PURPOSE The aim of the present study was to assess the influence of pre-treatments of zirconia by sandblasting and/or heat treatment on the flexural strength of zirconia and debonding/crack-initiation strength of porcelain-veneered zirconia ceramic. MATERIALS AND METHODS Zirconia ceramic specimens were divided into four groups according to treatment (grinding as controls, sandblasting, heat t...

The vulnerability of the UHV porcelain arrester is very high under strong earthquake. To rise seismic reliability of the UHV porcelain arrester, a new type lead damper, which is a new patent product, is installed at the bottom of the equipment. To investigate the damping effect of the dampers, the experimental research and finite element analysis on seismic behavior of the UHV porcelain arreste...

Extensive restorations of single anterior teeth are accomplished by using porcelain jacket crowns or porcelain enamel or plastic veneer restorations supported by an alloy restoration that is luted to the tooth. The porcelain jacket crown has the advantage that less tooth tissue must be removed, but the material is brittle and lacks impact strength. Studies by McLean",2 have shown that these res...

OBJECTIVE The purpose of this study was to evaluate the effects of different polishing techniques on the surface roughness of dental porcelains. MATERIAL AND METHODS Fifty-five cylindirical specimens (15x2 mm) were prepared for each feldspathic (Vita VMK 95, Ceramco III) and low-fusing dental porcelain (Matchmaker). Fifty-five specimens of machinable feldspathic porcelain blocks (Vitablocs Ma...

This study investigated the interfacial microstructure between gold-coated titanium and low-fusing porcelain. The square surfaces of cast titanium split rods were sputter-coated with gold using a sputter coater at 40 mA for 1,000 seconds. Specimens were prepared for transmission electron microscopy (TEM) by cutting and polishing two pieces of the gold-coated split-rod specimens, which were glue...

PURPOSE The aim of this study was to evaluate the efficiency of manual polishing over autoglazed and overglazed porcelain and their effect on plaque accumulation. MATERIALS AND METHODS Thirty-six porcelain discs were fabricated out of which 18 each was subjected for autoglazing and overglazing. Half surface of the discs was left intact; the remaining half was roughened with medium grit diamon...

Aging of the population and the increase in patients on dialysis have led to an increasing frequency of “porcelain aorta” (subtotal circumferential calcification of the ascending aorta) in patients undergoing cardiac surgery.1) Porcelain aorta is reported to be associated with higher morbidity and mortality, especially related to stroke.2,3) Cardiac surgery is more complex in patients with porc...

This study was conducted to reveal antibacterial effect of silver nanoparticles incorporation on dental porcelain and its flexural strength surface hardness porcelain.