| 摘要 |
<p>PURPOSE:To provide an artificial dental root excellent in strength and toughness and having the excellent compatibility with soft and hard tissues by forming a calcium phosphate type porous ceramic layer to the outer surface part of the intraosseous implant part of a core body and mounting a cylindrical body composed of an alumina single crystal to the outer surface of the contact part with soft tissue of said core body. CONSTITUTION:A core body 1 is made of a metal material such as titanium, a titanium alloy of vitallium. A cylindrical body 2 composed of an alumina single crystal constitutes the outer surface part coming into contact with soft tissue (tooth gum) and a calcium phosphate porous ceramic layer (porous ceramic layer) 3 forms the outer surface part of the intraosseous implant part coming into contact with a bone. The cylindrical body 2 and the porous ceramic layer 3 are bonded to and integrated with the core body 1 by an adhesive such a glass having a coefficient of thermal expansion approximate each other. Since the alumina single crystal has the compatibility with a tooth gum, the danger of infection from a dental neck part is reduced. The mechanical bonding strength with a bone is increased by the invasion of a bone in the pores of porous calcium phosphate type ceramic.</p> |
