Patella osteotomy navigation template for knee arthroplasty and manufacture method

Abstract

The invention relates to a patella osteotomy navigation template for knee arthroplasty and a manufacture method. The method includes S1, establishing a three-dimensional digital patella model according to medical image data of patients' knees; S2, adopting a least square method to fit a feature plane, and establishing a model coordinate system based on the feature plane; S3, performing three-dimensional form analysis on the patella model, establishing a positioning rod corresponding to the ridge position of the patella model and an osteotomy groove corresponding to the position of the required patella osteotomy surface; S4, acquiring the joint surface form of the patella model, and reversely designing a base plate with the inner surface completely fitting the partial joint surface of the patella; S5, sewing the positioning rod, the osteotomy groove and the base plate, and establishing a patella osteotomy navigation template; S6, utilizing a fast-forming technology to manufacture an entity of the patella osteotomy navigation template. By the aid of the method, the osteotomy depth can be controlled accurately, the osteotomy position can be positioned accurately, and the ideal symmetrical osteotomy surface can be obtained.

Description

technical field [0001] The invention relates to a technique for making a navigation template for surgery, in particular to a patella osteotomy navigation template for knee joint replacement and a manufacturing method thereof. Background technique [0002] With the aging of the population and the increase in sports injuries, the incidence of knee osteoarthritis is increasing. For end-stage osteoarthritis, the current clinically effective treatment is knee arthroplasty. Both patellofemoral arthroplasty and total knee arthroplasty involve the treatment of the patella. During patella replacement, accurate selection of the patella cutting surface, preservation of the appropriate patella thickness, and selection of the appropriate patella prosthesis are key to successful surgery. The key is also the guarantee for patients to obtain satisfactory curative effect after surgery. [0003] The anatomical structure of the patella is irregular, and how to perform accurate and symmetrical...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a patellar osteotomy navigation template for knee joint replacement and a manufacturing method for the problem that the existing navigation template is not suitable for patella osteotomy.

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