Oberflächenfunktionalisierung dentaler Zirkonoxid-Implantate mittels bioaktiver Glasbeschichtungen aus dem System SiO2-Na2O-K2O-CaO-MgO-P2O5

• Surface functionalization of dental zirconia implants using bioactive glass coatings from the system SiO2-Na2O-K2O-CaO-MgO-P2O5

Kirsten, Armin; Fischer, Horst (Thesis advisor); Telle, Rainer (Thesis advisor)

Aachen : Publikationsserver der RWTH Aachen University (2015)
Dissertation / PhD Thesis

Aachen, Techn. Hochsch., Diss., 2014

Abstract

Dental implants usually exhibit a microstructured surface to improve their osseointegration behavior. However, such microstructures can cause inflammation once they protrude out of the jawbone into the oral cavity. A degradable glass coating on a smooth zirconia implant could reduce the risk of inflammation. Therefore the microstructured surface should degrade in saliva to uncover a smooth surface which is easily cleanable afterwards. To achieve this goal, novel glasses were synthesized, sprayed as slurry onto zirconia implants, sintered and microstructured. Bond strength of the glass coatings and bending strength of the substrate material was investigated. Bioactivity, degradation behavior and cytocompatibility of the glasses were analyzed. The novel glass coatings survived the insertion tests unscathed. The coated zirconia showed a distinct higher strength with a comparable Weibull modulus compared to the microstructured implant material. The glass coatings were bioactive, degradable and cytocompatible. These in vitro results reveal a high potential of the novel glass coatings for a reduction of inflammation risk of dental implants. However, this behavior has to be confirmed by subsequent studies in vivo.

Institutions

• Division of Materials Science and Engineering [520000]
• Chair of Ceramics and Institute of Mineral Engineering [524110]
• [542000-3]