Total knee replacement digital osteotomy guiding plate manufacturing method and device

Abstract

The invention relates to a total knee replacement digital osteotomy guiding plate manufacturing method and device. The total knee replacement digital osteotomy guiding plate manufacturing method comprises that based on a three dimensional digital model of an osteotomy position of a present patient, the surface data of the bone binding face being close to the osteotomy position is extracted, and the surface data is fitted to a curved surface then is thickened to obtain a customized positioning plate; a standard guiding plate corresponding to the osteotomy position is called, and the standard guiding plate is provided with an osteotomy groove with a guiding surface positioned on the osteotomy plane; digital combination of the customized positioning plate and the standard guiding plate is completed in a computer; and the actual product is manufactured by means of a material increase manufacturing method. The total knee replacement digital osteotomy guiding plate comprises two parts containing the customized positioning plate and the standard guiding plate, the problem that the completely-customized design cannot be manufactured easily, and the completely-standard osteotomy guide plate cannot be used easily and is low in precision is solved, the customized total knee replacement guiding plate is designed simply and manufactured intensively, and therefore the design and manufacture cost of the guiding plate is reduced, and the complexity of the operation auxiliary apparatus is reduced.

Description

technical field [0001] The invention relates to a navigation template for surgery, in particular to a method and device for making a digital bone cutting guide plate for total knee replacement. 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. [0003] Due to individual differences, more than 130 surgical instruments are used in traditional surgery, such as mechanical guides for intramedullary and extramedullary positioning, bone cutting plate guides, etc. Even so, in the operation, the surgeon still needs to rely on the naked eye, feel and experience for anatomical positioning, and to perform alignment and alignment by manual marking, flexion and extension of the knee joint, etc., which itself has a lot of subjectivity. Although these mechanical positioning and guiding devices ha...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for making a digital osteotomy guide plate for total knee replacement that can realize fast and accurate osteotomy in view of the problems of unreasonable structure of the existing navigation template and high cost of design and manufacture

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