Marking template for installing a custom replacement device for resurfacing a femur and associated installation method

摘要

A replacement device for resurfacing a joint surface of a femur and a method of making and installing such a device is provided. The custom replacement device is designed to substantially fit the trochlear groove surface, of an individual femur, thereby creating a “customized” replacement device for that individual femur and maintaining the original kinematics of the joint. The top surface is designed so as to maintain centrally directed tracking of the patella perpendicular to the plane established by the distal end of the femoral condyles and aligned with the center of the femoral head.

主权项

1. A method comprising:
a. receiving a surgical instrument further comprising a surgical tool guide, said surgical instrument being a custom surgical instrument for a particular patient manufactured using pre-operative data, wherein the pre-operative data is based on a three dimensional geometry of a distal portion of a femur and a pre-operatively planned spatial arrangement of the surgical tool guide relative to the distal portion, the surgical instrument based on the pre-operative data to mount to the particular patient's distal portion of the femur in a pre-defined spatial arrangement, the surgical instrument further comprising a three-dimensional tissue contacting geometry, wherein the surgical tool guide is in a pre-defined spatial arrangement relative to the three-dimensional tissue contacting geometry; b. placing the surgical instrument on the distal portion of the particular patient's femur; and c. using the surgical tool guide to guide a tool.