STATEMENT OF PROBLEM Production of a ceramic dental restoration that matches a target shade is dependent on porcelain thickness. Even when adequate porcelain thickness exists, clinical shade matches are difficult to achieve. PURPOSE This study predicted the thickness of dentin porcelain required to obtain a clinical shade match (</=3 DeltaE units) for a variety of dental porcelain systems and...

A leucite-reinforced glass ceramic material (IPS-Empress) was developed for clinical use in Zurich. A prospective clinical study of these laboratory-made all-ceramic crowns revealed encouraging result with an estimated 2-year survival rate of 95%. The aim of the present study was to determine the clinical behavior during a longer period of observation with respect to a possible fatigue fracture...

Color match is one of the most important characteristics of aesthetic restorative materials. Maintenance of color throughout the functional lifetime of restorations is important for the durability of treatment. This characteristic is not constant among dental materials. The purpose of this research was to assess the color stability of five aesthetic restorative materials when immersed in a coff...

With the appearance of all-ceramic systems, providing a choice of framework porcelains and allowing the same material to be used for the veneer, it is now possible to select the ideal structure in terms of both function and aesthetics. Silicate ceramics allow porcelain laminate veneers and crowns to be used in the anterior region, providing excellent aesthetics; while for the posterior area, wh...

This study evaluated the effects of distinct surface treatments on the micro-tensile bonding strength (microTBS) of different ceramic materials. The occlusal surfaces of eighteen human maxillary molars were flattened perpendicularly to the long axis and divided in groups based on surface treatment (sandblasting: s; hydrofluoric acid: a; tribochemical silica coating: t): DP-s, DP-a, DP-t, IE-s, ...

Endodontic diagnosis often requires thermal testing through porcelain fused-to-metal (PFM) and all-ceramic restorations. The purpose of this study was to measure and compare the temperature change during thermal testing by three commonly used methods occurring at the pulp-dentin junction (PDJ) of nonrestored teeth and teeth restored with full coverage restorations made of PFM, all-porcelain, or...

The aim of the current study was to evaluate the influence of polycarboxylate temporary cement remaining on the dentin surface on the bond strength of a composite luting system. An acrylic resin plate was luted to bovine dentin with a polycarboxylate temporary cement (HY-Bond Temporary Cement Hard, HYB). The temporary cement was not used for the control groups. After removing the temporary ceme...

In 1769 the Edinburgh-trained physician, Dr William Buchan, produced the first edition of his Domestic medicine, which was to be a best-seller over the next thirty years. Edition after edition followed, nineteen in all in Britain, each of 5000 to 7000 copies.2 Pirated in America, translated into every language in Europe, recognized by the Empress of Russia, Domestic medicine made Buchan's name ...

Background: The quest for newer and stronger materials replacing teeth has resulted in Zirconium oxide's introduction, which possesses excellent mechanical strength toughness. However, uncertainty exists the relationship between its bond surface treatment method adopted mode of failure at interface. Aim - study aimed to evaluate comparison micro-tensile zirconia core all-ceramic layering with d...