Patents Assigned to Toyama Precious Metals Co., Ltd.
  • Artificial dental root
    Patent number: 5584693
    Abstract: An artificial tooth root undergoing connective tissue fusion when implanted. The artificial tooth root is columnar-shaped and has a crown (5) at its one end and an apex (6) at its other end. The artificial tooth root has a dual structure consisting of an outer root (7) and an inner root (8). The outer root (7) and the inner rook (8) have axially extending protrusions 4,4' and recesses 3,3' on their lateral sides and are affixed to each other by a resin adhesive (9).
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: December 17, 1996
    Assignees: Katsunari Nishihara, Toyama Precious Metals Co., Ltd.
    Inventor: Katsunari Nishihara
  • Artificial dental root having function of natural dental root
    Patent number: 5219287
    Abstract: An artificial dental root having the function of a natural dental root is characterized in that the artificial dental root is made a shape-memorizing alloy capable of changing the apex morphology of the artificial dental root after implantation so as to stay in the jawbone. The artificial dental root is implanted in an alveolus and the apexes thereof then closely contact the inner surface of the alveolus owing to the shape-memorizing effect thereof to fix the dental root firmly in the alveolus.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: June 15, 1993
    Assignees: Katsunari Nishihara, Toyama Precious Metals Co., Ltd.
    Inventor: Katsunari Nishihara