[The evolution of implantology --trends toward a new concept]

The development if implantology during the recent years, relative to the tissue tolerance of various implant materials seems to have improved the chances of success. The disastrous results of prior years have been due to improper techniques leading to unstable biostability between tissue and implant material surface. This insufficiency of biocompatibility is not only biochemical, but also biomechanical as a consequence of very differing physical properties of osseous tissue and implant material. By increasing the surface of the implant material, making it porous, a penetration of fibres and a neoformation of bone could be observed. Thus a conjunctive attachment forms thus securing a closure of tissue around the emerging abutments. At this level, the implant must be considered under the periodontal angle. Marginal irritation must at any price be avoided, thus reducing the chance of epithelial growth into depth. Materials responding to the demands of biocompatibility are certain forms of porcelain, vitrified carbon, titanium, calcium aluminate.