Patent ID: 8221477

Claim:
A method for creating a positive-fit connection capable of load-bearing to a tissue part in a human or animal body, the tissue part comprising first and second surfaces, the method comprising the steps of: providing an implant comprising a central support with a proximal end and a distal base plate, the support and the base plate consisting of a first material, which is not liquefiable under implantation conditions, and the implant further comprising a second material, which is biocompatible, has thermoplastic properties, and is liquefiable by mechanical oscillation, the second material being arranged around the central support, providing a tissue opening reaching from the first surface to the second surface of the tissue part, the opening having a form which is adapted to the base plate and the second material, positioning the implant with the base plate facing forward from the first surface through the opening so that the base plate is positioned beyond the second surface of the tissue part and fixing the positioned implant, impinging a proximal face of the second material with mechanical oscillation and simultaneously pressing it against the base plate for a time sufficient for liquefying at least a part of the second material and for pressing it into surface unevennesses, cavities or pores of a wall of the tissue opening, letting the second material pressed into said surface unevennesses, cavities or pores re-solidify and, in a re-solidified state, to constitute the positive-fit connection.