Push plate for knee joint soft tissue balancing device
By designing a push plate of the knee joint soft tissue balance device with curved lateral sides and guide grooves, the problem of inaccurate measurement in the prior art is solved, and the accurate measurement of knee joint soft tissue balance and consistency of human joint balance is achieved. Suitable for joints and prostheses of various sizes.
Patent Information
- Application Number
- CN202420377959.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-28
AI Technical Summary
In existing knee replacement surgery, when measuring by a plane push plate in contact with the femoral condyle, the soft tissue balance cannot be accurately measured, resulting in inaccurate and unintuitive measurement results, especially when the femoral prosthesis slides and relative movement during joint flexion and extension. , cannot effectively simulate the arc-shaped structure of the tibia.
A push plate for soft tissue balance device of knee joint is designed, including an upper push plate, a gasket and a lower push plate. The outer edge of the push plate is arranged in an arc shape, and guide grooves and protrusions are arranged on the top and bottom surfaces, which can simulate the tibia. The platform structure is suitable for joints and prostheses of various sizes and limits the translation of the gaskets and bulges to ensure the accuracy of measurement results.
This device can improve the accuracy of knee soft tissue balance measurement, make the measurement results more consistent with human joint balance, and is suitable for knee joint force and gap measurement, reduce interference with soft tissue, and enhance structural stiffness and deformation stability.
Smart Images
Figure CN222130317U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of knee joint soft tissue balance measurement, in particular to a push plate for a knee joint soft tissue balance device. Background Art
[0002] Knee replacement surgery, also known as total knee replacement, is a common and effective surgical procedure used to treat serious knee diseases and injuries, such as severe osteoarthritis, traumatic joint destruction, or curvature deformity. The surgery is designed to reduce or eliminate pain, restore knee function, and improve the patient's quality of life.
[0003] In a knee replacement surgery, damaged knee tissue is replaced with artificial joint components. These artificial joint components are usually made of metal, plastic or ceramic materials and are designed to mimic the function and structure of a natural joint. During the operation, the doctor will remove the damaged bone and soft tissue through bone cutting and tissue repair steps, and then implant the appropriate artificial joint components into the knee joint.
[0004] In knee replacement surgery, it is crucial to ensure the stability and function of the artificial joint. Soft tissue balance plays a key role in the surgery, which involves the gap adjustment between the femoral condyle and the prosthesis to ensure normal movement and stability of the knee joint.
[0005] The balance measurement device currently used is measured by a flat push plate in contact with the femoral condyle. However, when the joint is flexed and extended, the femoral prosthesis slides and moves relative to the flat plate; at the same time, the flat plate is not consistent with the shape of the actual tibial arc gasket, so it is impossible to accurately measure the influence of some factors, such as the influence of climbing, which may lead to inaccurate, unintuitive and deviation in the measurement results from the actual prosthesis. Summary of the invention
[0006] In response to at least one of the problems in the above-mentioned prior art, the purpose of the utility model is to provide a push plate for a knee joint soft tissue balancing device, which is suitable for a force-bearing component for measuring knee joint force and gap, and a balance measuring device for knee joint soft tissue. The result of measuring soft tissue balance is more consistent with the final human joint balance after replacement, thereby improving the accuracy of the soft tissue balance measurement results.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A push plate for a knee joint soft tissue balancing device, comprising:
[0009] Two upper push plates are arranged symmetrically and at intervals, and the front outer side of the upper push plate is arranged in a convex arc shape; the front top surface of the upper push plate is provided with a guide groove;
[0010] The gasket is symmetrically provided with two gaskets; the top surface of the gasket is set as a concave arc surface, the outer side is set as a convex arc, and the bottom surface is provided with a guide protrusion; the two gaskets are respectively installed on the two upper push plates, and the guide protrusions are respectively slidably set in the guide grooves;
[0011] The lower push plate is arranged below the upper push plate; the front end of the lower push plate is opened in the middle, and the outer side is arranged in a convex arc shape.
[0012] Preferably, the thickness of the front portion of the push-up plate is smaller than the thickness of the rear portion.
[0013] Preferably, the guide groove is opened in the middle of the front top surface of the upper push plate.
[0014] Preferably, the length direction of the guide groove is perpendicular to the length direction of the upper push plate.
[0015] Preferably, a first connecting hole is provided at the rear of the upper push plate.
[0016] Preferably, the first connecting hole is opened at a rear middle position of the upper push plate.
[0017] Preferably, the width of the front and rear portions of the push-up plate is greater than the width of the middle portion.
[0018] Preferably, the thickness of the front portion of the push-down plate is smaller than the thickness of the rear portion.
[0019] Preferably, a second connecting hole is opened at the rear of the push-down plate.
[0020] Preferably, the second connecting hole is opened at the middle position of the rear part of the push-down plate.
[0021] The utility model adopts the above technical solution, which has the following advantages:
[0022] The push plate for the soft tissue balancing device of the knee joint provided by the utility model can simulate the physiological structure of the tibial plateau and match the structure of the prosthetic gasket by setting the front parts of the upper push plate and the lower push plate and the outer side contours of the gasket to be an arc convex outward, thereby matching the structure of the prosthetic gasket; by setting a guide groove on the front top surface of the upper push plate and a guide protrusion on the bottom surface of the gasket, when the gasket is placed on the upper push plate, the guide protrusion is slidably set in the guide groove, so that the gasket can perform limited translation on the push plate, so that the push plate as a whole can be suitable for joints and prostheses of various sizes; by setting the top surface of the gasket to be a concave arc surface, it is consistent with the prosthetic gasket and can be completely fitted with the femoral prosthesis; by opening the middle of the front end of the lower push plate, it is convenient to avoid the bony structure of the bone island during surgery; the push plate is suitable for a force-bearing component for measuring knee joint force and gap and a balancing measurement device for knee joint soft tissue, and the result of measuring soft tissue balance is more consistent with the human joint balance after the final replacement, thereby improving the accuracy of the soft tissue balance measurement result, and being convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a three-dimensional schematic diagram in a top view of a push plate for a knee joint soft tissue balancing device provided by an embodiment of the utility model.
[0024] Figure 2 It is a three-dimensional schematic diagram in the upward direction of a push plate for a knee joint soft tissue balancing device provided by an embodiment of the utility model.
[0025] Figure 3 It is a top view of a push plate for a knee joint soft tissue balancing device provided in one embodiment of the utility model.
[0026] Figure 4 It is a bottom view of a push plate for a knee joint soft tissue balancing device provided in one embodiment of the utility model.
[0027] Figure 5 It is a front view of a push plate for a knee joint soft tissue balancing device provided by one embodiment of the utility model.
[0028] Figure 6 It is a schematic diagram of the use status of a push plate for a knee joint soft tissue balancing device provided by one embodiment of the utility model.
[0029] Reference numerals in the figures:
[0030] 1 is an upper push plate, 110 is a guide groove, 120 is a first connecting hole, 2 is a gasket, 3 is a lower push plate, 310 is a second connecting hole, 4 is a connecting rod, and 5 is a knee joint soft tissue balancing device. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] The utility model provides a push plate for a knee joint soft tissue balancing device. By setting the front parts of the upper push plate and the lower push plate and the outer side contours of the gasket as an arc convex outward, it can simulate the physiological structure of the tibial plateau and match the structure of the prosthetic gasket; by setting a guide groove on the front top surface of the upper push plate and a guide protrusion on the bottom surface of the gasket, when the gasket is placed on the upper push plate, the guide protrusion is slidably set in the guide groove, and the gasket can perform limited translation on the push plate, so that the push plate as a whole can be suitable for joints and prostheses of various sizes; by setting the top surface of the gasket as a concave arc surface, it is consistent with the prosthetic gasket and can be completely fitted with the femoral prosthesis; by opening the middle of the front end of the lower push plate, it is convenient to avoid the bony structure of the bone island during surgery; the push plate is suitable for being installed in a knee joint soft tissue balancing device.
[0035] Below, the embodiments of the utility model are described in detail with reference to the accompanying drawings.
[0036] Example
[0037] Please refer to Figures 1 to 5A push plate for a knee joint soft tissue balancing device provided in this embodiment includes an upper push plate 1, a gasket 2 and a lower push plate 3, wherein two upper push plates 1 are arranged at intervals and symmetrically, and the front outer side edge of the upper push plate 1 is arranged as a convex arc; a guide groove 110 is provided on the front top surface of the upper push plate 1; two gaskets 2 are arranged symmetrically; the top surface of the gasket 2 is arranged as a concave arc surface, the outer side edge is arranged as a convex arc, and the bottom surface is arranged with a guide protrusion; the two gaskets 2 are respectively installed on the two upper push plates 1, and the guide protrusions are respectively slidably arranged in the guide grooves 110; the lower push plate 3 is arranged below the upper push plate 1; the front end middle of the lower push plate 3 is opened, and the outer side edge is arranged as a convex arc.
[0038] The push plate for the soft tissue balancing device of the knee joint of this embodiment has an outer front contour of the upper push plate 1 that is set to an arc that bulges outwards, which can simulate the physiological structure close to the tibial plateau and can match the structure of the prosthetic gasket; and a guide groove 110 is provided on the front top surface of the upper push plate 1, and a guide protrusion is provided on the bottom surface of the gasket 2. When the gasket 2 is placed on the upper push plate 1, the guide protrusion is slidably set in the guide groove 110, which can make the gasket 2 perform limited translation on the push plate 1, so that the push plate as a whole can be suitable for joints and prostheses of various sizes. The top surface of the gasket 2 is set to a concave arc surface, which is consistent with the prosthetic gasket and can be fully fitted with the femoral prosthesis; the outer contour of the gasket 2 is set to an arc that bulges outwards, which can simulate the physiological structure close to the tibial plateau and the prosthetic gasket structure. The front end of the push plate 3 is open in the middle, which is convenient for avoiding the bone structure of the bone island during surgery; the front outer contour of the push plate 3 is set to an arc convex outward, which can simulate the physiological structure of the tibial plateau and the prosthetic gasket structure. Figure 6 As shown, the push plate of this embodiment is suitable for being installed on a knee joint soft tissue balancing device 5 for use.
[0039] Please refer to Figures 1 to 3 and Figure 6 The thickness of the front part of the upper push plate 1 is smaller than that of the rear part, which can increase the structural rigidity and reduce deformation.
[0040] The thickness variation region of the upper push plate 1 can be provided with an arc surface transition. The bottom surface of the upper push plate 1 can be provided with a plane, and the thickness variation thereof can be achieved by changing the height of the top surface of the upper push plate 1 .
[0041] Please refer to Figure 2 and Figure 3 The guide groove 110 is provided in the middle of the front top surface of the upper push plate 1 , which is beneficial for the gasket 2 to slide smoothly on the upper push plate 1 .
[0042] The length direction of the guide groove 110 is perpendicular to the length direction of the upper push plate 1 , which facilitates the gasket 2 to slide on the upper push plate 1 in the left-right direction.
[0043] Please refer to Figure 2 and Figure 3 The thickness of the front portion of the push-down plate 3 is smaller than that of the rear portion, which can increase the structural rigidity and reduce deformation.
[0044] The thickness variation region of the push-down plate 3 may be provided with an arc-shaped transition. The bottom surface of the push-down plate 3 may be provided with a plane, and the thickness variation thereof is achieved by varying the height of the top surface of the push-down plate 3 .
[0045] Please refer to Figures 1 to 5 The rear portion of the lower push plate 3 is provided with a second connection hole 310 for connecting and fixing with the knee joint soft tissue balancing device 5. The second connection hole 310 can be provided in the middle position of the rear portion of the lower push plate 3.
[0046] Please refer to Figures 1 to 6 The rear portion of the upper push plate 1 is provided with a first connection hole 120 for connecting and fixing with the knee joint soft tissue balancing device 5. The first connection hole 120 can be provided in the middle position of the rear portion of the upper push plate 1. The width of the front and rear portions of the upper push plate 1 can be greater than the width of the middle portion, that is, the front and rear portions of the upper push plate 1 are wide, and the middle portion is narrow, so as to reduce the interference with the soft tissue during the operation.
[0047] Please refer to Figures 1 to 6 , the front part of the upper push plate 1 is set to be semicircular. The adjacent inner side edges of the two upper push plates 1 are set to be straight, and the outer side edges are set to be semicircular. The rear part of the upper push plate 1 is set to be circular, and the middle part is set to be rectangular strip. The guide groove 110 is set to be a rectangular groove, and the guide protrusion is set to be a rectangular block. The gasket 2 is set to be semicircular. The adjacent inner side edges of the two gaskets 2 are set to be straight, and the outer side edges are set to be semicircular. The front part of the lower push plate 3 is set to be circular, and the middle part and the rear are set to be rectangular. The first connecting hole 120 and the second connecting hole 310 are both set to circular through holes. A connecting rod 4 is set on the rear bottom surface of the lower push plate 3 for connecting the knee joint soft tissue balancing device 5. Two connecting rods 4 are symmetrically arranged. A weight reduction groove is provided on the lower push plate 1.
[0048] The front and back directions in this article refer to Figures 1 to 6 The right and left directions shown in the text refer to Figures 1 to 6 The up and down directions shown in the text refer to Figure 3 and Figure 6 The up and down directions shown in .
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A push plate for a knee joint soft tissue balancing device, characterized in that: include: Two upper push plates (1) are arranged symmetrically and at intervals, and the front outer side edge of the upper push plate (1) is arranged in a convex arc shape; the front top surface of the upper push plate (1) is provided with a guide groove (110); Two gaskets (2) are symmetrically arranged; the top surface of the gasket (2) is arranged as a concave arc surface, the outer side edge is arranged as a convex arc, and the bottom surface is arranged with a guide protrusion; the two gaskets (2) are respectively mounted on the two upper push plates (1), and the guide protrusions are respectively slidably arranged in the guide grooves (110); The lower push plate (3) is arranged below the upper push plate (1); the front end of the lower push plate (3) is open in the middle, and the outer side is arranged in a convex arc shape.
2. The push plate for the knee joint soft tissue balancing device according to claim 1, characterized in that: The thickness of the front portion of the push-up plate (1) is smaller than the thickness of the rear portion.
3. The push plate for the knee joint soft tissue balancing device according to claim 1, characterized in that: The guide groove (110) is opened in the middle of the front top surface of the upper push plate (1).
4. The push plate for the knee joint soft tissue balancing device according to claim 3, characterized in that: The length direction of the guide groove (110) is perpendicular to the length direction of the upper push plate (1).
5. The push plate for the knee joint soft tissue balancing device according to claim 1, characterized in that: A first connecting hole (120) is provided at the rear of the upper push plate (1).
6. The push plate for the knee joint soft tissue balancing device according to claim 5, characterized in that: The first connection hole (120) is opened at the middle position of the rear part of the upper push plate (1).
7. The push plate for the knee joint soft tissue balancing device according to claim 5, characterized in that: The width of the front and rear parts of the push-up plate (1) is greater than the width of the middle part.
8. The push plate for the knee joint soft tissue balancing device according to any one of claims 1 to 7, characterized in that: The thickness of the front portion of the push-down plate (3) is smaller than the thickness of the rear portion.
9. The push plate for the knee joint soft tissue balancing device according to claim 8, characterized in that: A second connecting hole (310) is provided at the rear of the push-down plate (3).
10. The push plate for the knee joint soft tissue balancing device according to claim 9, characterized in that: The second connection hole (310) is opened at the middle position of the rear part of the push-down plate (3).