Anti-dislocation movable gasket for knee joint unicompartmental knee arthroplasty

Abstract

The utility model belongs to the technical field of medical movable gaskets, and particularly relates to a dislocation-preventing movable gasket for knee joint unicompartmental knee arthroplasty, which comprises a mounting seat, mounting plates are symmetrically arranged in the mounting seat, and a connecting plate is fixedly connected between the symmetrically arranged mounting plates. The top of the upper mounting plate is fixedly connected with a gasket buffering assembly, the gasket buffering assembly comprises a macromolecular polyethylene buffering gasket, a macromolecular polyethylene connecting gasket and a macromolecular polyethylene connecting air bag, and the macromolecular polyethylene connecting gasket is fixedly connected to the top of the mounting plate; a carrier capable of providing connection between the two sides of the whole gasket buffer assembly and the tibia prosthesis and the thighbone prosthesis can be provided, so that the whole gasket buffer assembly can be in a relatively stable connection state with the tibia prosthesis and the thighbone prosthesis; meanwhile, when the macromolecular polyethylene buffer gasket and the macromolecular polyethylene connecting gasket are pulled by the thighbone prosthesis and the tibia prosthesis, the whole gasket buffer assembly can well buffer along with the action between the thighbone prosthesis and the tibia prosthesis.

Description

TECHNICAL FIELD

[0001] The utility model belongs to medical movable gasket technical field, concretely relates to a knee joint unicompartmental arthroplasty anti-dislocation movable gasket. BACKGROUND

[0002] The anti-dislocation movable gasket is used in knee joint unicompartmental arthroplasty, prevents abnormal dislocation of femoral prosthesis and tibial prosthesis during movement, guarantees the normal position relation of knee joint under various movement states, buffers and reduces shock, optimizes movement track and reduces wear, and when the implantation of femoral prosthesis and tibial prosthesis is completed, the anti-dislocation movable gasket is placed between the femoral prosthesis and the tibial prosthesis, so that the effect of optimizing movement track between the gasket and the prosthesis is reduced after the gasket is fixed between the prosthesis, and therefore the gasket is in a state of no connection between the prosthesis, but the state of no connection may cause unreasonable displacement of the movable gasket during long-term use, causing discomfort of the patient during use. UTILITY MODEL CONTENTS

[0003] The knee joint unicompartmental arthroplasty anti-dislocation movable gasket has the characteristics that stable connection between the femoral prosthesis and the tibial prosthesis can be provided, and good displacement can be achieved when the angle of the tibial prosthesis and the femoral prosthesis is adjusted.

[0004] The utility model provides the following technical scheme: a knee joint unicompartmental arthroplasty anti-dislocation movable gasket, including the mounting seat, the inside symmetry of mounting seat is provided with the mounting panel, the fixed connection of symmetry is arranged between mounting panel Connection plate, the top fixed connection of upper mounting panel has gasket buffer assembly, and gasket buffer assembly includes high molecular polyethylene buffer gasket, high molecular polyethylene connecting gasket and high molecular polyethylene connecting air bag, high molecular polyethylene connecting gasket is fixedly connected to the top of mounting panel, high molecular polyethylene connecting air bag is fixedly connected to the top of high molecular polyethylene connecting gasket, high molecular polyethylene buffer gasket is fixedly connected to the top of high molecular polyethylene connecting gasket, the outside fixed connection of gasket buffer assembly has high molecular polyethylene outer connecting sheet.

[0005] Wherein, the top of high molecular polyethylene buffer gasket is fixedly connected with connecting top column.

[0006] Wherein, the connecting plate and the symmetrically arranged mounting plate form a limiting groove.

[0007] Wherein, the inside of mounting seat is fixedly connected with annular limiting ring, and the annular limiting ring is located in the inside of limiting groove.

[0008] The high-molecular polyethylene outer connecting piece and the outside of the gasket buffer assembly form a displacement bin.

[0009] The beneficial effects of the utility model are: under the cooperation of the high-molecular polyethylene gasket, the high-molecular polyethylene connecting gasket and the high-molecular polyethylene connecting air bag, a connecting carrier can be provided between the two sides of the gasket buffer assembly and the tibial prosthesis and the femoral prosthesis, so that the gasket buffer assembly can be in a relatively stable connection state with the tibial prosthesis and the femoral prosthesis, and the displacement of the gasket can be avoided during the long-term use of the patient after the operation; meanwhile, under the action of the high-molecular polyethylene connecting air bag, the high-molecular polyethylene gasket and the high-molecular polyethylene connecting gasket can be connected to the femoral prosthesis and the tibial prosthesis respectively, and sufficient displacement allowance can be provided for the high-molecular polyethylene gasket and the high-molecular polyethylene connecting gasket when they are pulled by the femoral prosthesis and the tibial prosthesis, so that the gasket buffer assembly can be well buffered along with the movement between the femoral prosthesis and the tibial prosthesis.

[0010] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view structural schematic view when the utility model is installed with a prosthesis.

[0012] Figure 2 It is a front view structural schematic view when the utility model is installed with a prosthesis. Figure 1 It is an enlarged detail schematic view of A in the utility model.

[0013] Figure 3 It is a three-dimensional schematic view between the gasket buffer assembly and the mounting plate in the utility model.

[0014] Figure 4 It is a three-dimensional structural schematic view between the mounting seat and the annular limiting ring in the utility model.

[0015] In the figure: 1, gasket buffer assembly; 11, high-molecular polyethylene gasket; 12, high-molecular polyethylene connecting gasket; 13, high-molecular polyethylene connecting air bag; 14, high-molecular polyethylene outer connecting piece; 141, displacement bin; 15, connecting top column; 2, mounting plate; 21, connecting plate; 22, limiting groove; 3, mounting seat; 31, annular limiting ring. DETAILED DESCRIPTION

[0016] Please refer to Figures 1-4The utility model provides following technical scheme: a knee joint unicompartmental replacement anti -dislocation movable gasket, the inside symmetry of mounting seat 3 is provided with mounting panel 2, the fixedly connected with connecting plate 21 between the symmetry of mounting panel 2, the top fixedly connected with gasket buffer assembly 1 of mounting panel 2 in the upper portion, and gasket buffer assembly 1 includes high molecular polyethylene buffer gasket 11, high molecular polyethylene connecting gasket 12 and high molecular polyethylene connecting air bag 13, high molecular polyethylene connecting gasket 12 is fixedly connected on the top of mounting panel 2, high molecular polyethylene connecting air bag 13 is fixedly connected on the top of high molecular polyethylene connecting gasket 12, high molecular polyethylene buffer gasket 11 is fixedly connected on the top of high molecular polyethylene connecting gasket 12, the outside fixedly connected with high molecular polyethylene outer connecting piece 14 of gasket buffer assembly 1.

[0017] In the embodiment: the mounting base 3 is the bottom mounting part of the whole movable gasket, used for connecting with the tibial prosthesis below, and the cooperation between the mounting plate 2 and the connecting plate 21 forms a connecting assembly for connecting between the gasket buffer assembly 1 and the mounting base 3, the high molecular polyethylene connecting air bag 13 in the gasket buffer assembly 1 is used for connecting with the mounting plate 2, and the high molecular polyethylene connecting air bag 13 plays a role of buffering and connecting, and at the same time, the high molecular polyethylene connecting air bag 13 is used to provide a movement allowance for the high molecular polyethylene buffer gasket 11 when the high molecular polyethylene buffer gasket 11 moves, the high molecular polyethylene buffer gasket 11 is used to provide a buffer and shock absorbing gasket between the tibial prosthesis and the femoral prosthesis, and through the buffering and shock absorbing of the high molecular polyethylene buffer gasket 11 between the femoral prosthesis and the tibial prosthesis, the stability of the joint between the femoral prosthesis and the tibial prosthesis can be maintained, and the wear between the prostheses is reduced, and under the cooperation of the high molecular polyethylene buffer gasket 11, the high molecular polyethylene connecting air bag 13 and the high molecular polyethylene connecting gasket 12, the whole gasket buffer assembly 1 can provide a connecting carrier between the two sides of the whole gasket buffer assembly 1 and the tibial prosthesis and the femoral prosthesis, so that the whole gasket buffer assembly 1 can be in a relatively stable connection state with the tibial prosthesis and the femoral prosthesis, avoiding the displacement of the gasket in the long-term use stage of the patient after the operation, and under the action of the high molecular polyethylene connecting air bag 13, the high molecular polyethylene buffer gasket 11 and the high molecular polyethylene connecting gasket 12 can provide sufficient displacement allowance when the high molecular polyethylene buffer gasket 11 and the high molecular polyethylene connecting gasket 12 are connected with the femoral prosthesis and the tibial prosthesis respectively, so that the whole gasket buffer assembly 1 can be well buffered with the action between the femoral prosthesis and the tibial prosthesis, and the high molecular polyethylene outer connecting piece 14 outside the gasket buffer assembly 1 is used for protecting the outside of the gasket buffer assembly 1, so that the outside of the whole gasket buffer assembly 1 forms a complete connecting surface under the wrapping of the high molecular polyethylene outer connecting piece 14.

[0018] The top of the high molecular polyethylene buffer gasket 11 is fixedly connected with a connecting top column 15; wherein the connecting top column 15 is used to provide a connecting carrier between the high molecular polyethylene buffer gasket 11 and the femoral prosthesis, so that the whole gasket buffer assembly 1 can improve the stability of the whole gasket buffer assembly 1 in the use process through the connection between the whole gasket buffer assembly 1 and the femoral prosthesis.

[0019] The limiting groove 22 is formed between the connecting plate 21 and the symmetrically arranged mounting plate 2, the annular limiting ring 31 is fixedly connected to the inside of the mounting seat 3, and the annular limiting ring 31 is located in the inside of the limiting groove 22; wherein the limiting groove 22 is used for providing installation space for the annular limiting ring 31, when the knee joint unicompartmental arthroplasty is performed on the patient, the mounting seat 3 is installed on the tibial prosthesis, then the mounting plate 2 is installed in the inside of the mounting seat 3, and when the mounting plate 2 is installed in the mounting seat 3, the annular limiting ring 31 is first clamped in the inside of the limiting groove 22, and then the carrier is fixed between the mounting plate 2 and the mounting seat 3 through the fixing piece.

[0020] The displacement space 141 is formed between the outer connecting piece 14 and the outside of the gasket buffer assembly 1; wherein the displacement space 141 is used for providing displacement space for the polyethylene gasket 11 and the polyethylene connecting gasket 12 when they are displaced, so as to avoid the influence of the polyethylene outer connecting piece 14 on the displacement of the polyethylene gasket 11 and the polyethylene connecting gasket 12.

[0021] The working principle and use process of the utility model are as follows: when the knee joint unicompartmental arthroplasty is performed on the patient, the mounting seat 3 is first installed on the tibial prosthesis, then the mounting plate 2 is installed in the inside of the mounting seat 3, and when the mounting plate 2 is installed in the mounting seat 3, the annular limiting ring 31 is first clamped in the inside of the limiting groove 22, and then the carrier is fixed between the mounting plate 2 and the mounting seat 3 through the fixing piece, after the connection between the tibial prosthesis is completed, the polyethylene gasket 11 is fixed between the connecting top column 15 and the femoral prosthesis, at this time, the installation of the whole movable gasket between the tibial prosthesis and the femoral prosthesis is completed, during the use after the operation, when the angle between the femoral prosthesis and the tibial prosthesis of the patient changes, at this time, the relative position of the polyethylene gasket 11 and the polyethylene connecting gasket 12 changes, at this time, the polyethylene connecting air bag 13 can provide the connecting carrier between the polyethylene gasket 11 and the polyethylene connecting gasket 12, and when the polyethylene gasket 11 and the polyethylene connecting gasket 12 are pulled by the femoral prosthesis and the tibial prosthesis, sufficient displacement space is provided, so that the whole gasket buffer assembly 1 can be well buffered along with the action between the femoral prosthesis and the tibial prosthesis.

Claims

1. A knee joint unicompartmental replacement anti-luxation mobile spacer comprising a mounting seat (3), characterized in that: The inside of the mounting seat (3) is symmetrically provided with mounting plates (2), the symmetrically arranged mounting plates (2) are fixedly connected with a connecting plate (21), the top of the upper mounting plate (2) is fixedly connected with a gasket buffer assembly (1), and the gasket buffer assembly (1) comprises a high polymer polyethylene buffer gasket (11), a high polymer polyethylene connecting gasket (12) and a high polymer polyethylene connecting air bag (13), the high polymer polyethylene connecting gasket (12) is fixedly connected to the top of the mounting plate (2), the high polymer polyethylene connecting air bag (13) is fixedly connected to the top of the high polymer polyethylene connecting gasket (12), the high polymer polyethylene buffer gasket (11) is fixedly connected to the top of the high polymer polyethylene connecting gasket (12), and the outside of the gasket buffer assembly (1) is fixedly connected with a high polymer polyethylene outer connecting sheet (14).

2. The anti-dislocation mobile spacer for knee unicompartmental arthroplasty according to claim 1, characterized in that: The top of the high polymer polyethylene buffer gasket (11) is fixedly connected with a connecting top column (15).

3. The anti-dislocation mobile spacer for unicompartmental knee arthroplasty according to claim 1, wherein: The connecting plate (21) and the symmetrically arranged mounting plates (2) form a limiting groove (22).

4. The anti-dislocation mobile spacer for unicompartmental knee arthroplasty according to claim 3, wherein: The inside of the mounting seat (3) is fixedly connected with an annular limiting ring (31), and the annular limiting ring (31) is located in the inside of the limiting groove (22).

5. The anti-dislocation mobile spacer for unicompartmental knee arthroplasty according to claim 1, wherein: The high polymer polyethylene outer connecting sheet (14) and the outside of the gasket buffer assembly (1) form a giving space bin (141).

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