1887

Abstract

The use of dental implants to treat tooth loss has increased rapidly over recent years. ‘Smooth’ implants showing high long-term success rates have successively been replaced by implants with rougher surfaces, designed to stimulate rapid osseointegration and promote tissue healing. If exposed in the oral cavity, rougher surfaces may promote bacterial adhesion leading to formation of microbial biofilms which can induce peri-implant inflammation. is an early colonizer of oral surfaces and has been recovered from titanium surfaces . The purpose of this study was to examine the adherence of clinical strains of to titanium with smooth or moderately rough surface topography and to determine the effect of a saliva- or serum-derived coating on this process. Adherence was studied using a flow-cell system with confocal laser scanning microscopy, while putative adhesins were analysed using proteomics of bacterial cell wall proteins. This showed that adherence to moderately rough surfaces was greater than to smooth surfaces. Serum did not promote binding of any of the studied strains to titanium, whereas a saliva coating increased adherence in two of three strains tested. The higher level of adherence to the moderately rough surfaces was maintained even in the presence of a saliva coating. The strains that bound to saliva expressed an LPXTG-linked protein which was not present in the non-adherent strain. Thus strains of differ in their capacity to bind to saliva-coated titanium and we propose that this is due to differential expression of a novel adhesin.

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2012-02-01
2024-04-19
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