Total knee arthroplasty thighbone stable osteotomy guide plate and osteotomy assembly

Abstract

The utility model relates to a total knee arthroplasty thighbone stable osteotomy guide plate and an osteotomy assembly, the total knee arthroplasty thighbone stable osteotomy guide plate comprises a guide plate main body, the guide plate main body is provided with a matching part, and the matching part comprises a fitting part capable of being matched with different parts of a thighbone; a posterior condyle osteotomy inspection groove and a guide plate positioning hole are formed in the top of the guide plate main body, and a far-end osteotomy groove is formed in the middle of the guide plate main body. The utility model can be adapted to the prosthesis of a personalized patient, avoids excessive tissue stripping, is convenient for doctors to use in an operation, and reduces the trauma of the patient.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a femoral stabilization osteotomy guide and osteotomy assembly for total knee replacement. Background Art

[0002] Knee osteoarthritis is relatively common in clinical work. Total knee replacement is an effective way to eradicate late-stage knee joint lesions and greatly improve the patient's quality of life.

[0003] The traditional surgical method uses intramedullary positioning to indirectly obtain the patient's femoral mechanical axis through eversion of the distal anatomical axis. However, the use of multiple tools such as distal osteotomy guides and four-in-one guides cannot flexibly adjust the medial and lateral osteotomy amounts to achieve ligament balance. Anterior notches or excessive posterior condylar osteotomy may also occur. The entire traditional surgical method is complicated and tedious, and is highly traumatic.

[0004] Furthermore, while existing 3D-printed personalized osteotomy guides have seen some progress, offering personalized positioning osteotomy methods that avoid the significant trauma of intramedullary positioning and mechanical axis precision issues, they often involve a one-size-fits-all distal vertical osteotomy. Furthermore, they lack stability, and subsequent manipulations still require the surgeon's experience. Therefore, further challenges remain, such as simplifying the surgical process and improving surgical precision. Utility Model Content

[0005] The purpose of this application is to provide a femoral stabilization osteotomy guide and osteotomy assembly for total knee replacement, which can be adapted to the prosthesis of personalized patients, avoid excessive tissue stripping, facilitate the doctor's use during the operation, and reduce patient trauma.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a femoral stabilization osteotomy guide for total knee replacement, comprising a guide body, wherein the guide body is provided with a matching portion, wherein the matching portion includes a fitting portion that can adapt to different parts of the femur;

[0007] The top of the guide plate body is provided with a posterior condyle osteotomy inspection groove and a guide plate positioning hole, and the middle of the guide plate body is provided with a distal osteotomy groove.

[0008] In an optional embodiment, the fitting portion includes a front fitting surface, and inner and outer fitting areas;

[0009] The inner and outer fitting areas include an anterior outer fitting area, an anterior inner fitting area, a distal outer fitting area and a distal inner fitting area.

[0010] In an optional embodiment, the guide plate body is provided with anterior condyle fixing holes, the anterior condyle fixing holes are provided in pairs, and the opening direction of the anterior condyle fixing holes is parallel to the slotting direction of the distal osteotomy slot;

[0011] The femoral prosthesis is provided with a matching femoral guide plate and a four-in-one guide plate. The hole spacing between the anterior condyle fixation holes and the distance from the hole to the osteotomy groove are consistent with the parameters of the matching femoral guide plate.

[0012] The four-in-one guide plate is provided with positioning piles, the hole spacing of the guide plate positioning holes is the same as the distance of the positioning piles, and the hole spacing of the guide plate positioning holes and the distance from the hole to the posterior condyle of the femur are consistent with the parameters of the four-in-one guide plate.

[0013] In an optional embodiment, a side reinforcement hole is provided on the side of the anterior condyle fixation hole, and the side reinforcement hole is arranged to intersect with the opening direction of the anterior condyle fixation hole.

[0014] In an optional embodiment, an anterior condyle fixing nail and a lateral fixing nail are passed through the anterior condyle fixing hole and the lateral reinforcement hole, and the guide plate body is fixedly mounted on the femur through the anterior condyle fixing nail and the lateral fixing nail.

[0015] In an optional embodiment, a guide plate positioning nail is further included, and the guide plate positioning nail can be movably passed through the guide plate positioning hole and detachably nailed to the femoral condyle.

[0016] In an optional embodiment, the guide plate body is connected to a protruding block via a connecting block, the posterior condyle osteotomy inspection groove vertically passes through the protruding block, and the guide plate positioning hole is provided on the connecting block.

[0017] In an optional embodiment, the connecting blocks and the guide plate positioning holes are respectively arranged in pairs, and the two connecting blocks are spaced apart and bridged in the gap between the protruding block and the guide plate body.

[0018] In an optional embodiment, a pressing ring is provided between the two anterior condyle fixing holes. The pressing ring protrudes from the side wall of the guide plate body and includes two elliptical rings that are stacked inside and outside.

[0019] In a second aspect, the present invention provides an osteotomy assembly comprising the femoral stabilization osteotomy guide for total knee replacement according to any one of the aforementioned embodiments.

[0020] The total knee replacement femoral stabilization osteotomy guide and osteotomy assembly in this application can be stably and reliably positioned and installed on the patient's femoral condyle surface, ensuring the accuracy of distal femoral osteotomy, and at the same time facilitating the subsequent positioning and installation of the traditional four-in-one guide.

[0021] Combined with the posterior condyle osteotomy inspection groove, the doctor can evaluate whether the amount of posterior condyle osteotomy is sufficient during the operation, and at the same time, the posterior condyle osteotomy inspection groove can be used to guide the posterior femoral condyle osteotomy.

[0022] By setting the guide plate body to a structural form that follows the contour of the anterior condyle of the femoral prosthesis, excessive tissue stripping is avoided, which facilitates the doctor's use during the operation and reduces patient trauma.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the lateral structure of the femoral stabilization osteotomy guide for total knee replacement in this application;

[0026] Figure 2 Schematic diagram of the inner structure of the femoral stabilization osteotomy guide for total knee replacement in this application;

[0027] Figure 3 This is a schematic diagram of the status of the femoral stabilization osteotomy guide during total knee replacement;

[0028] Figure 4 A schematic diagram of the status from another perspective.

[0029] icon:

[0030] 1-Guide plate body; 2-Distal osteotomy groove; 3-Anterior condyle fixation hole; 4-Lateral reinforcement hole; 5-Anterior fitting surface; 6-Anterior lateral fitting area; 7-Anterior medial fitting area; 8-Distal medial fitting area; 9-Distal lateral fitting area; 10-Guide plate positioning hole; 11-Posterior condyle osteotomy inspection groove; 12-Guide plate identification; 13-Connecting block; 14-Protruding block; 15-Pressing ring. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0033] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] The femoral stable osteotomy guide for total knee replacement in this application is mainly used in total knee replacement surgery. Specifically, a suitable femoral prosthesis is selected through three-dimensional planning, and a personalized femoral osteotomy guide is designed based on the femoral prosthesis. It fits the patient's anterior, anteromedial, anterolateral, and distal femoral medial and lateral condyle bone surfaces to achieve a stable positioning effect and ensure the accuracy of distal osteotomy.

[0035] See also Figure 1-Figure 2 The femoral stabilization osteotomy guide for total knee replacement in the present invention has a main structure including a guide body 1, on which a matching portion is provided, and the matching portion includes a fitting portion that can adapt to different parts of the femur.

[0036] The purpose of the fitting section is to ensure a better fit of the osteotomy guide to the femur, ensuring reliable positioning and stable installation. The fitting section includes multiple fitting areas that adapt to different parts of the femur, ensuring three-dimensional stability of the osteotomy guide.

[0037] The top of the guide plate body 1 is provided with a posterior condyle osteotomy inspection groove 11 and a guide plate positioning hole 10 , and the middle of the guide plate body 1 is provided with a distal osteotomy groove 2 .

[0038] The posterior condyle osteotomy inspection slot 11 is mainly used for doctors to conduct inspections during surgery. By inserting a banana slice into the posterior condyle osteotomy inspection slot 11, it is possible to evaluate whether the patient's posterior condyle osteotomy amount is sufficient. At the same time, the posterior condyle osteotomy inspection slot 11 can also serve as an osteotomy slot. The knife can be inserted into the posterior condyle osteotomy inspection slot 11 to guide the osteotomy of the posterior femoral condyle and enhance the flexibility and adjustability of the osteotomy operation during surgery.

[0039] The guide plate positioning hole 10 is mainly used for positioning the subsequent traditional osteotomy guide plate, specifically for determining the placement position of the four-in-one guide plate, and then completing the remaining osteotomy of the femur to achieve the ideal effect consistent with the preoperative plan.

[0040] The distal osteotomy groove 2 provided in the middle of the guide plate body 1 can perform osteotomy on the femoral condyle after the guide plate body 1 is fixed, which is beneficial for implantation of the femoral prosthesis after the excess bone is removed.

[0041] In one specific embodiment, from the perspective of ensuring stable installation of the guide plate body 1, the fitting portion includes the front fitting surface 5, and inner and outer fitting areas.

[0042] Specifically, the front side fitting surface 5 and the inner and outer fitting areas are mainly used to fit the inner side wall or edge of the guide plate body 1 to the femoral condyle. Further, the front side fitting surface 5 is mainly used to fit the guide plate body 1 to the anterior femoral condyle surface to play a positioning role.

[0043] Preferably, the inner and outer fitting areas include a front outer fitting area 6, a front inner fitting area 7, a distal outer fitting area 9 and a distal inner fitting area 8.

[0044] The anterolateral fitting area 6 fits with the anterolateral condyle of the femur, and the anteromedial fitting area 7 fits with the anteromedial condyle of the femur. The above two fitting areas have the effect of enhancing positioning.

[0045] The distal medial fitting area 8 fits with the distal medial condyle of the femur, and the distal lateral fitting area 9 fits with the distal lateral condyle of the femur. The above two fitting areas play a role of positioning and supporting.

[0046] Through the above-mentioned fitting parts, the osteotomy guide can fit with the patient's anterior, anteromedial, anterolateral, and distal femoral medial and lateral condyle bone surfaces to achieve a stable positioning effect and ensure the accuracy of distal osteotomy.

[0047] In another specific embodiment, from the perspective of ensuring that the osteotomy guide is fixed on the femur, an anterior condyle fixation hole 3 is provided on the guide body 1. The osteotomy guide can be positioned and fixed by implanting an anterior condyle fixation nail in the anterior condyle fixation hole 3. The anterior condyle fixation holes 3 are arranged in pairs, including two oppositely arranged ones, which can enhance the fixation effect.

[0048] The opening direction of the anterior condyle fixation hole 3 is parallel to the slotting direction of the distal osteotomy slot 2, which is convenient for removing the guide plate when balancing the ligament and increasing the amount of osteotomy during surgery, and matching traditional osteotomy tools.

[0049] The present invention's femoral stabilization osteotomy guide for total knee replacement is designed primarily based on the shape of the patient's distal femur, corresponding to the femoral prosthesis. The specific structure and shape of the osteotomy guide are then tailored to the individualized femoral prosthesis. This design also allows for integration with conventional tools used with femoral prostheses, facilitating intraoperative adjustments.

[0050] Specifically, the femoral prosthesis is provided with a matching femoral guide plate and a four-in-one guide plate. The matching femoral guide plate and the four-in-one guide plate are specifically traditional matching tools corresponding to femoral prostheses of different brands and parameters after the femoral prosthesis is determined.

[0051] The hole spacing between the anterior condyle fixation holes and the distance from the holes to the osteotomy groove are consistent with the parameters of the matching femoral guide plate. By setting the parameters of the osteotomy guide plate in this application to the same form as the parameters of the traditional matching femoral guide plate, osteotomy can be better performed according to the determined femoral prosthesis, which facilitates intraoperative adjustment.

[0052] In order to better fix the osteotomy guide, in this embodiment, a side reinforcement hole 4 is provided on the side of the anterior condyle fixation hole 3, and the side reinforcement hole 4 is arranged to cross the opening direction of the anterior condyle fixation hole 3.

[0053] By implanting side fixing nails in the side reinforcement holes 4, the osteotomy guide can be reinforced and fixed, so that the side fixing nails in the side reinforcement holes 4 and the anterior condyle fixing nails in the anterior condyle fixing holes 3 form a relative crossing angle, which can better fix the osteotomy guide.

[0054] The anterior condyle fixing nails and the lateral fixing nails passing through the anterior condyle fixing hole 3 and the lateral reinforcement hole 4 can effectively fix the guide plate body 1 on the femur, thereby creating the necessary conditions for precise osteotomy.

[0055] The osteotomy guide in the present invention is mainly used to position and pave the way for subsequent traditional osteotomy guides. Preferably, the osteotomy guide also includes a guide positioning pin, which can be movably passed through the guide positioning hole 10 and detachably nailed to the femoral condyle.

[0056] The guide plate positioning hole 10 is used to determine the placement position of the traditional four-in-one guide plate, thereby completing the remaining osteotomy of the femur. After the guide plate body 1 is securely installed on the femur, the guide plate positioning pins can be inserted along the guide plate positioning hole 10 and nailed to the femoral condyle. The guide plate positioning pins are then removed, and the pin holes on the femoral condyle are retained, thereby providing an installation and positioning basis for the traditional four-in-one guide plate.

[0057] The guide body 1 is connected to a protruding block 14 via a connecting block 13. The posterior condyle osteotomy inspection groove 11 vertically penetrates the protruding block 14, and the guide positioning hole 10 is provided on the connecting block 13. This arrangement enables the protruding block 14 to correspond to the position of the posterior femoral condyle, which is conducive to evaluating the amount of posterior condyle osteotomy.

[0058] The connecting blocks 13 and the guide plate positioning holes 10 are arranged in pairs, and the two connecting blocks 13 are spaced apart to bridge the gap between the protruding block 14 and the guide plate body. On the one hand, this can ensure the overall structural strength of the osteotomy guide plate, and on the other hand, it can facilitate the formation of the paired guide plate positioning holes 10, thereby enhancing the positioning effect of the four-in-one guide plate.

[0059] Based on the positioning angle of the guide plate positioning hole 10 to the four-in-one guide plate, positioning piles are provided on the four-in-one guide plate. The hole spacing of the guide plate positioning holes 10 is the same as the spacing of the positioning piles, and the hole spacing of the guide plate positioning holes 10 and the distance from the guide plate positioning holes 10 to the posterior condyle of the femur are consistent with the parameters of the four-in-one guide plate, which can also facilitate intraoperative adjustments and perform osteotomy more accurately.

[0060] A pressing ring 15 is provided between the two anterior condyle fixing holes 3. The pressing ring 15 protrudes from the side wall of the guide body 1 and comprises two oval rings that are nested inside and outside. This ring prevents slipping and allows the surgeon to assist in pressing the osteotomy guide, facilitating the osteotomy operation.

[0061] The distal osteotomy groove 2 in the present invention mainly guides the distal femoral osteotomy, thereby facilitating the removal of excess bone for the installation of the femoral prosthesis. After the osteotomy guide is fixed to the femur, the osteotomy knife is inserted into the distal osteotomy groove 2 to perform a specific osteotomy operation.

[0062] The present invention's femoral stabilization osteotomy guide for total knee replacement is designed to meet the individual needs of different patients. Conventional procedures involve first performing an osteotomy, then adapting the size of the osteotomy to the desired femoral prosthesis. However, conventional sizes cannot meet the individual femoral shape requirements of each patient.

[0063] The femoral stabilization osteotomy guide for total knee replacement in this application first designs the corresponding femoral prosthesis based on the shape of the patient's distal femur, and then designs the specific structural shape of the osteotomy guide based on the personalized femoral prosthesis. After the excess femur is cut through the osteotomy guide, the personalized femoral prosthesis can be accurately implanted, thereby improving the treatment effect. By setting the guide body 1 to the same contour as the femoral prosthesis, excessive tissue stripping is avoided and patient trauma is reduced.

[0064] A guide plate identification 12 of the osteotomy guide plate is also provided on the outside of the guide plate body 1. Through precise personalized customization and combined with the information of the guide plate identification 12, the unique applicable object of the osteotomy guide plate is matched.

[0065] Combine Figure 3-Figure 4 During use of the osteotomy guide, first insert a banana chip into the posterior condyle osteotomy inspection slot 11 to assess the accuracy of the posterior condyle osteotomy. Next, insert the guide positioning pins along the guide positioning holes 10 of the four-in-one guide. The pins are then removed, leaving the pin holes in the femoral condyle intact. Finally, perform the distal femoral osteotomy along the distal osteotomy slot 2, remove the osteotomy guide, insert the four-in-one guide, and complete the remaining osteotomy according to the reference surgical method.

[0066] Compared with the existing osteotomy guide, the total knee replacement femoral stabilization osteotomy guide in this application provides personalized and precise osteotomy. The guide body 1 is designed according to the planned prosthesis to avoid excessive stripping of soft tissue during surgery and reduce trauma; the guide is provided with an anterior condyle fixation hole 3, which can be used with traditional tools, and reinforced side reinforcement holes 4 are provided on the side to enhance the stability of the guide fixation; the guide is provided with a posterior condyle osteotomy inspection groove 11, which is convenient for evaluating the amount of posterior condyle osteotomy; the four-in-one guide positioning hole 10 on the distal condyle, combined with traditional supporting prosthesis tools, accurately implements the planning plan.

[0067] The present invention also provides an osteotomy assembly including the above-mentioned femoral stabilization osteotomy guide for total knee replacement, which can avoid the doctor's barehand operation and reduce clinical accidents; the osteotomy guide is simple and practical, greatly shortening the doctor's learning curve; the prosthesis model adapted to the patient is planned, avoiding repeated measurements during the operation and shortening the operation time.

[0068] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0069] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A femoral stabilization osteotomy guide for total knee replacement, characterized in that: The guide plate comprises a main body, wherein the main body is provided with a matching portion, wherein the matching portion comprises a fitting portion capable of matching with different parts of the femur; The top of the guide plate body is provided with a posterior condyle osteotomy inspection groove and a guide plate positioning hole, and the middle of the guide plate body is provided with a distal osteotomy groove.

2. The femoral stabilization osteotomy guide for total knee replacement according to claim 1, characterized in that: The bonding part includes a front bonding surface, and inner and outer bonding areas; The inner and outer fitting areas include an anterior outer fitting area, an anterior inner fitting area, a distal outer fitting area and a distal inner fitting area.

3. The femoral stabilization osteotomy guide for total knee replacement according to claim 1, characterized in that: The guide plate body is provided with anterior condyle fixing holes, the anterior condyle fixing holes are arranged in pairs, and the opening direction of the anterior condyle fixing holes is parallel to the slotting direction of the distal osteotomy slot; The femoral prosthesis is provided with a matching femoral guide plate and a four-in-one guide plate. The hole spacing between the anterior condyle fixation holes and the distance from the hole to the osteotomy groove are consistent with the parameters of the matching femoral guide plate. The four-in-one guide plate is provided with positioning piles, the hole spacing of the guide plate positioning holes is the same as the spacing of the positioning piles, and the hole spacing of the guide plate positioning holes and the distance from the hole to the posterior condyle of the femur are consistent with the parameters of the four-in-one guide plate.

4. The femoral stabilization osteotomy guide for total knee replacement according to claim 3, characterized in that: A side reinforcement hole is provided on the side of the anterior condyle fixing hole, and the side reinforcement hole is arranged to intersect with the opening direction of the anterior condyle fixing hole.

5. The femoral stabilization osteotomy guide for total knee replacement according to claim 4, characterized in that: Anterior condyle fixing nails and lateral fixing nails are passed through the anterior condyle fixing hole and the lateral reinforcement hole, and the guide plate body is fixedly mounted on the femur through the anterior condyle fixing nails and the lateral fixing nails.

6. The femoral stabilization osteotomy guide for total knee replacement according to claim 1, characterized in that: It also includes a guide plate positioning nail, which can movably pass through the guide plate positioning hole and be detachably nailed to the femoral condyle.

7. The femoral stabilization osteotomy guide for total knee replacement according to claim 3, characterized in that: The guide plate body is connected to a protruding block via a connecting block, the posterior condyle osteotomy inspection groove vertically penetrates the protruding block, and the guide plate positioning hole is provided on the connecting block.

8. The femoral stabilization osteotomy guide for total knee replacement according to claim 7, characterized in that: The connecting blocks and the guide plate positioning holes are respectively arranged in pairs, and the two connecting blocks are spaced apart and bridged in the gap between the protruding block and the guide plate body.

9. The femoral stabilization osteotomy guide for total knee replacement according to claim 7, characterized in that: A pressing ring is provided between the two anterior condyle fixing holes. The pressing ring protrudes from the side wall of the guide plate body and comprises two elliptical rings which are stacked inside and outside.

10. An osteotomy assembly, characterized in that: The invention comprises the femoral stabilization osteotomy guide for total knee replacement according to any one of claims 1 to 9.

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