Patent ID: 8900241

Claim:
A method for at least one of preparation or machining of a femoral head formed on a neck of a femur including an axis of the neck of the femur, the method comprising: selecting an instrument for at least one of the preparation or the machining of the femoral head, the instrument including: probing forceps including two forcep levers and two probing jaws, wherein the forcep levers are connected to each other at a fulcrum, each of the forcep levers including one of the probing jaws, the forcep levers each having a proximal end and a distal end, the proximal end being disposed away from the fulcrum; and a guide element including a centering axis, the guide element coupled to the probing forceps at first and second coupling points disposed along the centering axis such that the centering axis is disposed in a central plane of the probing forceps independent of an opening angle of the probing forceps; and closing the probing forceps with the probing jaws symmetrically contacting the neck of the femur at opposite sides with respect to the axis of the neck of the femur, wherein the guide element self-adjusts with closing of the probing forceps so that the centering axis is automatically aligned in the middle with respect to the two oppositely disposed sides of the neck of the femur.