Effect of the polishing technique at low or high speed on the micro-hardness of dental amalgam

Dental cavities were prepared and restored with amalgam, using three different silver alloys. The surface of the restorations was finished 24 hours after condensation, with a rotatory instrument using a low- or high-speed handpiece. The specimens were then submitted to metallographic polishing and o...

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Bibliographic Details
Published inBrazilian dental journal Vol. 2; no. 1; pp. 51 - 57
Main Authors Pedigoni, M de L, Centola, A L, Froner, I C, Turbino, M L, Ribeiro, S A
Format Journal Article
LanguageEnglish
Published Brazil 1991
Subjects
Dental Amalgam
Dental High-Speed Technique
Dental Polishing - methods
Dentistry
Hardness
Hardness Tests
Humans
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Summary:Dental cavities were prepared and restored with amalgam, using three different silver alloys. The surface of the restorations was finished 24 hours after condensation, with a rotatory instrument using a low- or high-speed handpiece. The specimens were then submitted to metallographic polishing and one of the margins of the amalgam restoration were then submitted to Vickers' micro-hardness test. Another micro-hardness test was accomplished 168 hours after condensation and the two sets of micro-hardness values were compared. No significant statistical differences were detected between the micro-hardness values obtained with low or high speed in the polishing technique.
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ISSN:0103-6440