Personalized knee joint osteotomy guide plate assembly and design method thereof

Abstract

The invention provides a personalized knee joint osteotomy guide plate assembly, which comprises a personalized knee joint distal femur osteotomy guide plate, a personalized knee joint proximal tibiaosteotomy guide plate, an osteotomy groove metal assembly, and a location hole metal sleeve. The personalized knee joint osteotomy guide plate assembly ingeniously utilizes personalized osteophyma ofthe intraoperative patient as a location marker of the distal femur osteotomy guide plate and the proximal tibia osteotomy guide plate without using articular cartilage for fixing, accordingly intraoperative positioning and entrapment are easy and are not affected by articular cartilage. When the distal femur osteotomy guide plate and the femoral cortex are fixed and entrapped well, the position is where the osteotomy guide plate is arranged and the distal femur osteotomy is conducted, so that no medullary opening location is required, surgical procedure is reduced, and time is saved.

Description

technical field [0001] The invention relates to the field of medical tools, in particular to a personalized knee joint osteotomy guide plate assembly and a design method thereof. Background technique [0002] The knee osteotomy guide is used for the osteotomy process in total knee arthroplasty. The traditional guides are all non-personalized designs, which more or less do not meet the needs of patients. The relatively emerging 3D printing personalized knee osteotomy The bone guide plate has been improved in this regard. It is designed and manufactured based on medical imaging data, and simulates the operation and formulates the operation plan before the operation. During the operation, the precise osteotomy is performed according to the preoperative plan. [0003] The existing 3D printed personalized knee osteotomy guide plate has some shortcomings in the processing of articular cartilage factors. MR data cannot accurately extract cartilage modeling, especially when cartilag...

AI Technical Summary

Problems solved by technology

[0003] The existing 3D printed personalized knee osteotomy guide plate has some shortcomings in the processing of articular cartilage factors. MR data cannot accurately extract cartilage modeling, especially when cartilage degeneration occurs, the registration and fusion of CT and MR data is also difficult. It will cause errors and troubles, so that the thickness of the articular cartilage cannot be accurately estimated during the design of the guide plate, thus affecting the accuracy of the osteotomy. Although some guide plates can estimate the thickness of the cartilage, removing the cartilage during the actual operation will increase the operation time and be inaccurate. All current 3D printed personalized knee osteotomy guides cannot complete the entire osteotomy process for the uneven development of the femoral condyle, malunion of old fractures of the knee, tibia, and femur, and large bone defects. There is a guide plate that does not take into account the soft tissue balance around the knee joint and the flexion-extension gap is rectangular; in addition, the imported guide plate is expensive and takes a long time to produce and transport. Therefore, the existing guide plate needs to be improved

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