CN212522089U - Palm and finger and interphalangeal joint prosthesis - Google Patents
Palm and finger and interphalangeal joint prosthesis Download PDFInfo
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- CN212522089U CN212522089U CN202021316185.4U CN202021316185U CN212522089U CN 212522089 U CN212522089 U CN 212522089U CN 202021316185 U CN202021316185 U CN 202021316185U CN 212522089 U CN212522089 U CN 212522089U
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Abstract
The utility model discloses a palm indicates and interphalangeal joint prosthesis, including near-end prosthesis, distal end prosthesis and set up the gasket between near-end prosthesis and distal end prosthesis, the near-end prosthesis includes near-end prosthesis joint portion and near-end prosthesis stalk portion, and the distal end prosthesis includes distal end prosthesis joint portion and distal end prosthesis stalk portion, and near-end prosthesis joint portion and distal end prosthesis joint portion form the axle cooperation through the rotation axis and connect. This scheme is through setting up near-end prosthesis and the distal end prosthesis of hub connection, can be used to the replacement of metacarpophalangeal joint and interphalangeal joint, and the relative one side of distal end joint head and/or near-end joint head is the cambered surface design moreover, and when distal end prosthesis straightens with the near-end prosthesis, the upper portion of the opposite face of distal end joint head and near-end joint head is spacing through arc gasket butt, prevents that the finger from taking place the anti-joint bending under the atress condition. The pad structure is used for simulating articular cartilage or meniscus-like structures in human joints, plays a role in buffering pressure and ensures the flexion and extension fluency of finger joints and metacarpophalangeal joints.
Description
The technical field is as follows:
the utility model relates to a palm finger and interphalangeal joint prosthesis, which belongs to the field of medical appliances.
Background art:
the hand is the most important organ of labor, and the metacarpophalangeal joints and proximal interphalangeal joints are important structures of the hand. Diseases or trauma can cause chronic pain, deformity or dyskinesia of metacarpophalangeal joints and proximal interphalangeal joints, and as the diseases occur, progress and return, the movements of the metacarpophalangeal joints and the proximal interphalangeal joints are affected to different degrees, and finally the dysfunction of the finger joints is caused, and normal life is affected. For patients who can not recover the functions of the metacarpophalangeal joint and the interphalangeal joint, joint fusion, free implantation of the metatarsophalangeal joint and artificial finger joint replacement can be selected for treatment. Joint fusion is currently the most common treatment modality with relatively simple and convenient operation and low cost, but the loss of joint function is severe. The free transplantation of the metatarsophalangeal joint can keep the joint mobility to the maximum extent, but has the defects of high microsurgical technical requirements of operators, large operative wound, multiple joint lesions, incapability of joint transplantation and the like, and most importantly, the method has the cost of damaging another part of tissues of a human body, so that a part of patients are unwilling to adopt the method. The artificial joint replacement can avoid the defects and becomes the most promising treatment method for keeping the joint function.
The existing palm and interphalangeal joint prosthesis has a certain problem. The publication No. CN105496612B discloses a finger joint prosthesis, which comprises a finger joint and a metacarpophalangeal joint, wherein the finger joint comprises a ball socket head and a finger joint handle part, the metacarpophalangeal joint comprises a ball head and a metacarpophalangeal joint handle part, the finger joint prosthesis can be replaced and used as a prosthesis, but the ball head is fixed in the ball socket head, the finger joint can rotate at any angle, and for the metacarpophalangeal and interphalangeal joints, the moving angle is only 90 degrees or slightly larger than 90 degrees, so that after the finger joint prosthesis is replaced, the finger joint can be bent reversely due to improper finger force application, and the finger joint cannot play a real role of the finger joint; patent No. CN209048365U discloses a finger joint prosthesis structure, which comprises a proximal prosthesis, a joint component, a distal prosthesis and a rotating shaft, wherein the proximal prosthesis comprises a proximal prosthesis joint part and a proximal prosthesis handle part, the joint component comprises a joint component head part and a joint component tail part, and the distal prosthesis comprises a distal prosthesis head part and a distal prosthesis handle part; the proximal prosthesis joint part and the joint component head form shaft fit connection through a rotating shaft, the joint component tail is connected with the distal prosthesis head, the proximal prosthesis handle is in threaded connection with the proximal expansion screw, and the distal prosthesis handle is in threaded connection with the distal expansion screw. It has the problems that: firstly, the finger joint prosthesis is not provided with a structure for fixing the collateral ligament, when the finger joint is replaced, the collateral ligament can only be fixed with the skin, and the replaced finger joint is not fixed, on one hand, the distal prosthesis can rotate or swing along the length direction of the finger to a certain extent or shift to the side; on the other hand, the side collateral ligament is not filled between the finger joint prosthesis and the skin, and the finger joint prosthesis directly abrades the skin, so that the skin near the finger joint is easily damaged; secondly, the length of the handle part of the proximal prosthesis is fixed, the length of the fingers to be cut is not consistent due to pathological changes or external force damage, and in addition, the length of the fingers of adults and children is different, so that the handle part of the proximal prosthesis with fixed length cannot meet the requirement; and the joint part of the proximal prosthesis is in hard contact with the tail part of the joint component, so that no buffer exists, and the finger joint is easy to bend and stretch.
The utility model has the following contents:
in order to solve the above technical problems, an object of the present invention is to provide a palm finger and interphalangeal joint prosthesis.
The utility model discloses by following technical scheme implement: a palm and finger and interphalangeal joint prosthesis comprises a near-end prosthesis and a far-end prosthesis, wherein the near-end prosthesis comprises a near-end prosthesis joint part and a near-end prosthesis handle part, the far-end prosthesis comprises a far-end prosthesis joint part and a far-end prosthesis handle part, and the near-end prosthesis joint part and the far-end prosthesis joint part form shaft matching connection through a rotating shaft.
Furthermore, the proximal prosthesis joint part comprises a proximal joint head, and the proximal prosthesis handle part and the connecting head are respectively and fixedly arranged on two opposite sides of the proximal joint head; the distal end prosthesis joint part comprises a distal end joint head, one side of the distal end joint head is fixedly provided with the distal end prosthesis handle part, the distal end joint head and the other side corresponding to the distal end prosthesis handle part are provided with a connecting groove, the connecting head is arranged in the connecting groove, and the connecting groove is rotatably connected with the two groove walls of the connecting groove through a rotating shaft penetrating through the connecting groove.
Furthermore, one surface of the far-end joint head opposite to the near-end joint head is designed to be an arc surface, the curvature of the arc surface is close to that of a human finger joint head, the normal moving range of the joint is guaranteed to the maximum extent, and when the far-end prosthesis and the near-end prosthesis are straightened, the upper parts of the opposite surfaces of the far-end joint head and the near-end joint head are abutted and limited, so that the reverse joint is prevented from being bent.
Furthermore, one surface of the near-end joint head opposite to the far-end joint head is designed to be an arc surface, and when the far-end prosthesis and the near-end prosthesis are straightened, the upper parts of the opposite surfaces of the far-end joint head and the near-end joint head are abutted and limited, so that the reverse joint is prevented from being bent.
Furthermore, a gasket is sleeved on the connecting head, and one side of the gasket is attached to the far-end joint head.
Furthermore, one surface of the gasket, which is far away from the proximal joint head, is designed to be an arc surface, and when the distal prosthesis and the proximal prosthesis are straightened, the upper parts of the opposite surfaces of the distal joint head and the gasket are abutted and limited, so that the reverse joint is prevented from bending.
Further, the gasket is a silica gel gasket.
Furthermore, threading holes of the insertion points of the collateral ligament similar to the normal joint are formed in the outer wall of the connecting groove of the far-end joint head and the outer wall of the near-end joint head, so that the suture of soft tissues around the joint and the suture of the joint prosthesis are facilitated, the human body design is better met, the joint stability is maintained, and the joint comfort level is improved.
Further, screw holes are formed in the proximal prosthesis handle portion and the distal prosthesis handle portion.
Further, screw holes are formed in the proximal prosthesis handle portion and the distal prosthesis handle portion.
Furthermore, a limiting table is fixedly arranged between the upper groove walls of the connecting grooves, and when the far-end prosthesis and the near-end prosthesis are straightened, the upper part of the far-end joint head is abutted and limited with the limiting table, so that the reverse joint is further prevented from being bent.
Furthermore, the proximal prosthesis, the distal prosthesis, the limiting table and the rotating shaft are all made of titanium alloy or ceramic.
Furthermore, the proximal handle sides of the distal joint head and the proximal joint head are designed into planar structures, and are stably combined with osteotomy planes at two ends of the joint during installation, so that the stability of the joint is ensured.
The utility model discloses the gasket structure side is observed for the ox horn appearance, and the dorsal part is wide, and most advanced is to the palm side, and one side camber that pastes mutually with the joint head is unanimous with the joint head camber, and the design of laminating, relative opposite side camber can be designed into several models such as big, well, little according to the requirement camber of joint activity degree, and the change through the gasket camber satisfies metacarpophalangeal joint or indicates that articulated home range (normal human metacarpophalangeal joint and interphalangeal joint are bent and are stretched home range difference).
The utility model has the advantages that:
1. the utility model discloses a set up near-end prosthesis and distal end prosthesis of hub connection, can be used to the replacement of metacarpophalangeal joint and interphalangeal joint, the one side that the joint head of distal end and/or near-end is relative is the cambered surface design moreover, and when distal end prosthesis straightens with the near-end prosthesis, the upper portion butt of the opposite face of the joint head of distal end and near-end is spacing, prevents that the finger from taking place the anti-joint under the atress condition and crooked.
2. The utility model discloses a cover is equipped with the gasket on the connector for articular cartilage or meniscus appearance structure in the simulation human joint, distal end prosthesis when bending and stretching with the near-end prosthesis, the gasket plays the effect of slow-down pressure and blocks soft tissue embedding joint clearance around the joint, thereby prolongs the joint life and protects soft tissue effect around the joint, guarantees the joint and metacarpophalangeal joint bend and stretch the smoothness degree.
3. The utility model discloses on the spread groove outer wall of distal end joint head to and all be equipped with the through wires hole on the near-end joint head outer wall, when finger joint or metacarpophalangeal joint replacement, cut away original finger joint, and cut away the dead point and the starting point of original fixed side collateral ligament, then sew up the side collateral ligament with the operation line, the operation line passes through the through wires hole and fixes with the joint after the replacement, realized the fixing of distal end prosthesis and near-end prosthesis on the one hand, avoid it to rotate or swing along finger length direction, or shift to side; on the other hand, the collateral ligament is filled between the replaced joint prosthesis and the skin, so that the direct abrasion of the skin by the replaced joint prosthesis is avoided, and the damage to the skin is prevented.
4. The utility model is provided with screw holes on the near-end prosthesis handle part and the far-end prosthesis handle part, before the joint replacement, the length of the near-end prosthesis handle part and/or the far-end prosthesis handle part is determined to meet the requirement according to the length to be cut of the joint to be replaced, if the length is not required to be prolonged, the near-end prosthesis handle part and the far-end prosthesis handle part are directly sleeved into the corresponding joint medullary cavity; if the extension is needed, the prefabricated module is sleeved on the handle part of the near-end prosthesis and/or the handle part of the far-end prosthesis and is fixed by screws; the proximal prosthesis stem and/or the distal prosthesis stem are ultimately secured with the joint medullary cavity using bone cement. Therefore, replacement of metacarpal bones/phalangeal joints and metacarpophalangeal joints with different lengths is realized, the application range is wide, and the practicability is high.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a metacarpophalangeal and interphalangeal joint prosthesis;
FIG. 2 is a schematic view of a proximal prosthesis;
FIG. 3 is a schematic view of a distal prosthesis.
In the figure: the artificial joint comprises a near-end prosthesis 1, a near-end prosthesis joint part 1.1, a near-end joint head 1.1.1, a connector 1.1.2, a near-end prosthesis handle part 1.2, a far-end prosthesis 2, a far-end prosthesis joint part 2.1, a far-end joint head 2.1.1, a connecting groove 2.1.2, a limiting table 2.1.3, a far-end prosthesis handle part 2.2, a rotating shaft 3, a silica gel gasket 4, a threading hole 5 and a screw hole 6.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A metacarpophalangeal and interphalangeal joint prosthesis comprises a near-end prosthesis 1 and a far-end prosthesis 2, wherein the near-end prosthesis 1 comprises a near-end prosthesis joint part 1.1 and a near-end prosthesis handle part 1.2, the far-end prosthesis 2 comprises a far-end prosthesis joint part 2.1 and a far-end prosthesis handle part 2.2, the near-end prosthesis joint part 1.1 comprises a near-end joint head 1.1.1, and a near-end prosthesis handle part 1.2 and a connector 1.1.2 are fixedly arranged on two opposite sides of the near-end joint head 1.1.1 respectively; the distal end prosthesis joint part 2.1 comprises a distal end joint head 2.1.1, a distal end prosthesis handle part 2.2 is fixedly arranged on one side of the distal end joint head 2.1.1, a connecting groove 2.1.2 is formed in the other side, corresponding to the distal end prosthesis handle part 2.2, of the distal end joint head 2.1.1, the connecting head 1.1.2 is arranged in the connecting groove 2.1.2, and is rotatably connected with the rotating shaft 3 of the connecting head 1.1.2 through two groove walls penetrating through the connecting groove 2.1.2.
The one side that far-end joint head 2.1.1 and near-end joint head 1.1.1 are relative is the cambered surface design, the cover is equipped with silica gel gasket 4 on connector 1.1.2, silica gel gasket 4 one side and the laminating setting of far-end joint head 2.1.1, the one side that near-end joint head 2.1.1 was kept away from to silica gel gasket 4 also is the cambered surface design, and, still be equipped with spacing platform with spread groove 2.1.2 an organic whole between the upper portion cell wall of spread groove 2.1.2, work as when far-end prosthesis 2 straightens with near-end prosthesis 1, the upper portion butt of the opposite face of far-end joint head 2.1.1 and silica gel gasket 4 is spacing, and the upper portion and the spacing platform butt of far-end joint head 2.1.1 are spacing, further prevent the anti.
Threading holes 5 are respectively arranged on the outer walls of the connecting grooves 2.1.2 of the far-end joint head 2.1.1 and the outer walls of the near-end joint head 1.1.1, and screw holes 6 are respectively arranged on the near-end prosthesis handle part 1.2 and the far-end prosthesis handle part 2.2.
The proximal prosthesis 1, the distal prosthesis 2, the limiting table and the rotating shaft 3 are all made of titanium alloy.
Instructions for use:
when joint replacement is carried out, firstly, an X-ray film is shot for a joint to be replaced, the length to be cut of the joint and the size of a joint medullary cavity are determined, whether the length of the proximal prosthesis handle part 1.2 and/or the length of the distal prosthesis handle part 2.2 meet requirements or not is determined, and if extension is not needed, the proximal prosthesis handle part 1.2 and the distal prosthesis handle part 2.2 are directly sleeved into the corresponding joint medullary cavity; if the extension is needed, the prefabricated module is sleeved on the proximal prosthesis handle part 1.2 and/or the distal prosthesis handle part 2.2 and is fixed by screws;
when the joint is cut, the original point of attachment and the original point of origin for fixing the collateral ligament are cut off together, then the collateral ligament is sewed up with the joint after replacement by the operation line, the operation line passes through the threading holes 5 on the outer walls of the connecting groove 2.1.2 and the near-end joint head 1.1.1, so that the threading holes 5 are fixed with the joint after replacement, the fixation of the far-end prosthesis 2 and the near-end prosthesis 1 is realized, and the rotation or the swing of the far-end prosthesis 2 along the length direction of the fingers or the lateral displacement of the fingers is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A metacarpophalangeal and interphalangeal joint prosthesis comprises a near-end prosthesis and a far-end prosthesis, and is characterized in that the near-end prosthesis comprises a near-end prosthesis joint part and a near-end prosthesis handle part, the far-end prosthesis comprises a far-end prosthesis joint part and a far-end prosthesis handle part, and the near-end prosthesis joint part and the far-end prosthesis joint part form shaft fit connection through a rotating shaft.
2. The metacarpophalangeal and interphalangeal joint prosthesis according to claim 1, wherein the proximal prosthesis joint portion comprises a proximal joint head, and the proximal prosthesis stem portion and the connecting head are respectively fixedly arranged on two opposite sides of the proximal joint head; the distal end prosthesis joint part comprises a distal end joint head, one side of the distal end joint head is fixedly provided with the distal end prosthesis handle part, the distal end joint head and the other side corresponding to the distal end prosthesis handle part are provided with a connecting groove, the connecting head is arranged in the connecting groove, and the connecting groove is rotatably connected with the two groove walls of the connecting groove through a rotating shaft penetrating through the connecting groove.
3. The prosthesis of claim 2, wherein the distal joint head is designed to be cambered on the side opposite to the proximal joint head, and when the distal joint head is straightened from the proximal joint head, the upper parts of the opposite sides of the distal joint head and the proximal joint head abut and limit.
4. The prosthesis of claim 3, wherein the face of the proximal joint head opposite the distal joint head is also of a cambered design.
5. The prosthesis of any one of claims 2 to 4, wherein a spacer is provided on the joint head, one side of the spacer being in contact with the distal joint head.
6. The prosthesis of claim 5, wherein the face of the spacer away from the proximal joint head is designed to be cambered, and when the distal and proximal prostheses are straightened, the distal joint head and the upper portion of the opposing face of the spacer abut to limit the position.
7. The metacarpophalangeal and interphalangeal joint prosthesis according to claim 5, characterized in that said gasket is a silicone gasket.
8. The prosthesis of claim 5, wherein the outer wall of the connecting groove of the distal joint head and the outer wall of the proximal joint head are provided with threading holes of the insertion points of collateral ligaments similar to those of a normal joint.
9. The metacarpophalangeal and interphalangeal joint prosthesis according to any one of claims 1 to 4, characterized in that screw holes are provided on both said proximal prosthesis stem and said distal prosthesis stem.
10. The metacarpophalangeal and interphalangeal joint prosthesis according to any of claims 6 to 8, characterized in that screw holes are provided on both said proximal prosthesis stem and said distal prosthesis stem.
11. The prosthesis of claim 3, wherein a stop is fixed between the upper slot walls of the connecting slots, and when the distal prosthesis and the proximal prosthesis are straightened, the upper portion of the distal joint head abuts against the stop for stopping.
12. The metacarpophalangeal and interphalangeal joint prosthesis according to claim 11, characterized in that the proximal prosthesis, the distal prosthesis, the limit table and the rotation axis are all made of titanium alloy or ceramic.
13. The metacarpophalangeal and interphalangeal joint prosthesis according to claim 12, characterized in that the proximal sides of said distal joint head and said proximal joint head are designed as plane structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021316185.4U CN212522089U (en) | 2020-07-07 | 2020-07-07 | Palm and finger and interphalangeal joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021316185.4U CN212522089U (en) | 2020-07-07 | 2020-07-07 | Palm and finger and interphalangeal joint prosthesis |
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| Publication Number | Publication Date |
|---|---|
| CN212522089U true CN212522089U (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021316185.4U Active CN212522089U (en) | 2020-07-07 | 2020-07-07 | Palm and finger and interphalangeal joint prosthesis |
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|---|---|
| CN (1) | CN212522089U (en) |
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2020
- 2020-07-07 CN CN202021316185.4U patent/CN212522089U/en active Active
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