Patent ID: 6692530
Filing Date: 2004-02-17
Classification: A61F

Abstract:
In a modular hip prosthesis kit including a plurality of different sized intramedullary rods, trochanters, and necks, said plurality of intramedullary rods, trochanters, and necks being adapted for interchangeable assembly to form a particular hip prosthesis with specific characteristics, said specific characteristics including a longitudinal axis and an anteversion angle, said angle fixed by rotational adjustment of said intramedullary rods, trochanters and necks about the longitudinal axis,the improvement comprising said intramedullary rods each having a proximal end and a distal end, each of said proximal ends and said distal ends adapted to be telescoped together for rotational movement, each of said proximal ends having a bore with internal threads, each of said distal ends having a blind bore, a plurality of split sleeves each adapted to be disposed between a telescoped proximal end and distal end, each of said split sleeves adapted to rigidly fix said proximal end and said distal end upon longitudinal translation of said proximal end and said distal end, a plurality of bolts and a plurality of jack screws, each of said jack screws adapted to be threaded in said threaded bore of each of said proximal end and contacting said blind bore of each of said distal ends whereby turning of said jack screw compresses said slit sleeve, and each of said bolts adapted to be threaded in said threaded bore of each of said proximal end and adapted to engage each of said necks whereby turning of said bolts rigidly joins each of said trochanters and each of said distal ends.