Positioning device for total condylar knee prostheses

摘要

The positioning device for implantation of total condylar knee prostheses comprises a measurement rod (1) with at least two securing arms (2) for lateral securing on the outside of the tibia (T) parallel to the longitudinal axis of the tibia. The measurement rod (1) has a guide rail (9) with a measurement scale (10) and a lockable measurement carriage (11), on which a cutting block (15) for performing the necessary osteotomies is arranged movably in two directions. Accordingly, the cutting block can be displaced and secured in such a way that, by means of the slots present therein, the osteotomy can be performed at the correct position. In order to determine the position, a targeting rod (20) is secured on the measurement rod (1), which targeting rod forms the extension of the measurement rod (1) in the direction of the pelvis and is of such a length that its end reaches as far as the pelvis. Arranged at the upper end of the targeting rod is a movable targeting element (26) which, for adjustment purposes, can be moved and fixed along the targeting rod and at right angles to the sagittal plane. By means of a specific reference point on the pelvic bone, for example a screw in the anterior superior iliac spine, the tibia (T) can be brought into the correct position during the operation. …IMAGE…