KMID : 1035320140410040305
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Korean Society for Dental Materials 2014 Volume.41 No. 4 p.305 ~ p.310
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Influence of polishing methods on surface roughness and gloss of acrylic denture base resins
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Hwang Seong-Sig
Im Youn-Woon Kim Si-Chul Jun Soo-Kyung Lee Hae-Hyoung
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Abstract
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This study investigated the influence of polishing methods on the surface roughness and gloss of three acrylic denture base resins. Two polishing methods were applied to the resin specimens: high polishing by laboratory lathe with pumice and rouge (HP) and chairside polishing kit with three silicone points (SP). Specimen preparation and surface polishing procedures were conducted to manufacturer¡¯s recommendation. Surface roughness and gloss were measured by a contact type tester and a LED gloss checker with dual measurement mode (20¡Æ, 60¡Æ), respectively. Data were analyzed by one-way ANOVA and Scheffe¡¯s post hoc test. P<0.05 was considered as significant. Within the limitation of this study, following conclusions were drawn. For all acrylic resins, HP method produced a significantly lower surface roughness (Ra, Ry, Rz) than did SP method (P<0.05). SP procedure of specimens marked a higher surface roughness (Ra) over the threshold roughness minimizing plaque attachment, 0.2 ¥ìm. Surface gloss units of specimens at 60¡Æ were higher than 20¡Æ illumination, but 20¡Æ gloss produced materials difference than 60¡Æ gloss. A strong negative correlation between all gloss units (8¡Æ/20¡Æ/60¡Æ) and Ra, 60¡Æ gloss showed the highest correlation coefficient.
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KEYWORD
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Surface roughness, Gloss, Acrylic resin, Polishing method, Correlation
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