CUSTOMIZED ACETABULAR CUP POSITIONING GUIDE AND METHOD OF GENERATING AND EMPLOYING SUCH A GUIDE

摘要

Implementations described and claimed herein provide an arthroplasty system and methods for positioning an acetabular cup implant. In one implementation, the system includes a shape-match hip guide having a patient specific mating region that is a negative of the surface contour of the inside surface of the patient's acetabular cup, and a directional rod that extends generally along the axis of the patient's femoral head and femoral neck. They system can additionally include an outrigger or silo device to aid in the alignment of surgical tools for preparing and implanting of the prosthetic acetabular cup in the patient's acetabular cup. Related methods are also disclosed herein for generating a shape-match guide and implanting an acetabular cup with the guide.

主权项

1. A method of manufacturing a custom acetabular cup positioning guide for use in an arthroplasty procedure on a portion of a hip region of a patient's body, wherein the portion of the hip region includes a patient's acetabular cup, the method of manufacturing comprising:
generating a plurality of two dimensional medical images of the portion of the hip region of the patient's body to undergo the arthroplasty procedure; identifying landmarks on bone boundaries in the two dimensional medical images; identifying a hip axis line by triangulating a plurality of the landmarks in the two dimensional medical images; using a computer processor to generate a three dimensional bone model of the portion of the hip region of the patient's body to undergo the arthroplasty procedure from the plurality of two dimensional medical images, wherein the three dimensional bone model includes a three dimensional model of the patient's acetabular cup; shape-matching an inside surface of the three dimensional model of the patient's acetabular cup relative to the hip axis line; generating the custom acetabular positioning guide based upon the identification of the hip axis line and a negative contour of the inside surface of the three dimensional model of the patient's acetabular cup.