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. (WO1998048728) IMPLANT SYSTEM

Pub. No.:    WO/1998/048728    International Application No.:    PCT/SE1998/000729
Publication Date: Fri Nov 06 00:59:59 CET 1998 International Filing Date: Wed Apr 22 01:59:59 CEST 1998
IPC: A61C 8/00
Applicants: ASTRA AKTIEBOLAG (publ)
HANSSON, Stig
Inventors: HANSSON, Stig
Title: IMPLANT SYSTEM
Abstract:
A dental implant system comprising a fixture (301; 401; 501) for implantation in bone tissue (312, 314; 512, 514) of the maxilla or mandible by displacement thereof in a forward direction, the fixture having a forward end, a rearward end (330; 430; 530), and an outer surface (305; 405; 505) which extends between the forward and rearward ends and which forwardly of a predetermined position (307; 407; 507) on the outer surface is adapted for interlocking with bone tissue of the maxilla or mandible; and a superstructure (402) for mounting on the fixture, the superstructure having a forward end for interfacing with the rearward end of the fixture, the forward end of the superstructure and the rearward end of the fixture each presenting interfacing surfaces for interfacing with one another. The rearward end of the fixture and the forward end of the superstructure are so contstructed and dimensioned that a predetermined interfacing surface of the superstructure (423) is able to interface in the forward direction with a predetermined interfacing surface of the fixture (311; 409; 525) which is at a level which is disposed forwardly of the predetermined position on the outer surface. A more favourable stress distribution in the bone tissue adjacent the fixture results.