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OBJECTIVES The purpose of this study was to evaluate the shear bond strength between various commercial zirconia core and veneering ceramics, and to investigate the effect of thermocycling. METHODS The Schmitz-Schulmeyer test method was used to evaluate the core-veneer shear bond strength (SBS) of three zirconia core ceramics (Cercon Base, Vita In-Ceram(More)
BACKGROUND For more than 20 years, researchers have been trying to automate conventional manual processes in dental technology with the hope of producing higher- and more uniform-quality materials, standardizing manufacturing processes and reducing production costs. METHODS The authors review existing computer-aided design (CAD)/computer-aided(More)
OBJECTIVE To evaluate the influence of the framework configuration on the marginal adaptation of four-unit anterior fixed partial denture (FPD) frameworks made of partially sintered zirconium dioxide (ZrO2) ceramics. MATERIAL AND METHODS Forty-eight standardized partially sintered ZrO2 ceramic four-unit FPD frameworks were fabricated using three different(More)
The strength and mode of failure of three different designs of custom-made all-ceramic implant abutments fabricated by milling of In-Ceram sintered ceramic blocks were compared with the conventional CeraOne system under static load. Four test groups were formed with different locations of abutment screws. In three test groups, In-Ceram crowns were(More)
STATEMENT OF PROBLEM Advances in computer-aided design/computer-assisted manufacturing (CAD/CAM) technology purportedly enhance the marginal fit of dental restorations. However, little information is available on the marginal accuracy of restorations manufactured with various CAD/CAM systems. PURPOSE The purpose of this study was to evaluate and compare(More)
In this study, we evaluate the accuracy and reproducibility of human tooth shade selection using a digital spectrophotometer. Variability among examiners and illumination conditions were tested for possible influence on measurement reproducibility. Fifteen intact anterior teeth of 15 subjects were evaluated for their shade using a digital spectrophotometer(More)
To compare the fracture resistance of zirconia 3-unit posterior fixed dental prostheses (FDPs) frameworks veneered with different veneering materials and techniques before and after artificial ageing. Forty-eight zirconia 3-unit FDPs, representing a missing first molar, were adhesively cemented on human teeth. The zirconia frameworks were randomly(More)
BACKGROUND Studies about the effect of grinding procedures as well as material thickness on the resistance of zirconia implant abutments are in short supply. PURPOSE This study evaluated the effect of wall thickness as well as preparation on the resistance of zirconia implant abutments. MATERIALS AND METHOD Sixty-four implants received titanium (group(More)
In implant dentistry today, precise preoperative planning of both the implant placement and the restoration is a critical prerequisite to succeeding in the oral rehabilitation of patients with dental implants. Modern three-dimensional imaging techniques such as digital volume tomography allow the acquisition of radiologic data with very low levels of(More)