more leeway for later stage joint renovation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a trans-wrist prosthesis according to the present invention;
FIG. 2 is a cross-sectional view of the movable ball and metacarpal assembly of the present invention;
1-carpal stem, 2-carpal platform, 3-carpal screw, 4-carpal glenoid fossa, 5-carpal pin bolt, 6-transverse pin, 7-movable sphere, 8-press-fit bolt, 9-radius platform, 10-radius stem, 11-radius component, 12-metacarpal component, 13-movable hole, 14-transverse pin screw hole, 15-groove, 16-carpal bone bolt-removing screw hole, 17-carpal screw hole and 18-universal ball.
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.
As shown in fig. 1 and 2
A trans-wrist joint prosthesis comprises a radius component 11, a movable ball 7 and a metacarpal component 12, and is characterized in that: the radius assembly 12 is formed by connecting a radius handle 10 with a radius platform 9, the radius handle 10 is a needle-shaped bulge, the bulge can be inserted into a radius medullary cavity to be fixed in a patient body, the radius platform 9 is in a circular truncated cone shape with the area of an upper end circle larger than that of a lower end circle, a press-fit bolt 8 is connected to the upper end face of the radius platform 9, the movable sphere 7 is an oval hemisphere cut along the diameter of the sphere, a groove 15 matched with the press-fit bolt 8 is arranged inside the movable sphere, and the groove 15 can be inserted into the press-fit bolt 8 to fix the movable sphere 7 on the radius assembly 11;
the metacarpal bone component 12 is composed of a wrist joint nest 4 and a wrist bone platform 2, the lower end face of the wrist joint nest 4 is an inwards concave spherical surface matched with the upper surface of the movable ball 7, a wrist bone screw hole 16 is formed in the middle position of the upper end inside the wrist joint nest 4, two movable holes 13 are formed in the positions of two sides of the ulnar radius of the wrist bone platform 2 respectively, one end of a universal ball 18 is connected to the bottom end in each movable hole, the other end of the universal ball 18 is connected with a wrist bone screw hole 17, one end of a femoral screw 3 can be inserted into the wrist bone screw hole 17, the end of the wrist bone screw 3 can move in each movable hole 13, the wrist bone screw 3 is inserted into the wrist bone screw hole 16 to connect and fix the wrist bone platform on the wrist joint nest 4, and the middle position of the wrist bone platform 2.
Further, the wrist bone handle 1 is fixed in the third metacarpal bone of the patient through punching, reaming and head bone.
Further, the diameter of the wrist bone screw threaded hole 13 is 3.5mm, and the wrist bone screw 3 can be screwed in and fixed on the wrist bone platform through the wrist bone screw threaded hole 13 towards the far end.
The wrist bone joint socket 4 is made of cobalt-chromium-molybdenum alloy, the wrist bone joint socket 4 is provided with a transverse pin screw hole 13, and a transverse pin 6 can be inserted into the transverse pin screw hole 13 and penetrates through the wrist bone joint socket 4 and the wrist bone pin bolt 5 to be fixedly connected.
The radius handle 10 is inserted into the cavity of the radius bone marrow of a patient through punching and reaming, the surface 10 of the radius handle is provided with a granular cobalt-chromium-molybdenum metal coating, and the radius handle is fixed in the cavity of the radius bone marrow of the patient in a bone ingrowth mode.
The movable sphere 7 is made of ultra-high molecular polyethylene, and the surface of the movable sphere is a polished spherical surface.
The wrist platform 2 is rotatable about the radius assembly 11.
The technical solution of the present invention is described below with reference to the following specific embodiments:
examples
A trans-wrist joint prosthesis is used for treating suppurative arthritis, tumor and wrist joint patients.
A trans-wrist joint prosthesis comprises a radius component 11, a movable ball 7 and a metacarpal component 12, and is characterized in that: the radius assembly 12 is formed by connecting a radius handle 10 with a radius platform 9, the radius handle 10 is a needle-shaped bulge, the bulge can be inserted into a radius medullary cavity to be fixed in a patient body, the radius platform 9 is in a circular truncated cone shape with the area of an upper end circle larger than that of a lower end circle, a press-fit bolt 8 is connected to the upper end face of the radius platform 9, the movable sphere 7 is an oval hemisphere cut along the diameter of the sphere, a groove 15 matched with the press-fit bolt 8 is arranged inside the movable sphere, and the groove 15 can be inserted into the press-fit bolt 8 to fix the movable sphere 7 on the radius assembly 11;
the metacarpal bone component 12 is composed of a wrist joint nest 4 and a wrist bone platform 2, the lower end face of the wrist joint nest 5 is an inwards concave spherical surface matched with the upper surface of the movable ball 7, a wrist bone screw hole 16 is formed in the middle position of the upper end inside the wrist joint nest 5, two movable holes 13 are formed in the positions of two sides of the 2 ulnar and radial sides of the wrist bone platform respectively, one end of a universal ball 18 is connected to the bottom end in each movable hole, the other end of the universal ball 18 is connected with a wrist bone screw hole 17, one end of a femoral screw 3 can be inserted into the wrist bone screw hole 17, the end of the wrist bone screw 3 can move in each movable hole 13, the wrist bone screw 3 is inserted into the wrist bone screw hole 16 to connect and fix the wrist bone platform on the wrist joint nest 4, and the middle position of the wrist bone.
The orthopedic doctor squeezes in the patient's palm bone with carpal screw 3, and carpal handle 1 inserts the carpal, inserts carpal bolt 5 in the wrist bone bolt screw hole in wrist bone joint socket 4, and horizontal pin inserts fixes carpal bolt 5 in horizontal pin screw hole 14, accomplishes the fixed of carpal platform 4 and wrist joint ball socket 4, puts into the lower concave surface of joint ball socket 4 with activity spheroid 7 upper surface, in the pressure-fit bolt screw hole 15 in the activity spheroid 7 with the pressure-fit bolt 8 screw in on the radius platform 9, and radius handle 10 is fixed in patient's radius marrow intracavity with the mode that the bone went into, accomplishes the installation of whole device.
The trans-wrist joint prosthesis is suitable for treating wrist joints of patients for a long time; compare in traditional wrist joint prosthesis, overturned traditional wrist joint prosthesis's ball and socket relation, made the rotation center more be close to the near-end, lengthened wrist joint's moment, more accorded with human normal physiological structure, made wrist joint's activity more free, trans wrist joint is guaranteeing under the unchangeable condition of whole joint height, can deepen wrist bone joint socket, is more difficult for dislocation for traditional wrist joint. The fixing mode of the radius handle is bone ingrowth and leaves more room for later-stage joint revision.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A trans-wrist prosthesis, comprising: the radius assembly is formed by connecting a radius handle with a radius platform, the radius handle is a needle-shaped bulge, the bulge can be inserted into a radius medullary cavity to be fixed in a patient body, the radius platform is in a round table shape with the area of an upper end circle larger than that of a lower end circle, a press-fit bolt is connected to the upper end face of the radius platform, the movable sphere is an oval hemisphere cut along the diameter of the sphere, a groove matched with the press-fit bolt is formed in the movable sphere, and the groove can be inserted into the press-fit bolt to fix the movable sphere on the radius assembly;
the metacarpal bone assembly is composed of a wrist joint nest and a wrist bone platform, the lower end face of the wrist joint nest is an inwards concave spherical surface matched with the upper surface of the movable sphere, a wrist bone screw hole is formed in the middle position of the upper end inside the wrist joint nest, two movable holes are formed in the positions of the two sides of the ulnar radius of the wrist bone platform respectively, one end of a universal ball is connected to the bottom end in each movable hole, the other end of the universal ball is connected with the wrist bone screw hole, the wrist bone screw hole can be inserted into one end of a femoral screw, the wrist bone screw is inserted into the wrist bone screw hole to connect and fix the wrist bone platform on the wrist joint nest, and the middle position of the wrist bone.
2. The trans wrist joint prosthesis of claim 1, wherein: the carpal bone handle is fixed in the third metacarpal bone of the patient through punching, reaming and head-shaped bone.
3. The trans wrist joint prosthesis of claim 1, wherein: the diameter of the threaded hole of the carpal screw is 3.5mm, and the carpal screw can be screwed in to the far end through the threaded hole of the carpal screw and fixed on the carpal platform.
4. The trans wrist joint prosthesis of claim 1, wherein: the wrist bone joint socket is made of cobalt-chromium-molybdenum alloy, a transverse pin screw hole is formed in the wrist bone joint socket, and a transverse pin can be inserted into the transverse pin screw hole and penetrates through the wrist bone joint socket and the wrist bone pin bolt to be fixedly connected.
5. The trans wrist joint prosthesis of claim 1, wherein: the radius handle is inserted into the cavity of the radius bone marrow of a patient through punching and marrow enlargement, the surface of the radius handle is provided with a granular cobalt-chromium-molybdenum metal coating, and the radius handle is fixed in the cavity of the radius bone marrow of the patient in a bone ingrowth mode.
6. The trans wrist joint prosthesis of claim 1, wherein: the movable sphere is made of ultra-high molecular polyethylene, and the surface of the movable sphere is a polished spherical surface.
7. The trans wrist joint prosthesis of claim 1, wherein: the carpal platform is rotatable about the radius assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921601926.0U CN210843637U (en) | 2019-09-25 | 2019-09-25 | Trans-wrist joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921601926.0U CN210843637U (en) | 2019-09-25 | 2019-09-25 | Trans-wrist joint prosthesis |
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| Publication Number | Publication Date |
|---|---|
| CN210843637U true CN210843637U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921601926.0U Expired - Fee Related CN210843637U (en) | 2019-09-25 | 2019-09-25 | Trans-wrist joint prosthesis |
Country Status (1)
| Country | Link |
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| CN (1) | CN210843637U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113633441A (en) * | 2021-09-15 | 2021-11-12 | 上海市浦东新区公利医院(第二军医大学附属公利医院) | Total trans-wrist joint prosthesis with function of lower ulnar joint reserved |
| WO2022127330A1 (en) * | 2020-12-16 | 2022-06-23 | 苏州感动赋能医疗科技有限公司 | Wrist joint radial prosthesis |
| CN114668560A (en) * | 2021-12-31 | 2022-06-28 | 北京市春立正达医疗器械股份有限公司 | Adjustable limiting type wrist joint prosthesis |
| CN117564430A (en) * | 2024-01-15 | 2024-02-20 | 中国核动力研究设计院 | Pressurizing assembly, equipment and welding method for curved surface workpiece diffusion welding |
-
2019
- 2019-09-25 CN CN201921601926.0U patent/CN210843637U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127330A1 (en) * | 2020-12-16 | 2022-06-23 | 苏州感动赋能医疗科技有限公司 | Wrist joint radial prosthesis |
| CN113633441A (en) * | 2021-09-15 | 2021-11-12 | 上海市浦东新区公利医院(第二军医大学附属公利医院) | Total trans-wrist joint prosthesis with function of lower ulnar joint reserved |
| CN114668560A (en) * | 2021-12-31 | 2022-06-28 | 北京市春立正达医疗器械股份有限公司 | Adjustable limiting type wrist joint prosthesis |
| CN117564430A (en) * | 2024-01-15 | 2024-02-20 | 中国核动力研究设计院 | Pressurizing assembly, equipment and welding method for curved surface workpiece diffusion welding |
| CN117564430B (en) * | 2024-01-15 | 2024-04-02 | 中国核动力研究设计院 | Pressurizing assembly, equipment and welding method for curved surface workpiece diffusion welding |
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Granted publication date: 20200626 |