Double d key locking prosthesis

A modular prosthesis to be used in hip replacement comprising:

• an intramedullary rod having a distal end adapted for insertion into the intramedullary canal of the femur and a tapered proximal end, said tapered proximal end having a smaller circumference than said distal end, said tapered proximal end having the smallest circumference at said proximal end, said proximal end having a screw threaded blind bore along a longitudinal axis of said intramedullary rod,
• a trochanter having a narrow distal end and a larger proximal end with a shaped through bore from said distal end to said proximal end, said circumference of said trochanter bore and said circumference of said proximal end of said intramedullary rod adapted to telescope together forming a rotationally secure connection, said larger proximal end of said trochanter having a recess,
• a neck having an extension on the distal end adapted to be inserted into the proximal end of said through bore of said trochanter, said distal end of said neck having a planar surface including a blind bore, said extension on said distal end of said neck and said proximal end of said through bore in said trochanter adapted to telescope together to form a rotationally adjustable connection,
• a key lock adapted to be inserted in said recess in said trochanter and said blind bore in said neck to fix said rotationally adjustable connection,
• said neck having a through bore, said proximal end of said through bore having a countersunk bore, said distal end of said through bore formed as said extension and adapted to telescope over the proximal end of said intramedullary rod, and
• a screw threaded bolt adapted to be disposed in said countersunk bore and threadably engaged with said screw threads in said proximal end of said intramedullary rod forming a locked integral prosthesis.