Patent ID: 8533968

Claim:
A method for determining the compatibility between an adapter, which is to be inserted into a third-party ball joint provided for replacement, and an outer cone of a prosthesis shaft of a modular joint prosthesis which is inserted into the femur during revision surgery, wherein a test piece of a set of test pieces having different inner cones, and having a marker and a length measuring scale, is placed on the outer cone of the shall of the joint prosthesis, and the adapter which fits on the outer cone of the joint prosthesis is subsequently determined by successively testing the inner cones for compliance with a minimum permissible distance between the end faces of the outer cone of the shaft of the joint prosthesis and the inner cone, and for compliance with a predefined permissible insertion depth of the outer cone of the shaft of the joint prosthesis into the inner cone of the test piece.