PROSTHESIS WITH CENTRALIZER AND CENTRALIZER USED THEREWITH

摘要

PROBLEM TO BE SOLVED: To enable the stem proximal end of a prosthesis to be guided into a medullary cavity by composing the guide device by a sleeve which accepts a guide device and has an opening part to place the prosthesis to the proximal end or a determined position in the proximal end direction. SOLUTION: This prosthesis 1 is supplied with a stem in a condition that the stem in a sleeve 3 shape is sealed into the proximal end inserted into a medullary cavity filled with cement. The wall of the sleeve 3 is made thicker toward the proximal end 6 neighboring the proximal end of the stem to form an outward protruding balcony 8 and a dent face 9. The proximal end opening part 10 of the sleeve 3 is formed into a shape substantially rectangular and flat dent face 9 curved toward the proximal end 8 and inside. When the stem is inserted, the stem is made so that the part from the distal end of the sleeve 3 to a point neighboring the proximal cut end of a bone is covered. The distal end of the sleeve 3 is not necessarily required to be covered. Thus the stem proximal end can be guided into a medullary cavity to be fixed by cement.