Ceramic endosseous implant
AssigneeKyoto Ceramic Co., Ltd.
InventorsMasaya Hirabayashi, Haruyuki Kawahara
Life of this patent
Estimating the term…
Abstract
This disclosure relates to an endosseous implant for use in dental and orthopedic treatment. The implant is a composite structure made of a combination of an outer ceramic member and an inner ceramic core member bonded together by glass cement. After being implanted, new bone tissue and new connective tissue penetrate into the outer member to form a net-like root structure therein, thereby increasing the stability of the implant and at the same time the outer member is reinforced by the inner core member.
Claims23
A ceramic endosseous implant, comprising:
- a composite structural member having a ceramic outer member of polycrystalline alumina ceramic and a ceramic inner core member of single crystalline alumina ceramic;
- said outer member having a generally cylindrical shape and a cavity with micro-apertures on the outer surface thereof for permitting the penetration of a new bone and connective tissue thereinto;
- said inner member, of alumina ceramic, with a post portion adapted to be inserted in said cavity, a flange portion adjacent said post portion for the covering of said cavity, and a mounting post for use in attaching a prothesis;
- and
- said inner core member bonded to said outer member by a heat resistant glass cement having a coefficient of thermal expansion approximating that of alumina ceramic.
A ceramic endosseous implant, comprising:
- a composite structural member having a ceramic outer member of polycrystalline alumina ceramic and a ceramic inner core member of single crystalline alumina ceramic;
- said outer member, having a generally cylindrical shape and a cavity, manufactured to have material distributed therethrough in a predetermined configuration, said material being degradeable by new bone and connective tissue when said implant is inserted into a living being, forming micro-apertures in said outer member into which said new bone and connective tissue may penetrate;
- said inner member of alumina ceramic, configured to reinforce said outer member, with a post portion adapted to be inserted in said cavity, a flange portion adjacent said post portion for the covering of said cavity, and a mounting post for use in attaching a prothesis;
- said inner core member bonded to said outer member by a heat resistant glass cement having a coefficient of thermal expansion approximating that of alumina ceramic.
A ceramic endosseous implant comprising a composite structural member having a ceramic outer member of polycrystalline alumina ceramic and a ceramic inner core member fused together by a glass cement having a coefficient of thermal expansion approximating that of alumina ceramic, said outer member having micro-apertures on the outer surface thereof for permitting the penetration of new bone and connective tissue thereinto, and said inner member made of single crystalline alumina ceramic and configured to reinforce said outer member.
A ceramic outer member, having a cavity, for permanent insertion into body tissues, having an outer surface contacting said tissues and formed to encourage the growth of said tissues into said member, and further having a shape to mechanically engage said tissues during said growth;
- a single crystalline ceramic inner core member shaped to fill said cavity and to provide an protrusion for attaching a prothesis;
- said inner core member permanently affixed to said outer member by a glass cement having coefficient of thermal expansion approximating that of said outer and inner core members.
Dependencies are inferred from the claim text.