Effects of acid hydrolysis and mechanical polishing on surface residual stresses of low-fusing dental ceramics
Date
2001
DOI
Authors
Alkhiary, Yaser Mohammad
Version
OA Version
Citation
Abstract
The purpose of this study was to evaluate by means of indentation technique the effects of acid hydrolysis and mechanical polishing on the surface residual stresses of
two low-fusing ceramic materials: Duceram-LFC (Dentin and Enamel) and Finesse (Dentin and Enamel) porcelains. Sixteen sample bars (25.O mm x 3.5 mm x 2.5 mm) were fabricated for each material, and assigned to 4 surface-treatment groups (4 bars for each group): control, hydrolysis, glazed then polished, and polished then glazed. Surface residual stresses were determined by conventional micro indentation crack technique. A Buehler Vickers indenter contacted the Duceram samples with a 500-gram load for 10 seconds, and the Finesse samples with a 300-gram load for the same time period. A scanning electron microscope (SEM) was used to study surface texture before and after hydrolysis and polishing. Mean crack length values created from the Vickers indenter are shown in (Table l and Table 2). [TRUNCATED]
Description
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Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Dental Medicine, 2001 (Prosthodontics).
Includes bibliographical references (leaves 63-65).
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Dental Medicine, 2001 (Prosthodontics).
Includes bibliographical references (leaves 63-65).
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.