PATTERNING APPARATUS FOR SHAPE RETURN MOLD, MASTER FORM OF ORTHOPEDIC IMPLANT MATERIAL, AND ORTHOPEDIC IMPLANT MATERIAL OF SHAPE RETURN MOLD

摘要

PURPOSE:To achieve a patterning of an orthopedic implant material quickly and accurately by providing a graduated straight bar having a specified range of diameter and length using a shape memory alloy such as a Ti-Ni based one to facilitate the bending of a master from or the like. CONSTITUTION:A patterning apparatus of a shape return mold as master form of orthopedic implant material is mounted at a part requiring a shaping such as vertebrae, rear head bone, cervical vertebrae or lumbus vertebrae and used as a master form in the patterning of the orthopedic implant material to apply a proper correction stress to the part. In this case, a Ti-Ni based, Cu based or polyisoprene based shape memory alloy is sued to softly make a graduated straight bar or a graduated rectangular or oval bar-shaped body with diameter of 2-6mm and a length of 3-40cm. For example, the straight bar 1 employs a shape memory alloy of about 50at% Ti and about 50at% Ni. The diameter and length of the bar are set at 4mm and 20cm, respectively, and a graduation 2 is provided on the outer circumference thereof. This facilitates the bending or the like of the master form, thereby achieving a quick and accurate patterning.