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Crystalline anatase-rich titanium can reduce adherence of oral streptococci
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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2014 (English)In: Biofouling (Print), ISSN 0892-7014, E-ISSN 1029-2454, Vol. 30, no 6, 751-759 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 30, no 6, 751-759 p.
Keyword [en]
oral bacteria, salivary pellicle, early colonizers, microbial biofilm, dental implant abutment, titanium oxide
National Category
Microbiology Physical Sciences
URN: urn:nbn:se:uu:diva-229325DOI: 10.1080/08927014.2014.922962ISI: 000337965600010OAI: oai:DiVA.org:uu-229325DiVA: diva2:736293
Available from: 2014-08-06 Created: 2014-08-05 Last updated: 2014-08-06Bibliographically approved

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Sandell, Anders
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