Osteotomy guide device for unicompartmental knee arthroplasty

Abstract

The invention relates to the technical field of unicompartmental knee arthroplasty, in particular to an osteotomy guide device for unicompartmental knee arthroplasty and aims to solve the problem thatexisting osteotomy guide devices cannot realize different osteotomy angles to meet different osteotomy requirements. Thus, the osteotomy guide device comprises a positioning part and a guiding part which are connected in a pivoted manner, the positioning part can be matched with a tibial plateau on one side so that the pivot axis is parallel or coplanar with the tibial plateau on one side, an osteotomy groove extending in the direction of the pivot axis is formed in the guiding part, fixing parts for fixing the positioning part and the guiding part to tibia are arranged at the positioning part and the guiding part, and the osteotomy guide device also comprises an angle indicating component for indicating the size of the included angle between the central plane of the osteotomy groove andthe tibial plateau on one side. By the arrangement, an operator can adjust the included angle between the guiding part and the positioning part, so that the central plane of the osteotomy groove is parallel or forms a certain included angle with the tibial plateau on a non-osteotomy side.

Description

technical field [0001] The invention relates to the technical field of unicompartmental knee replacement, and specifically provides an osteotomy guide device for unicompartmental knee replacement. Background technique [0002] Unicompartmental knee arthroplasty is an effective method for the treatment of unicompartmental knee diseases. During the operation, the diseased bone tissue of the tibial plateau on the affected side needs to be resected first. Typically, osteotomy thickness is estimated with the aid of an osteotomy guide. The guide includes a telescopic vertical rod, the lower end of the vertical rod is fixed at the ankle, the upper end of the vertical rod is provided with an osteotomy platform, and the thickness of the osteotomy is adjusted by adjusting the telescopic length of the telescopic rod. [0003] However, some patients have tibial varus, and the degree of tibial varus varies from patient to patient. When the tibia has no varus or the degree of varus is ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, the existing osteotomy guide cannot realize different osteotomy angles to meet different osteotomy requirements, the present invention provides an osteotomy for unicompartmental knee arthroplasty A guiding device, the osteotomy guiding device includes a pivotally connected positioning part and a guiding part, the positioning part can cooperate with one side of the tibial plateau so that the pivot axis is parallel or coplanar with the one side of the tibial plateau, the guiding part An osteotomy groove extending along the direction of the pivot axis is provided on the part, and a fixing member for fixing the positioning part and the guiding part to the tibia is provided on the positioning part and the guiding part. The bone guiding device further includes an angle indicating member for indicating the angle between the central plane of the osteotomy groove and the tibial plateau on one side

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