Zirconia-based dental restorations are manufactured to serve in the aggressive environment of the oral cavity for a certain period of time, which normally spans 712 years. In order to obtain a high and durable bonding of dental cement to a chemically inert zirconia framework, the bonding surface should be cleaned and roughened, which is commonly achieved using sandblasting with 50–110μm airborne particles at a moderate pressure. Since tetragonal zirconia exhibits a stressinduced transformation, the abraded surface will be not only damaged but also constrained. The phase transformation contributes to the surface strengthening and enhanced ageing resistance, whereas impactinduced surface flaws act as the stress concentrators that may become strength determining. In this lecture, the sandblasting of dental zirconia ceramics will be elucidated from an engineering perspective, i.e., by considering the impact energy as a function of the process variables on the one hand, and the material’s response on the other.
B.04 Guest lecture
COBISS.SI-ID: 26508071The research was aimed at developing an alternative material, i. e. a moderately porous YTZP ceramic exhibiting a substantially reduced elastic modulus and, at the same time, a sufficiently high strength for dental applications. The results strengthened nowadays understanding of sintering of nano/microsized powders with bimodal particle size distribution, furthermore the working hypothesis of enhanced neck growth due to nanoparticle addition wass confirmed and, a novel dental ceramic exhibiting low elastic modulus and practical flexural strength was developed.
D.09 Tutoring for postgraduate students
COBISS.SI-ID: 261783552In this invited talk we were the first to report on the "In-vivo" ageing of dental zirconia ceramics in oral cavity.
B.04 Guest lecture
COBISS.SI-ID: 25487655In this proceedings, contemporary clinical and scientific achievements are published that were presented by slovenian and invited foreigne speakers.
C.02 Editorial board of a national monograph
COBISS.SI-ID: 268977408In this presentation, dental zirconia ceramics were elucidated from an engineering perspective, by considering the interrelationship between the composition, microstructure and the mechanical properties of yttria partially stabilized tetragonal zirconia (YTZP) ceramics, as well as the mechanisms and the kinetics of the reactions leading to a material’s degradation under thermal and mechanical cyclic loading in a chemically aggressive environment of the oral cavity.
B.05 Guest lecturer at an institute/university
COBISS.SI-ID: 26663975