TITANIUM SURFACE MODIFICATION WITH DRY PROCESS FOR DENTAL IMPLANTS

摘要

Since dental implants are used in contact with various tissues, it is necessary to have optimum surface compatibility with the host bone tissues, subepithelial connective tissues, and epithelial tissues. Furthermore, dental implants are required to remain plaque-free at the surface exposed to the oral cavity. Such materials can be created under well-controlled conditions by modifying the surfaces of metals that are in contact with those tissues. "Tissue-compatible implants", which are compatible with all host tissues, have to integrate with bone tissues, easily form hemidesmosomes, and prevent the bacterial adhesion. The research work aimed at developing the tissue-compatible implants by modifying titanium surfaces using a dry process for closely adhering to titanium substrate and ensuring a good wear resistance, including the ion beam dynamic mixing (thin calcium phosphates), ion implantation (Ca~+, N~+, F~+), titania spraying, ion-plating (TiN, alumina), and ion beam mixing (Ag, Sn, Zn, Pt) with Ar~+.