| 摘要 |
<p>PURPOSE:To maintain the fixed state stable over a long period of time after embedment and to prevent the generation of the dislodgment, rotation, etc., of a core material by constituting the above material of the core material and a porous layer and forming the core material to a noncircular sectional shape in a part of the sectional shape thereof. CONSTITUTION:The artificial tooth root material is formed with the porous layer on the surface of the core material. The core has a bar shape and is preferably formed by using bioinert carbon fiber reinforced carbon material having high strength, titanium, alumina, etc. The porous layer may be made of such a material which allows the biotissue to advance into the pores of the porous layer to form the secure connective tissue when embedded into a living body and allows the connective tissue to cause calcification and change to the osteostructure; for example, the porous layer consisting of alumina and the carbonaceous porous layer or the like formed by depositing pyrolysis carbon on a non-woven fabric of carbon fibers, etc., are exemplified. The sectional shape in at least a part of the core material has the noncircular sectional shape and is not made into a threaded structure. Since the porous layer is formed on such core material, the peeling, rotation, etc., at the boundary between the core material and the porous layer is prevented.</p> |
