Abrasion of Human Enamel by Different Dental Ceramics in vitro

Manufacturers generally quote indentation hardness values when predicting the clinical wear potential of newly introduced ceramic restoratives. The objective of this study was to determine whether in vitro two-body wear correlated well with hardness. A modified polisher was used to abrade enamel cyl...

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Bibliographic Details
Published inJournal of dental research Vol. 70; no. 3; pp. 221 - 225
Main Authors Seghi, R.R., Rosenstiel, S.F., Bauer, P.
Format Journal Article
LanguageEnglish
Published Los Angeles, CA SAGE Publications 01.03.1991
Subjects
Ceramics - adverse effects
Dental Enamel - chemistry
Dental Porcelain - adverse effects
Dental Restoration, Permanent - adverse effects
Hardness
Hardness Tests
Humans
Materials Testing
Surface Properties
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Summary:Manufacturers generally quote indentation hardness values when predicting the clinical wear potential of newly introduced ceramic restoratives. The objective of this study was to determine whether in vitro two-body wear correlated well with hardness. A modified polisher was used to abrade enamel cylinders against polished disks of commercially available dental porcelains and glass. Enamel loss after four h was measured with a micrometer. Five ceramic materials were tested, and enamel abrasion rates were correlated with Knoop hardness values. Dicor and Dicor coated with a shading porcelain were found to cause the lowest wear of enamel. These rates were statistically significantly lower than those obtained with Optec, the most abrasive material. These findings may be due to microstructural differences between the materials. Knoop hardness showed poor correlation with the results of the abrasive testing.
ISSN:0022-0345
1544-0591
DOI:10.1177/00220345910700031301