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KMID : 0358920000270030410
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Journal of the Korean Academy of Pedodontics
2000 Volume.27 No. 3 p.410 ~ p.418
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Temperature changes in the pulp according to various restorative materials and bases during polishing procedure
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Baik Byeong-Ju
Lee Doo-Cheol
Kim Mi-Ra
Kim Jae-Gon
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Abstract
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An in vitro study was performed to evaluate the effect of four variables on the temperature rise produced by polishing of restorations. The foulr variables were : restorative material, base, thickness of remaining dentin, continuous polishing of’intermittent polishing. Class V cavities were cut on extracted molar and restored with composite resin , resin-modified glass ionomer cement. compomer, amalgam on the various bases (glass ionomer cement. zinc oxide eugenol cement, zinc phosphate cement) . Dentin thickness under the restoration was 0.5mm, 1.5mm. Polishing was done with an aluminum oxide-coated disc. Polishing time was continuous or intermittent fur up to 1 minute.
Intra-pulpal temperature increased almost linearly in all cases. Amalgam produced highest temperature risesat the pulp, while the composite resin, resin-modified glass ionomer cement and compomer were not different for each other The rate and extent of temperature rising of amalgam restoration was reduced by presence of acement base. Zinc oxide eugenol cement bases showed the highest temperature rise, while glass ionomer cement, zinc phosphate cement were not different to the untreased tooth. Thickness of remaining dentin was only significant for the amalgam restoration. Continuous polishing produced higher temperature rise than intermittent polishing.
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KEYWORD
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Temperature changes, Polishing, Composite resin, Amalgam
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