Crystalline anatase-rich titanium can reduce adherence of oral streptococci |
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Authors: | Marjan Dorkhan Jan Hall Per Uvdal Anders Sandell Gunnel Svensäter |
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Institution: | 1. Department of Oral Biology, Faculty of Odontology, Malm? University, SE-205 06, Malm?, Sweden;2. Nobel Biocare AB, Box 5190, SE-412 02, Gothenburg, Sweden;3. Chemical Physics, Department of Chemistry, Lund University, PO Box 124, SE-22 100, Lund, Sweden;4. MAX-IV laboratory, PO Box 118, SE-221 00, Lund, Sweden;5. Department of Physics and Astronomy, Uppsala University, PO Box 516, SE-75 120, Uppsala, Sweden |
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Abstract: | Dental implant abutments that emerge through the mucosa are rapidly covered with a salivary protein pellicle to which bacteria bind, initiating biofilm formation. In this study, adherence of early colonizing streptococci, Streptococcus gordonii, Streptococcus oralis, Streptococcus mitis and Streptococcus sanguinis to two saliva-coated anodically oxidized surfaces was compared with that on commercially pure titanium (CpTi). Near edge X-ray absorption (NEXAFS) showed crystalline anatase was more pronounced on the anodically oxidized surfaces than on the CpTi. As revealed by fluorescence microscopy, a four-species mixture, as well as individual bacterial species, exhibited lower adherence after 2?h to the saliva-coated, anatase-rich surfaces than to CpTi. Since wettability did not differ between the saliva-coated surfaces, differences in the concentration and/or configuration of salivary proteins on the anatase-rich surfaces may explain the reduced bacterial binding effect. Anatase-rich surfaces could thus contribute to reduced overall biofilm formation on dental implant abutments through diminished adherence of early colonizers. |
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Keywords: | oral bacteria salivary pellicle early colonizers microbial biofilm dental implant abutment titanium oxide |
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