Implants for creating connections to tissue parts, in particular to skeletal parts, as well as device and method for implantation thereof

摘要

Implants for forming a positive connection with human or animal parts include a material, such as thermoplastics and thixotropic materials, that can be liquefied by means of mechanical energy. The implants are brought into contact with the tissue part, are subjected to the action of ultrasonic energy while being pressed against the tissue part. The liquefiable material liquefies and is pressed into openings or surface asperities of the tissue part so that, once solidified, the implant is positively joined thereto. The implantation involves the use of an implantation device that includes a generator, an oscillating element, and a resonator. The generator causes the oscillating element to mechanically oscillate, and the element transmits the oscillations to the resonator. The resonator is used to press the implant against the tissue part to transmit oscillations to the implant.

主权项

1. A method for creating a positive-fit connection capable of load-bearing to a tissue part in a human or animal body, the method comprising the steps of:
providing an implant comprising a sleeve of a first material, which is not liquefiable under implantation conditions, the sleeve having a distal end, a proximal end, a cavity with a proximal opening, and perforations which connect the cavity with outer sleeve surfaces to be brought into contact with the tissue part, said implant further comprising a second material being biocompatible, transformable from a solid state into a liquid state by mechanical oscillation, and disposed in the cavity of the sleeve and having a proximal surface, providing an opening in the tissue part, the tissue opening being adapted to the sleeve, positioning the implant with the distal end of the sleeve forward in the tissue opening, impinging the second material provided in the sleeve cavity with energy for a time sufficient for transforming at least a part of the second material from the solid state to the liquid state to thereby liquefy at least part of the second material and pressing the second material against the distal end of the sleeve and pressing liquefied parts of the second material through the sleeve perforations into surface unevennesses, cavities or pores in an inside 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, constitute the positive-fit connection.