Zahnfee

The bonding technique is frequently used in implantology in the area of the jaw. Since dental implants must not be loaded during the healing period, they consist of several parts. The implant heals into the jaw before the abutment and the crown are connected to the implant after it has healed. The abutments are also often made in several parts for aesthetic reasons. This involves bonding the titanium base to a ceramic abutment, which repeatedly leads to failures in the practice.
The aim of the project is to investigate the durability and durability of bonded hybrid abutments made of ceramics and titanium, depending on the bonding surface pretreatment methods used, the adhesives used, the production process and the harmful influences during use.
In the project, near-component test specimens for adhesion optimization and testing are to be developed. For this purpose, an appropriate test device for destructive adhesion testing will be designed and manufactured. The bonding device for the production of test specimens close to the component with reproducible adhesive layers and the possibility of non-contact deformation measurement during loading in the testing machine completes the test setup. The test specimens are used to qualify previously selected pretreatment processes and adhesives. In addition, the test specimens are subjected to application-oriented cleaning and sterilisation procedures in order to determine their influence on the adhesive strength and durability. Downstream tests with regard to temperature changes and resistance to food (different pH values) will simulate the application. A test in accordance with DIN EN ISO 14801 (Dentistry - Implants - Dynamic fatigue testing for endosseous dental implants (ISO 14801:2007); German version EN ISO 14801:2007) will subsequently supplement the qualification of the bonded products.

The procedure presented here is intended to make it possible to qualify the bonding of two-piece abutments made of titanium and ceramic with regard to the loads and joining parameters. This is done with the background of a sufficient resistance of the connections without failure in use. The project includes the development of requirement profiles, the use of suitable and cost-effective surface pretreatment processes, qualified laboratory and practical tests with integration of manufacturers and users (primarily kmU) and consistently aims at the development of efficient and practical solutions.