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Title: Thermal treatments modulate bacterial adhesion to dental enamel
Authors: Hu, X.L.
Ho, B.
Lim, C.T. 
Hsu, C.S. 
Keywords: bacteria
bacterial adhesion
dental caries susceptibility
non-ablative laser treatment
Issue Date: Dec-2011
Citation: Hu, X.L., Ho, B., Lim, C.T., Hsu, C.S. (2011-12). Thermal treatments modulate bacterial adhesion to dental enamel. Journal of Dental Research 90 (12) : 1451-1456. ScholarBank@NUS Repository.
Abstract: Numerous studies have demonstrated the effects of laser-induced heat on demineralization of enamel; however, no studies have investigated the link between heat/laser-induced changes in physicochemical properties and bacterial adhesion. In this study, we investigated the effects of thermal treatment on surface properties of enamel such as hydrophobicity and zeta potential. Bacterial adhesion to treated surfaces was characterized by confocal laser scanning microscopy, and adhesion force was quantified by atomic force microscopy. The hydrophobicity of enamel increased after heating (p < 0.05), and the zeta potential of heated enamel became more negative than that of the control (p < 0.01). Streptococcus oralis and S. mitis were more hydrophilic than S. sanguis, with more negative zeta potential (all p < 0.01). S. mitis and S. oralis occupied significantly less area on enamel after being heated (p < 0.05). Heating reduced the adhesion force of both S. mitis and S. oralis to enamel with or without saliva coating. Reduction of adhesion force was statistically significant for S. mitis (p < 0.01), whereas that of S. oralis was not statistically significant (p > 0.05). Heating did not affect the adhesion of S. sanguis with or without saliva coating. In conclusion, thermal treatment and photothermal/laser treatments may modulate the physicochemical properties of enamel, preventing the adhesion of some bacterial species. © 2011 International & American Associations for Dental Research.
Source Title: Journal of Dental Research
ISSN: 00220345
DOI: 10.1177/0022034511424155
Appears in Collections:Staff Publications

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