Patents Assigned to Twenty One Inc.
  • Dental implant
    Patent number: 6227860
    Abstract: A dental implant that includes a cylindrical body which can be positively secured against micromotion within a bore in a jawbone by a spindle-shaped expansion mechanism and further secured against the contamination by microorganism through a gap in an internal channel of tubular portion by a compressive contact mechanism.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: May 8, 2001
    Assignee: Twenty One Inc.
    Inventor: Sumiya Hobo