Modified Y-TZP Core Design Improves All-ceramic Crown Reliability
نویسندگان
چکیده
منابع مشابه
Thermal shock resistance of core reinforced all-ceramic crown systems.
The coefficient of thermal expansion of core and veneer porcelains for all ceramic crowns must be compatible to prevent formation of stresses during the firing cycles. The purpose of this study was to use a thermal shock test to evaluate the crazing resistance of six all-ceramic crown systems. The systems tested were: Vita In-Ceram, Vita Hi-Ceram, Dicor veneered with Vitadur N, magnesia core ve...
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Bars of Y-TZP ceramic for dental restorations were subjected to hydrothermal degradation via in vitro exposure to water steam at 140°C for 7 days. X-ray diffraction, atomic force microscopy and scanning electron microscopy techniques were applied to observe and quantify the tetragonal-monoclinic (t-m) phase transformation associated with the process. Nanoindentation was used to assess the ceram...
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Objectives Many advantages have been attributed to dental zirconia ceramics in terms of mechanical and physical properties; however, the bonding ability of this material to dental structure and/or veneering ceramics has always been a matter of concern. On the other hand, hydroxyapatite (HA) shows excellent biocompatibility and good bonding ability to tooth structure, with mechanically unstable ...
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The dental practice is not only about prevention and treatment of oral diseases but also the fulfillment of demands of all who seek oral care, of which esthetics weighs more importance than any. To achieve excellence in the delivery of dental care, dentists rely on the vast array of modern advances in dental materials and restoration fabrication technologies. Need for more esthetical, metal-fre...
متن کاملFracture Resistance and Surface Treatment of Y-tzp Prepable Ceramic Abutments and Bars
NIMET DIAMOND ADATIA Fracture Resistance And Surface Treatment Of Y-TZP Prepable Ceramic Abutments and Bars. (Under the direction of Dr. Stephen Bayne) Intraoral preparation of zirconia implant abutments creates deep surface defects making abutments susceptible to fracture during loading. Fracture strengths were tested for (1) HIP-processed zirconia bars (Astra-Tech) after preparation and/or su...
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ژورنال
عنوان ژورنال: Journal of Dental Research
سال: 2010
ISSN: 0022-0345,1544-0591
DOI: 10.1177/0022034510384617