The mechanical properties and the compatibility of Y-TZP with multiple veneering porcelains
Arrejaie, Aws Saleh
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Objectives: Evaluate the effect of various surface treatments on the mechanical properties of Y-TZP and compatibility with multiple conventional veneering porcelains. Materials and methods -LavaTM (3M/ESPE) was used as Y-TZP material. Four surface treatments were performed: as sintered, grinding, grinding followed by heat treatment, and sandblasting. - Five conventional veneering porcelains were used: VITA VM9 (Vita-Zahnfabrik), Noritake Cerabien ZR(Noritake), NobelRondoTM Zirconia (Nobel Biocare), LavaTM Ceram (3M/ESPE), Revised firing chart for LavaTM Ceram. 1. Fifty bars were fabricated from the veneering porcelains. Powder slurry mix was condensed and vibrated into a mold. Bars were then fired according to each manufacturer’s recommendation except for the revised LavaTM Ceram firing and then tested by Three-point bend test. 2. Forty LavaTM discs were randomly divided into four groups for various surface treatments and then tested for biaxial strength. 3. Two hundred LavaTM discs were randomly divided into 20 groups for various surface treatments, and then veneered with five different porcelain. Samples were then tested for shear bond strength. 4. Twenty LavaTM discs with thicknesses of 1 mm and 5 mm (10 per thickness) were veneered with VM⑱9 and then tested for shear bond strength. 5. Two hundred LavaTM samples were randomly divided into 20 groups for various surface treatments, and then were veneered with the five porcelains. Samples were subjected to a thermal shock test. Statistical analysis was conducted for all tests using ANOVA and Tukey post hoc test at p=0.05. [TRUNCATED]
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact email@example.com.Thesis (DScD) --Boston University, Henry M. Goldman School of Dental Medicine, 2010 (Department of Restorative Sciences and Biomaterials).Includes bibliographic references: leaves 121-126.
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