CALCIUM PHOSPHATE CERAMICS LAYER-CLAD TITANIUM OR TITANIUM ALLOY IMPLANT AND PREPARATION THEREOF

摘要

PURPOSE: To improve peeling resistance by preparing the title implant used in the fields of dentistry and orthopedics in such a way that a part of calcium phosphate ceramics-clad layer covering the surface of Ti or Ti alloy-made implant main body is embedded in the surface of the main body. ;CONSTITUTION: In preparing an artificial hip joint, at first, calcium phosphate powder synthesized by a wet process is calcinated at high temp. and is ground by means of a wet ball mill and a binder is incorporated therein and the mixture is dispersed into a slurry, which is then spray-dried to obtain a powder and after it is granulated, it is calcined to obtain a roundish rough powder 2 of tricalcium phosphate. Then, after this rough powder 2 is heated and is sprinkled over the surface of a wax pattern 1 with the same shape as the artificial joint, the rough powder 2 stuck on the surface of the wax pattern 1 is pushed to prepare a composite wax pattern from which a part of the rough powder 2 is projected and exposed. Then, after a casting matrix for preparation is prepd. by using this composite wax pattern 3, a Ti alloy is cast therein to obtain a Ti alloy-made artificial hip joint wherein the rough powder 2 of tricalcium phosphate is embedded.;COPYRIGHT: (C)1993,JPO&Japio