PURPOSE This study was conducted to evaluate the effects of different phosphate monomer-containing primers on the shear bond strength between yttria-tetragonal zirconia polycrystal (Y-TZP) ceramics and MDP-containing self-adhesive resin cement. MATERIALS AND METHODS Y-TZP ceramic surfaces were ground flat with #600-grit SiC paper and divided into six groups (n = 10). They were treated as foll...

It has been suggested that patients should accept the use of the air abrasion technique over the conventional handpiece due to the reduced need for anesthesia. Technologies for both air abrasion and the conventional rotary handpiece have, in recent decades, seen major improvements, but there are no recent scientific publications that evaluate the patient's preference for these two technologies ...

This study investigates the effect of ZrB2 additions on microstructure, thermal stability, and thermo-mechanical wear resistance polycrystalline diamond. Following high-pressure high-temperature (HPHT) sintering, ZrB2-PCD material binder phase consisted cobalt-boride (Co2B B6Co23) phases. In-situ PXRD TEM vacuum annealing experiments observed that onset bulk graphitisation occurred above 1000 °...

The results are described of ongoing field and laboratory experiments to estimate losses from shingle beaches due to abrasion. Field abrasion experiments of two exotic lithologies (quartzite and limestone) used as tracers on two flint shingle beaches at Telscombe and Saltdean in East Sussex, UK, have been carried out over 23 months, resulting in 985 weight loss measurements. Relationships betwe...

The paramagnetic Meissner eeect (PME), in which the eld-cooled-magnetization (FCM) of superconducting samples is positive below the super-conducting transition temperature T c , has been observed in certain ceramic and single-crystal samples of the high-T c cuprate superconductors and more recently in disk-shaped Nb samples. Through systematic investigations of the conditions for observing the ...

Statement of the problem. The fracture of acrylic resin dentures remains an unsolved problem. Therefore, many investigations have been performed and various approaches to strengthening acrylic resin, for example, the reinforcement of heat-cured acrylic resin using glass fibers, have been suggested over the years. But problems such as poor workability, rough surface, poor adhesion of glass fiber...

BACKGROUND In the repair process achieving high bond strength between the new and old resin based materials is necessary for clinical longevity. This study compared the effect of three different mechanical surface treatments (air abrasion, Nd:YAG laser and diamond bur) on the repair bond strength of giomer. MATERIAL AND METHODS In this in vitrostudy, 125 cylindrical giomer samples were used. ...