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Contact between the biological environment and biomaterials takes place at their surfaces. The biocompatibility of a material is determined by interactions at the interface between implant and biological system. The physicochemical surface properties of the materials used, for example, chemical composition, wettability, surface energy and electrical surface charge, therefore play an important role. Within the framework of the investigations described here, specific modifications of the surfaces properties of titanium are effected using various methods with the aim of achieving a positive influence on cell growth and cell attachment. To characterize the physicochemical surface properties, X-ray photoelectron spectroscopy (XPS) have been used. In addition to the clearly altered chemical composition of the modified material surface, it proved possible to determine significant changes in the thermodynamic properties with the aid of contact angle measurements and the determination of surface energy. On the basis of these results, important information about possible interactions at the interface between implant and tissue can be obtained.

biomedizinische technik

Charakterisierung der Eigenschaften unterschiedlich modifizierter Titanoberflächen für die zahnärztliche Implantologie - Teil 1: Oberflächenanalytische Verfahren - Characterization of the Properties of Variously Modified Titanium Surfaces for Dental Implants - Part 1: Methods of Surface Analysis