Femoral positioning component in knee joint fixing platform unicompartmental knee arthroplasty

Abstract

A thighbone positioning component in knee joint fixing platform unicompartmental knee arthroplasty comprises a base station, the upper face and the lower face of the base station are planes, one side of the side edge of the base station is a plane perpendicular to the upper face and the lower face, and the other side of the side edge of the base station is an arc face in smooth transition. A connecting body is arranged on the base table, a marking plate is arranged on the connecting body, the width of the connecting body is smaller than that of the marking plate, and the height of the connecting body is 3 mm; the marking plate is arranged in the middle of the center line between the edges of the two sides of the base station. A vertical penetrating through groove is formed in the middle of the marking plate and is a femoral longitudinal bone nail marking groove. According to the femoral positioning component, the blank in the prior art is filled, the problem that in the knee joint fixing platform unicompartmental knee arthroplasty in the prior art, a femoral positioning component is lacked is solved, accurate and rapid positioning of the femoral operation position is achieved, and rapid marking of the operation position is facilitated. On the basis, the device is simple in structure and low in manufacturing cost and has great medical popularization value.

Description

Technical Field

[0001] The utility model relates to the field of surgical instruments, in particular to a femoral positioning component in a knee joint fixed platform unicompartmental replacement operation. Background Art

[0002] Unicompartmental knee replacement is also known as unicompartmental knee replacement. During the operation, osteotomy is required at the proximal ends of the tibia and femur, that is, the tibia and femur at the knee joint. The specific surgical steps include osteotomy of the upper end of the tibia first, and then aligning the lower end of the femur based on the upper end of the tibia after osteotomy, that is, marking the vertical center line of the lower end of the femur based on the tibial osteotomy platform and the surgical marking line of the lower end of the femur.

[0003] The alignment and positioning process currently relies entirely on the operator's visual inspection and subsequent marking. This approach increases the difficulty of the procedure, prolongs the operation, and requires a high level of operator experience. Furthermore, it can lead to inaccurate alignment. Currently, there is no solution to this problem. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a femoral positioning component in a unicompartmental knee replacement with a fixed platform, which has a simple structure, low cost, can quickly mark the femoral operation position during alignment and positioning, and is easy to use.

[0005] The device includes a base, wherein the upper and lower surfaces of the base are planes, one side of the side is a plane perpendicular to the upper and lower surfaces, and the other side is a curved surface with a smooth transition;

[0006] The effect achieved thereby is that the side of one plane corresponds to the side plane of the tibial osteotomy, and the arcuate side can ensure the safety of the operation and avoid secondary damage to the operation site.

[0007] A connector is provided on the base, a marking plate is provided on the connector, the width of the connector is smaller than the marking plate, and the height of the connector is 3 mm;

[0008] The marking plate is centrally arranged on the center line between the two side edges of the base; a vertical through groove is arranged in the center of the marking plate, which is the femoral longitudinal bone screw marking groove;

[0009] The effect achieved in this way is that the femoral longitudinal bone screw marking groove is equivalent to being centered in the middle position of the base. The middle here refers to the middle between the two side edges of the base. In this case, the base is inserted into the tibial osteotomy platform, and the transverse gap between the connector and the marking plate, that is, the posterior femoral condyle osteotomy marking groove, can be used as the osteotomy reference of the posterior femoral condyle for marking; the position of the femoral longitudinal bone screw marking groove can be used as the center marking groove based on the osteotomy surface. By marking the lower part of the femur along the femoral longitudinal bone screw marking groove, the marking of the vertical center line of the femur can be achieved.

[0010] The beneficial effects of this utility model are as follows: it fills a gap in the existing technology, solves the problem of the lack of a femoral positioning component in the existing knee joint fixed platform unicompartmental knee arthroplasty, achieves accurate and rapid positioning of the femur during the surgical procedure, and facilitates the rapid marking of the surgical location. Furthermore, the device has a simple structure and low cost, and is of great value for medical promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of a femoral positioning component in a fixed-platform unicompartmental knee replacement procedure according to the present invention, and is also a schematic structural diagram from a main viewing angle;

[0012] Figure 2 is based on Figure 1 A schematic diagram of the structure of the top-down perspective;

[0013] Figure 3 is based on Figure 1 Left view of perspective;

[0014] Figure 4 is a schematic structural diagram of Example 2;

[0015] Figure 5 is a schematic diagram of the assembly structure of Example 3;

[0016] Reference numerals:

[0017] 1-Marking plate 2-Femoral longitudinal bone screw marking groove 3-Connector 4-Femoral posterior condyle osteotomy marking groove 5-Base 6-Push hole

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] Reference Figure 1 、 Figure 2 and Figure 3The utility model discloses a femoral positioning component for a fixed platform unicompartmental knee replacement, comprising a base 5, wherein the upper and lower surfaces of the base 5 are planes, one side of the base 5 is perpendicular to the planes of the upper and lower surfaces, and the other side is a smooth arc surface;

[0020] The effect achieved thereby is that the side of one plane corresponds to the side plane of the tibial osteotomy, and the arcuate side can ensure the safety of the operation and avoid secondary damage to the operation site.

[0021] A connector 3 is provided on the base 5, and a marking plate 1 is provided on the connector 3. The width of the connector 3 is smaller than that of the marking plate 1, and the height of the connector 3 is 3 mm.

[0022] The effect achieved in this way is that the connector 3, which is smaller in width than the marking plate 1, will form a femoral posterior condyle osteotomy marking groove 4 with a height of 3 mm between the bottom edge of the marking plate 1 and the top of the base 5. The function of the femoral posterior condyle osteotomy marking groove 4 is to serve as a marking groove for the femoral posterior condyle osteotomy line, that is, after the base 5 penetrates into the tibial osteotomy platform, the connector 3 and the marking plate 1 fit the femur, and the osteotomy position of the femoral posterior condyle can be marked through the femoral posterior condyle osteotomy marking groove 4.

[0023] The marking plate 1 is centrally arranged on the center line between the two side edges of the base 5; a vertical through groove is provided in the center of the marking plate 1, which is the femoral longitudinal bone nail marking groove 2;

[0024] The effect achieved in this way is that the femoral longitudinal bone nail marking groove 2 is equivalent to being centrally arranged in the middle position of the base 5. The middle here refers to the middle part between the two side edges of the base 5. In this case, the base 5 is inserted into the tibial osteotomy platform, and the position of the femoral longitudinal bone nail marking groove 2 can be used as the center marking groove based on the osteotomy surface. By marking the lower part of the femur along the femoral longitudinal bone nail marking groove 2, the marking of the vertical center line of the femur can be realized; and the horizontal gap between the connector 3 and the marking plate 1, that is, the femoral posterior condyle osteotomy marking groove 4, can be used as the osteotomy reference of the femoral posterior condyle for marking.

[0025] Furthermore, the marking plate 1 is a curved plate.

[0026] Preferably, the marking plate 1 is a curved plate body arranged to fit the curvature of the femoral condyle.

[0027] In Example 1, the base 5, connector 3 and marking plate 1 are integrated.

[0028] Example 2, based on Example 1, with reference to the accompanying drawings Figure 4The femoral positioning component is differentiated according to the setting position of the marking plate, and is provided with two specifications. One is that the connector 3 is set on the front part of the base 5, and the other is that the connector is set on the rear part of the base 5, and the directions of the protruding arc surfaces of the marking plate 1 are opposite.

[0029] The effect achieved by this is that, as the above two specifications of the femoral positioning components, refer to the accompanying drawings of the specification Figure 4 When the marking plate 1 faces the same direction, the curved side edges of the base 5 face oppositely, that is, the above two specifications correspond to the treatment of the left knee joint and the right knee joint respectively.

[0030] Example 3, refer to the accompanying drawings Figure 5 , a slide groove is provided in the center of the top of the base 5, and the slide groove is a groove body along the length of the base 5; the center mentioned here refers to the center position between the two side edges of the base 5;

[0031] A connector 3 is slidably provided in the slide groove, and the connector 3 is integrally connected to the marking plate 1 .

[0032] The effect achieved thereby is that the position and orientation of the marking plate 1 can be flexibly adjusted so that a single device can be applied to both the left and right knee joints.

[0033] In Example 4, the femoral positioning component is provided with various sizes and specifications.

[0034] Preferably, the femoral positioning member is provided with at least three sizes, including size 1:

[0035] The thickness of the base 5 is 9 mm, the length of its flat side is 45 mm, and the width between the two sides is 22.5 mm;

[0036] Specification 2:

[0037] The thickness of the base 5 is 9 mm, the length of its flat side is 50 mm, and the width between the two sides is 25 mm;

[0038] Specification 3:

[0039] The base 5 has a thickness of 9 mm, a length of a flat side thereof of 55 mm, and a width between the two sides thereof of 27.5 mm.

[0040] Furthermore, a pushing hole 6 is provided on the curved side of the base 5 .

[0041] The effect achieved thereby is that the surgical instrument is coordinated with the pushing hole 6 to control the device to enter the osteotomy platform of the tibia.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A femoral positioning component for use in fixed-platform unicompartmental knee replacement surgery, comprising an abutment, characterized in that: The upper and lower surfaces of the base are planes, one side of the side is a plane perpendicular to the upper and lower surfaces, and the other side is a curved surface with a smooth transition; A connector is provided on the base, a marking plate is provided on the connector, the width of the connector is smaller than the marking plate, and the height of the connector is 3 mm; The marking plate is centrally arranged on the center line between the two side edges of the base; a vertical through groove is arranged in the center position of the marking plate, which is the femoral longitudinal bone screw marking groove.

2. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 1, characterized in that: The marking plate is a curved plate.

3. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 1, characterized in that: The base, connector and marking plate are integrated into one body.

4. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 3, characterized in that: The femoral positioning component is differentiated according to the setting position of the marking plate and has two specifications. One is that the connector is set on the front part of the base, and the other is that the connector is set on the rear part of the base, and the directions of the protruding arc surfaces of the marking plates are opposite.

5. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 1, characterized in that: A slide groove is provided in the center of the upper surface of the base, and the slide groove is a groove body along the length of the base; A connector is slidably arranged in the slide groove, and the connector is integrally connected with the marking plate.

6. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 1, characterized in that: The femoral positioning component is provided with a variety of sizes and specifications.

7. The femoral positioning component in knee joint fixed platform unicompartmental knee replacement according to claim 1, characterized in that: A pushing hole is also provided on the arc surface side of the base.

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