Effects of various finishing methods on staining and accumulation of Streptococcus mutans HS-6 on composite resins

• Published in: Dental materials 1985-12, Vol.1 (6), p.225-227
• Main Authors: Shintani, H., Satou, J., Satou, N., Hayashihara, H., Inoue, T.
• Format: Article
• Language: English
• Subjects: Adhesiveness; composite resin; Composite Resins; Dental Polishing; Dentistry; S. mutans; staining; Staining and Labeling; Streptococcus mutans - isolation & purification; Streptococcus mutans - physiology; Surface Properties
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/S0109-5641(85)80046-4

Microfilled and conventional composite resins, polished by different methods were tested for their staining and for bacterial accumulation in vitro. All 4 composite resins showed their characteristic staining tendencies for either Tobacco or Oil orange depending on their physicochemical properties and surface roughness. The effect of these factors seemed to depend on the substance adsorbed and the nature of the resins. Thus, in Tobacco solution immersion test, white point-polished surface showed the highest value of staining, which was followed by smooth surface and finished surface in this order, except one (Clearfil), in which the order was reversed. In the Oil orange solution immersion test, staining tendencies showed little correlation with surface roughness, but the hydrophobicity of the resin seemed to be an important factor. Polished surface accumulated more bacteria than smooth surface in the in vitro test of bacterial accumulation. However, no appreciable difference was observed among these 4 resins having an equal roughness.