Patent ID: 6859661
Filing Date: 2005-02-22
Classification: A61B,A61F

Abstract:
1. A system for use by a surgeon during implantation in a patient of a tibial implant and of a femoral implant in the course of a knee replacement operation, the system comprising: a computer having memory for holding data relating to size and shape of at least one tibial implant and at least one femoral implant as well as data obtained during pre-operative scanning of the patient relating to the tibia and femur of the patient and also data relating to the three dimensional position and orientation of at least one bone selected from the patient's tibia and the patient's femur obtained during the course of the knee replacement operation; display means for displaying images derived from data held in the memory of the computer relating to the patient's tibia, to the patient's femur, to the at least one tibial implant, and to the at least one femoral implant; registration means for registering the three dimensional position and orientation of the at least one bone during the course of the knee replacement operation; detector means connected to the computer and operatively coupled to the registration means for detecting the position and orientation of the at least one bone and for supplying to the memory of the computer data relating to the three dimensional position and orientation of at least one bone selected from the patient's tibia and the patient's femur obtained during the course of the knee replacement operation; and tensor means for applying tension to the ligaments of the patient's knee in flexion in extension; the computer being configured to display on the display means, at least one more of the following images derived from data held in the memory of the computer and depicting the position and orientation of: