Bone Cutting Guide System for Femoral Head Transplantation

A bone cutting guide system for preparing an allograft femoral head for the treatment of osteoarthritis and avascular necrosis of the femoral head, said system comprising:

• a base having a substantially planar bottom side configured for placement on a work surface;
• a head holder disposed atop said base, said head holder having a substantially hemispherical body with a substantially hemispherical interior cavity and inner surface for supporting a femoral head, said body of said head holder including a plurality of fenestrations through which to view a femoral head disposed within said interior cavity, a circumferential upper rim having an upper surface, and coupling structure disposed about said upper rim;
• a generally dome-shaped top defining a generally hemispherical interior volume, said top having a plurality of openings through which a femoral head disposed within said interior volume may be viewed, a circumferential lower rim sized to match that of said upper rim of said head holder, an upwardly extending cylindrical portion with a cylindrical central passage through which to pass a cutting tool and an annular upper rim, and a coupling structure disposed about said lower rim to engage said coupling structure of said upper rim of said head holder;
• and
• a disc-shaped guidewire guide configured to rest securely stop said annular upper rim and partly within said upwardly extending cylindrical portion, said guidewire guide having a center hole through which to pass a guidewire.