PROBLEM TO BE SOLVED: To provide an osteosynthetic implant for keeping a corrosion resistance for a long term till a bone union sufficiently advances, and for performing a quick biodegradation by degrading the corrosion resistance.SOLUTION: An osteosynthetic implant 1 comprises: a substrate 2 made of magnesium or a magnesium alloy and a ceramic cover film 3 formed on the surface of said substrate 2 and containing magnesium. Said ceramic cover film 3 includes: a porous cover film lower layer 4 arranged in a region adjacent to the substrate 2 and a skin upper layer 5 covering said porous cover film lower layer 4 to form an outermost surface layer and made denser than the film lower layer 4.COPYRIGHT: (C)2016,JPO&INPIT【課題】骨癒合が十分に進行するまでの長期間にわたって耐食性を保持し、その後は耐食性を低下させて急速に生分解させる。【解決手段】マグネシウムまたはマグネシウム合金からなる基材2と、該基材2の表面に形成されたマグネシウムを含むセラミクス皮膜3とを備え、該セラミクス皮膜3が、基材2に隣接する領域に配される多孔質の皮膜下層部4と、該皮膜下層部4を被覆して最表層を形成する、皮膜下層部4より緻密な皮膜上層部5とを備える骨接合用インプラント1を提供する。【選択図】図1
