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  • Title: Adhesion in vitro of oral streptococci to porcelain, composite resin cement and human enamel.
    Author: Takatsuka T, Konishi N, Nakabo S, Hashimoto T, Torii Y, Yoshiyama M.
    Journal: Dent Mater J; 2000 Dec; 19(4):363-72. PubMed ID: 11816366.
    Abstract:
    We investigated the initial adhesion in vitro of oral streptococci to porcelain inlays. Four strains of streptococci, Streptococcus mitis NCTC12261, Streptococcus oralis ATCC9811, Streptococcus sanguis ATCC10556 and Streptococcus sobrinus OMZ176, were used in this study. The disc specimens were made of porcelain, composite resin cement and human enamel. These specimens, with or without a saliva-coat, were immersed in a suspension of each streptococci strain at 37 degrees C for 1 hr, and the numbers of cells adhering to specimens were counted after staining. The saliva-coat significantly decreased the numbers of adhering cells in all strains tested (t-test, p < 0.05). The adhesion to the porcelain and resin cements could be explained by a thermodynamic approach, although the adhesion to enamel could not be explained. These results indicated the possibility that the mechanism is different in initial adhered strains of streptococci between enamel and dental restorative materials.
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