Total knee arthroplasty tibia osteotomy guide plate and osteotomy assembly

Abstract

The utility model relates to a total knee arthroplasty tibia osteotomy guide plate and osteotomy assembly.The total knee arthroplasty tibia osteotomy guide plate comprises a guide plate body, a guide block and a positioning claw are arranged on the guide plate body, and the extension direction of the guide block corresponds to the direction of a connecting line of a tibia intercondylar ridge and a posterior cruciate ligament dead point; the positioning claw comprises a binding face, the binding face corresponds to a tibia platform, and a tibia front binding face is arranged on the guide plate body. An osteotomy groove used for performing osteotomy on the proximal tibia is formed in the guide plate main body, a fixing hole is formed in the lower part of the osteotomy groove, and the fixing hole is formed in the side wall of the guide plate main body in a penetrating manner. The osteotomy guide plate positioning device can ensure the accuracy and stability of osteotomy guide plate positioning, avoids the defects caused by one-time cutting in a traditional operation, reduces learning curves of doctors, and is simple and practical.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a tibial bone osteotomy guide plate for total knee arthroplasty and an osteotomy assembly. BACKGROUND

[0002] Knee osteoarthritis is more common in clinical work, and total knee arthroplasty is an effective way to eradicate advanced knee joint lesions and greatly improve the quality of life of patients.

[0003] The traditional surgical method adopts intramedullary positioning, which can only be set as vertical osteotomy. If it is adjusted according to the anatomical characteristics of the patient, it completely relies on the experience of the doctor to place it, and the accuracy and stability need to be improved.

[0004] In addition, although the existing 3D printing personalized osteotomy guide plate has also developed in some ways through personalized positioning osteotomy, the exposure range of the tibia is limited, and the positioning is unstable. In this regard, how to simplify the surgical procedure and improve the accuracy of the operation is a further problem to be solved. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to provide a tibial bone osteotomy guide plate for total knee arthroplasty, which can ensure the accuracy and stability of the positioning of the osteotomy guide plate, avoid the disadvantages brought by the traditional one-size-fits-all surgery, and reduce the learning curve of the doctor, and is simple and practical.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the utility model provides a tibial bone osteotomy guide plate for total knee arthroplasty, which comprises a guide plate main body, a guide block and a positioning claw are arranged on the guide plate main body, the extension direction of the guide block corresponds to the direction of the line connecting the tibial intercondylar ridge and the posterior cruciate ligament stop point, the positioning claw comprises a fitting surface, the fitting surface corresponds to the platform of the tibia, and a tibial anterior fitting surface is arranged on the guide plate main body.

[0007] A osteotomy groove for osteotomy of the proximal tibia is arranged on the guide plate main body, and a fixing hole is arranged on the lower part of the osteotomy groove and penetrates through the side wall of the guide plate main body.

[0008] In an optional embodiment, the guide plate main body comprises an osteotomy platform and a guide plate side plate, the guide plate side plate is connected to the bottom of the osteotomy platform, and the osteotomy groove is transversely arranged on the osteotomy platform.

[0009] In an optional embodiment, the tibial anterior fitting surface is arranged on the inner side wall of the guide plate side plate and is used for positioning and fitting with the front side of the tibia.

[0010] In an optional embodiment, the guide block and the positioning claw are connected to the top wall of the osteotomy platform, the positioning claw comprises a first positioning claw and a second positioning claw, and the first positioning claw and the second positioning claw are arranged on two sides of the guide block respectively.

[0011] In an optional embodiment, the fitting surface comprises a tibial plateau lateral fitting surface arranged at the extended end of the first positioning claw and a tibial plateau medial fitting surface arranged at the extended end of the second positioning claw, the tibial plateau lateral fitting surface is used for positioning fitting with the tibial plateau lateral side, and the tibial plateau medial fitting surface is used for positioning fitting with the tibial plateau medial side.

[0012] In an optional embodiment, the fixing hole is arranged in the thickness direction of the wall of the guide plate side plate, and the fixing hole comprises a pair of adjustment fixing holes and a mounting fixing hole.

[0013] In an optional embodiment, the adjustment fixing hole comprises two, the opening directions of the two adjustment fixing holes are arranged in parallel, and the distance between each adjustment fixing hole and the osteotomy groove is the same.

[0014] The guide plate body is correspondingly provided with a tibial tray prosthesis, the tibial tray prosthesis is correspondingly provided with a matched osteotomy guide plate, the matched osteotomy guide plate is provided with matched fixing holes and a matched osteotomy groove which are parallel to each other.

[0015] The hole distance between the adjustment fixing holes is the same as the hole distance of the matched fixing holes, and the distance between the adjustment fixing hole and the osteotomy groove is the same as the distance between the matched fixing hole and the matched osteotomy groove.

[0016] In an optional embodiment, the mounting fixing hole is arranged at the lower part of the adjustment fixing hole, comprises a single channel arranged between the adjustment fixing holes, and the opening direction of the mounting fixing hole is arranged in cross with the opening direction of the adjustment fixing hole.

[0017] In an optional embodiment, the osteotomy platform is provided with a guide plate mark for marking osteotomy guide plate information.

[0018] In a second aspect, the utility model provides a kind of osteotomy assembly, including any one of the total knee replacement tibial osteotomy guide plate in the foregoing embodiment.

[0019] The total knee replacement tibial osteotomy guide plate in the utility model can quickly find the matching position of the osteotomy guide plate and the tibia by corresponding the extension direction of the guide block to the direction of the line of the intercondylar ridge and the posterior cruciate ligament stop point, and ensure the accuracy and stability of the guide plate positioning by combining the fitting surface on the positioning claw and the front fitting surface of the guide plate.

[0020] At the same time, it can be suitable for personalized design and use requirements, and avoid the disadvantages caused by traditional one-size-fits-all surgery.

[0021] Other features and advantages of the present application will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the lateral structure of the tibial bone cutting guide plate for total knee arthroplasty in the present application;

[0024] Figure 2 It is a schematic diagram of the medial structure of the tibial bone cutting guide plate for total knee arthroplasty in the present application;

[0025] Figure 3 It is a schematic diagram of the state of the tibial bone cutting guide plate for total knee arthroplasty in the use process;

[0026] Figure 4 It is a schematic diagram of the state of another view.

[0027] Icon:

[0028] 1-guide plate body; 11-cutting platform; 12-guide plate side plate;

[0029] 2-guiding block;

[0030] 3-positioning claw; 31-first positioning claw; 32-second positioning claw;

[0031] 4-tibial bone front fitting surface;

[0032] 5-cutting groove;

[0033] 6-fixing hole; 61-adjusting fixing hole; 62-mounting fixing hole;

[0034] 7-tibial bone platform lateral fitting surface;

[0035] 8-tibial bone platform medial fitting surface;

[0036] 9-guide plate identification. DETAILED DESCRIPTION

[0037] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0038] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer", etc. are based on the positions or location relationships shown in the drawings or the positions or location relationships in which the products of the present application are usually placed, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be directly connected, or indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] The tibial bone osteotomy guide in the present application is specifically a personalized tibial bone osteotomy guide designed and processed to meet different patient anatomical characteristics.

[0041] In the use process, first, the tibial bone platform varus angle and retroversion angle suitable for the patient are planned and designed by three-dimensional planning, and the appropriate tibial bone support prosthesis is selected based on this, and then the personalized tibial bone osteotomy guide in the present application is designed.

[0042] By setting necessary positioning structures and fitting parts, the accuracy and stability of the installation of the osteotomy guide are ensured.

[0043] Referring to Figures 1-2 The tibial bone osteotomy guide in the present application, the main structure includes a guide plate main body 1, the guide plate main body 1 is provided with a guide block 2 and a positioning claw 3, the extension direction of the guide block 2 corresponds to the direction of the connecting line of the tibial intercondylar ridge and the posterior cruciate ligament stop point, and the position of the osteotomy guide matched with the tibia can be quickly determined.

[0044] The positioning claw 3 mainly plays a positioning role, including a fitting surface, which corresponds to the platform of the tibia, and can reliably install the osteotomy guide on the tibia.

[0045] By setting the tibial front side fitting surface 4 on the guide plate body 1, the tibial front side fitting surface 4 can cooperate with the tibial platform fitting surface on the positioning claw 3, and the osteotomy guide plate can be further accurately and reliably installed.

[0046] From the main function of the osteotomy guide plate, the guide plate body 1 is provided with an osteotomy groove 5 for osteotomy of the proximal tibia, and the lower part of the osteotomy groove 5 is provided with a fixing hole 6 which is arranged through the side wall of the guide plate body 1.

[0047] The osteotomy operation of the proximal tibia can be performed after the guide plate body 1 is positioned and installed on the tibia, which is beneficial to accurately and reliably install the tibial tray prosthesis after osteotomy.

[0048] In one specific embodiment, the guide plate body 1 includes a three-dimensional space structure of the osteotomy platform 11 and the guide plate side plate 12, the guide plate side plate 12 is connected to the bottom of the osteotomy platform 11, and the osteotomy groove 5 is transversely arranged on the osteotomy platform 11.

[0049] Through this arrangement, the structure basis can be provided for the function angle of osteotomy and positioning fitting, and the osteotomy groove 5 can be correspondingly arranged at the platform part of the tibia, which is convenient for osteotomy operation.

[0050] On the basis of the positioning and guiding of the positioning claw 3 and the guide block 2, in order to form the fitting of the osteotomy guide plate and the tibia, the tibial front side fitting surface 4 is arranged on the inner side wall of the guide plate side plate 12, and the tibial front side fitting surface 4 is used for positioning fitting with the front side of the tibia.

[0051] Further, the roots of the guide block 2 and the positioning claw 3 are respectively connected to the top wall of the osteotomy platform 11, and the guide block 2 and the positioning claw 3 respectively protrude outward from the osteotomy platform 11, which can make the guide block 2 and the positioning claw 3 constitute effective and reliable guiding and positioning effects.

[0052] The guide block 2 is specifically a narrow edge bending block structure, and in the design of the tibial tray prosthesis and the osteotomy guide plate based on the anatomical characteristics of the patient as described above, the extension direction of the guide block 2 corresponds to the direction of the line connecting the intercondylar ridge of the tibia and the posterior cruciate ligament stop point, which can quickly determine the installation direction of the osteotomy guide plate.

[0053] At the same time, from the positioning angle, the positioning claw 3 includes a first positioning claw 31 and a second positioning claw 32, the first positioning claw 31 and the second positioning claw 32 are respectively arranged on both sides of the guide block 2, and the fitting surfaces respectively arranged on the first positioning claw 31 and the second positioning claw 32 are combined with the tibial front side fitting surface 4 on the inner side wall of the guide plate side plate 12, which can form three-point contact surfaces of the osteotomy guide plate and the tibia, thereby ensuring the accuracy and stability of the positioning of the osteotomy guide plate to the greatest extent.

[0054] Specifically, the fitting surfaces on the positioning claws 3 mainly correspond to the tibial plateau, and the fitting surfaces on the two positioning claws 3 respectively include a tibial plateau lateral fitting surface 7 arranged at the extended end of the first positioning claw 31 and a tibial plateau medial fitting surface 8 arranged at the extended end of the second positioning claw 32.

[0055] The tibial plateau lateral fitting surface 7 is used for positioning fitting with the tibial plateau lateral side, and the tibial plateau medial fitting surface 8 is used for positioning fitting with the tibial plateau medial side. The two fitting surfaces are mainly used to prevent the osteotomy platform 11 from being tilted backward, and in combination with the tibial anterior fitting surface 4 on the inner side wall of the guide plate side plate 12, a positioning contact fitting relationship between the osteotomy guide plate and the tibia is formed. Further, in combination with the guidance of the guide block 2, the placement position of the osteotomy guide plate can be accurately determined to ensure accuracy.

[0056] From the perspective of installing the osteotomy guide plate, the fixing holes 6 are arranged in the wall thickness direction of the guide plate side plate 12, and the fixing holes 6 include a pair of adjustment fixing holes 61 and an installation fixing hole 62.

[0057] The adjustment fixing holes 61 are mainly used for adjusting the installation position of the osteotomy guide plate, and indirectly adjusting the osteotomy amount of the osteotomy site.

[0058] Specifically, the adjustment fixing holes 61 include two, the opening directions of the two adjustment fixing holes 61 are arranged in parallel, and the distance from each adjustment fixing hole 61 to the osteotomy groove 5 is the same.

[0059] Through this kind of setting mode, it can be applied in cooperation with the conventional general osteotomy guide plate, and it is also beneficial to adjust during the operation, so as to correspond to the osteotomy assembly matched with the tibial tray prosthesis in the subsequent downstream.

[0060] Preferably, based on the selection of the tibial tray prosthesis after obtaining the anatomical characteristics and the design of the osteotomy guide plate in the present application, the guide plate body 1 is correspondingly provided with a tibial tray prosthesis, the tibial tray prosthesis is correspondingly provided with a matched osteotomy guide plate, the matched osteotomy guide plate is provided with a matched fixing hole 6 and a matched osteotomy groove 5 which are parallel to each other.

[0061] In order to facilitate the adjustment of the osteotomy operation of the osteotomy guide plate in the present application to correspond to the osteotomy assembly matched with the tibial tray prosthesis, the hole distance between the adjustment fixing holes 61 is the same as the hole distance of the matched fixing hole 6, and the distance from the adjustment fixing hole 61 to the osteotomy groove 5 on the osteotomy guide plate in the present application is the same as the distance from the matched fixing hole 6 to the matched osteotomy groove 5 on the matched osteotomy guide plate.

[0062] By setting the parameters of the osteotomy guide plate in the present application and the parameters of the conventional matched osteotomy guide plate to be the same, the osteotomy can be better performed according to the determined tibial tray prosthesis, and it is convenient for doctors to adjust during the operation.

[0063] From the perspective of preventing the osteotomy guide plate from sliding during use, the mounting fixing hole 62 is arranged at the lower part of the adjusting fixing hole 61, and includes a separate hole channel arranged between the adjusting fixing holes 61; by arranging the opening direction of the mounting fixing hole 62 to be crossed with the opening direction of the adjusting fixing hole 61, and combining the insertion of the fixing nails in the mounting fixing hole 62 and the adjusting fixing hole 61 respectively, a three-dimensional cross fixing structure can be formed, so that the osteotomy guide plate can be effectively fixed and mounted on the tibia, thereby creating necessary conditions for precise osteotomy.

[0064] The osteotomy guide plate further comprises a guide plate mark 9 arranged on the osteotomy platform 11 and used for marking osteotomy guide plate information; through precise personalized customization, the guide plate mark 9 information is combined to match the unique applicable object of the osteotomy guide plate, so that the demand of personalized application is met.

[0065] Combined with the above, Figures 3-4 In the use process, as a precondition of precise personalized customization, the anatomical varus angle and the retroversion angle of the tibial plateau of the patient are measured through preoperative planning, and the osteotomy varus and retroversion angles of the patient, i.e., the osteotomy surface of the proximal tibia, are designed according to the measurement results.

[0066] Through the guide plate mark 9 information, the unique applicable object of the guide plate is matched, the tibial plateau exposure can easily see the intercondylar ridge of the tibia and the posterior cruciate ligament insertion, and the guide block 2 on the guide plate is co-linear in the same direction, so that the position of the osteotomy guide plate is quickly found, the guide plate placement position is accurately determined through the three fitting areas of the tibial anterior fitting surface 4, the tibial plateau medial fitting surface 8 and the tibial plateau lateral fitting surface 7, and after the fixing nail is placed along the fixing hole 6, the proximal tibial osteotomy is performed.

[0067] The full knee joint replacement tibial osteotomy guide plate in the utility model provides personalized precise osteotomy and avoids the traditional one-size-fits-all osteotomy mode. The guide block 2 of the osteotomy guide plate takes the midpoint of the intercondylar ridge and the posterior cruciate ligament insertion as important reference marks, and is beneficial to positioning. The adjusting fixing hole 61 can be matched with a traditional tool, and is convenient for intraoperative adjustment.

[0068] The utility model also provides a kind of osteotomy assembly comprising the above-mentioned full knee joint replacement tibial osteotomy guide plate, which can avoid doctor's manual operation and reduce clinical accidents; the osteotomy guide plate is simple and practical, which greatly shortens the learning curve of doctors; the prosthesis model adapted to the patient is planned, which avoids repeated measurement during operation and shortens the operation time.

[0069] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0070] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tibial osteotomy guide plate for total knee arthroplasty, characterized in that, The guide plate body is provided with a guide block and a positioning claw, the extension direction of the guide block corresponds to the direction of the line connecting the tibial intercondylar ridge and the posterior cruciate ligament stop point, the positioning claw includes a fitting surface corresponding to the platform of the tibia, and the guide plate body is provided with a tibial front fitting surface; The guide plate body is provided with an osteotomy groove for osteotomy of the proximal tibia, and the lower part of the osteotomy groove is provided with a fixing hole penetrating through the side wall of the guide plate body.

2. The total knee arthroplasty tibial cut guide of claim 1, wherein, The guide plate body includes an osteotomy platform and a guide plate side plate connected to the bottom of the osteotomy platform, and the osteotomy groove is transversely arranged on the osteotomy platform.

3. The total knee arthroplasty tibial cut guide of Claim 2, wherein, The tibial front fitting surface is arranged on the inner side wall of the guide plate side plate and is used for positioning and fitting with the front side of the tibia.

4. The total knee arthroplasty tibial cut guide of Claim 2, wherein, The guide block and the positioning claw are connected to the top wall of the osteotomy platform, the positioning claw includes a first positioning claw and a second positioning claw, and the first positioning claw and the second positioning claw are arranged on the two sides of the guide block respectively.

5. The total knee arthroplasty tibial cutting guide of Claim 4, wherein, The fitting surface includes a tibial platform outer fitting surface arranged at the extension end of the first positioning claw and a tibial platform inner fitting surface arranged at the extension end of the second positioning claw, the tibial platform outer fitting surface is used for positioning and fitting with the outer side of the tibial platform, and the tibial platform inner fitting surface is used for positioning and fitting with the inner side of the tibial platform.

6. The total knee arthroplasty tibial cutting guide of Claim 2, wherein, The fixing hole is arranged in the thickness direction of the guide plate side plate, and the fixing hole includes a pair of adjustment fixing holes and a mounting fixing hole.

7. The total knee arthroplasty tibial cutting guide of Claim 6, wherein, The adjustment fixing holes are two, the opening directions of the two adjustment fixing holes are arranged in parallel, and the distance of each adjustment fixing hole to the osteotomy groove is the same. The guide plate body is correspondingly provided with a tibial tray prosthesis, the tibial tray prosthesis is correspondingly provided with a matched osteotomy guide plate, the matched osteotomy guide plate is provided with a pair of matched fixing holes and a matched osteotomy groove in parallel, The distance between the adjustment fixing holes is the same as the distance between the matched fixing holes, and the distance from the adjustment fixing hole to the osteotomy groove is the same as the distance from the matched fixing hole to the matched osteotomy groove.

8. The total knee arthroplasty tibial cutting guide of Claim 6, wherein, The mounting fixing hole is arranged below the adjustment fixing hole and includes a separate hole channel arranged between the adjustment fixing holes, and the opening direction of the mounting fixing hole is arranged in cross with the opening direction of the adjustment fixing hole.

9. The total knee arthroplasty tibial cutting guide of Claim 2, wherein, The osteotomy platform is provided with a guide plate mark for marking osteotomy guide plate information.

10. An osteotomy assembly comprising: The full knee replacement tibial osteotomy guide plate includes the guide plate of any one of claims 1-9.

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