Residual stresses in porcelain-veneered zirconia prostheses
نویسندگان
چکیده
منابع مشابه
Thermal gradients and residual stresses in veneered Y-TZP frameworks.
OBJECTIVES The occurrence of "chipping" of all-ceramic restorations with Y-TZP frameworks has resulted in various designs and cooling procedures recommended for reducing such behavior. In this paper the temperature gradients during fast and slow cooling for conventional and anatomical designs are compared as well as an optical procedure to directly compare the influence of cooling rate on resid...
متن کاملFracture of porcelain-veneered gold-alloy and zirconia molar crowns using a modified test set-up
Objective: The main aim of this study was to compare fracture load and fracture mode of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) and metal-ceramic (MC) molar crowns using a modified test set-up to produce fractures similar to those seen in vivo, i.e. fractures of the veneering material rather than complete fractures. Materials and methods: 13 high-noble-alloy MC and 13 Y-TZP mo...
متن کاملEffects of core characters and veneering technique on biaxial flexural strength in porcelain fused to metal and porcelain veneered zirconia
PURPOSE The purpose of this study was to assess the impact of the core materials, thickness and fabrication methods of veneering porcelain on prosthesis fracture in the porcelain fused to metal and the porcelain veneered zirconia. MATERIALS AND METHODS Forty nickel-chrome alloy cores and 40 zirconia cores were made. Half of each core group was 0.5 mm-in thickness and the other half was 1.0 mm...
متن کاملInterface Residual Stresses in Dental Zirconia Using Laue Micro-diffraction
Due to their aesthetic value and high compressive strength, dentists have recently employed ceramics for restoration materials. Among the ceramic materials, zirconia provides high toughness and crack resistant characteristics. Residual stresses develop in processing due to factors including grain anisotropy and thermal coefficient mismatch. In the present study, polychromatic X-ray (Laue) micro...
متن کاملInfluence of peak oral temperatures on veneer–core interface stress state
Objective: There is a growing interest for the use of Y-TZP zirconia as core material in veneered all-ceramic prostheses. The objective of this study was to evaluate the influence of CET on the stress distribution of a porcelain layered to zirconia core single crowns by finite elements analysis. Material and methods: CET of eight different porcelains was considered during the analysis. Results:...
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ژورنال
عنوان ژورنال: Dental Materials
سال: 2012
ISSN: 0109-5641
DOI: 10.1016/j.dental.2012.04.019