US 6,921,264 B2 · Implant to be implanted in bone tissue or in bone tissue supplemented with bone substitute material

Abstract

An implant (1) to be implanted in bone tissue, e.g. a dental implant or an implant for an orthopedic application, comprises surface regions (4) of a first type which have e.g. osseo-integrative, inflammation-inhibiting, infection-combating and/or growth-promoting properties, and surface regions (8) of a second type which consist of a material being liquefiable by mechanical oscillation. The implant is positioned in an opening of e.g. a jawbone and then mechanical oscillations, e.g. ultrasound is applied to it while it is pressed against the bone. The liquefiable material is such liquefied at least partly and is pressed into unevennesses and pores of the surrounding bone tissue where after resolidification it forms a positive-fit connection between the implant and the bone tissue. The surface regions of the two types are arranged and dimensioned such that, during implantation, the liquefied material does not flow or flows only to a clinically irrelevant degree over the surface regions of the first type such enabling the biologically integrative properties of these surface regions to start acting directly after implantation. The implant achieves with the help of the named positive fit a very good (primary) stability, i.e. it can be loaded immediately after implantation. By this, negative effects of non-loading are prevented and relative movements between implant and bone tissue are reduced to physiological measures and therefore have an osseo-integration promoting effect.

Claims48

Dependent claims

An implant for implantation in human or animal bone tissue or in bone tissue supplemented with bone substitute material, wherein at least a part of the implant surface is adapted to comes into contact with the bone tissue, wherein said part of the implant surface comprises surface regions (4) of a first type and surface regions (8) of a second type being different from the surface regions (4) of the first type, wherein the surface regions (8) of the second type comprise a material which is liquefiable by mechanical oscillation and with the aid of which on implantation by mechanical oscillation the implant is stabilized at least primarily in the bone tissue, wherein the surface regions (8) of the first type are equipped for a further clinical function being different from the function of primary stabilization and wherein the surface regions (4, 8) of the first type and of the second type are dimensioned and arranged in a manner such that the surface regions of the first type remain at least partly free from liquefied material on implantation by mechanical oscillation.

A method for implanting an implant in bone tissue or in bone tissue supplemented with bone substitute material, the method comprising the steps of:

providing an implant having an implant surface of which at least a contact part is adapted to come into contact with the bone tissue, wherein said contact part of the implant surface comprises surface regions of a first type and surface regions of a second type that are different from the surface regions of the first type, wherein the surface regions of the second type comprise a material that is liquefiable by mechanical oscillation, and wherein the surface regions of the first type are equipped for a further clinical function that is different from the function of primary stabilization;
positioning the implant on or in the bone tissue;
applying mechanical oscillation to the implant and at the same time pressing the implant against the bone tissue, thereby liquefying at least part of the liquefiable material and pressing the liquefied material into unevenesses and pores of the bone tissue;
re-solidifying the liquefied material to form a connection with the bone tissue for primarily stabilizing the implant in the bone tissue;
wherein the surface regions of the first and second type are dimensioned and arranged in a manner such that the surface regions of the first type remain at least partly free from liquefied material when mechanical oscillation is applied to the implant and the implant is pressed against the bone tissue;
and
wherein the surface regions of the second type are equipped and arranged for the further clinical function taking effect on the bone tissue immediately after the step of re-solidifying.

4 more elements

A method for implanting an implant in bone tissue or in bone tissue supplemented with bone substitute material, the method comprising the steps of:

providing an implant having an implant surface of which at least a contact part is adapted to come into contact with the bone tissue, wherein said contact part of the implant surface comprises surface regions of a first type and surface regions of a second type that are different from the surface regions of the first type, wherein the surface regions of the second type comprise openings to an inside cavity of the implant, the inside cavity containing a material which is liquefiable by mechanical oscillation, and wherein the surface regions of the first type are equipped for a further clinical function that is different from the function of primary stabilization;
positioning the implant on or in the bone tissue;
applying mechanical oscillation to the implant and at the same time applying a force to the liquefiable material in the cavity, thereby liquefying at least part of the liquefiable material and pressing the liquefied material through the openings in the surface regions of the second type and into unevenesses and pores of the bone tissue;
re-solidifying the liquefied material to form a connection with the bone tissue for primarily stabilizing the implant in the bone tissue,
wherein the surface regions of the first and second type are dimensioned and arranged in a manner such that the surface regions of the first type remain at least partly free from liquefied material when the mechanical oscillation is applied to the implant and the liquefied material is pressed through the openings;
and
wherein the surface regions of the second type are equipped and arranged for the further clinical function taking effect on the bone tissue immediately after the step of re-solidifying.

4 more elements

Dependencies are inferred from the claim text.

Implant to be implanted in bone tissue or in bone tissue supplemented with bone substitute material

Life of this patent

Implant to be implanted in bone tissue or in bone tissue supplemented with bone substitute material

Life of this patent

Abstract

Claims48