Joint revision surgery apparatus

A joint revision surgery apparatus comprising:

• (a) a surgical knife blade guide block having two half sections which when assembled form an assembled surgical knife blade guide block having a centrally located cavity and a plurality of forwardly located surgical knife blade guide slots, wherein each half section has a front portion and a rear portion, and each half section has a top surface and a bottom surface;
• (b) a stem trunnion securing member mountable within said central cavity and secured to said assembled surgical knife blade guide block;
• (c) an L-shaped adjustable blade guide plate moveably located within said plurality of forwardly located surgical knife blade guide slots, wherein said L-shaped adjustable blade guide plate includes an upper section and a lower section;
• (d) and further wherein said upper section of said L-shaped adjustable blade guide plate includes a guide plate retaining screw slot and is secured to said assembled knife blade guide block by a threaded guide plate retaining screw extending through said L-shaped adjustable blade guide plate upper section and threaded into said guide block assembly, and said lower section of said L-shaped adjustable blade guide plate is configured to be movable to one or more guide slots within said plurality of forwardly located surgical knife blade guide slots;
• (e) one or more surgical knife blade guide slots for accepting surgical knife blades, located in the rear portion of said assembled surgical knife blade guide block;
• and
• (f) a plurality of rigid and flexible, curved and straight surgical knife blades;
• wherein said assembled surgical knife blade guide block is affixed to an implanted femoral stem for extraction by attaching said stem trunnion securing member to the trunnion of said stem, and then said L-shaped adjustable guide plate is adjusted upwardly and downwardly using said retaining screw and said L-shaped adjustable guide plate is adjusted forwardly and backwardly by extending said lower section of said adjustable guide plate into one or more of the plurality of guide slots defined by the guide block assembly, then extending said flexible surgical knife blades down through said forwardly located surgical knife blade guide slots containing the L-shaped adjustable guide plate and extending said rigid surgical knife blades down through said rearward slots to reach the femoral stem and thereby cut the femoral stem free from the femur bone during revision surgery.