Apparatus for determining previous methods for calculating the tibial exit point of the cruciate ligament by the data processing system, and a tibial side exit point of the anterior cruciate ligament

摘要

Purpose of this invention is to decide the optimum position of the exit point of front cruciform ligament substitution in the tibia surface. At the time of this inventing, when the leg is bent, position of the plural points which ardently parallel to the leading edge of the mark is detected, also that position and the course in the femur at that time are decided. When the leg is extended, ardently course of the leading edge of the mark, in the tibia surface is projected to the projection aspect which forms right angle vis-a-vis the longitudinal direction axial boat of the tibia. Furthermore, the exit point in order to maintain the distance where the exit point from projection curved line at least corresponds to the radius of in plant, is selected in inside the territory where it is surrounded by projection curved line. As for this invention, in addition, it regards the device in order to execute the method of this type.