Comparison of bacterial disinfection efficacy using blue and red lights on dental implants contaminated with Aggregatibacter actinomycetemcomitans

Abstract

ObjectivesThe purpose of this study was to determine the bacterial disinfection efficacy of four photosensitizers (PSs; curcumin, riboflavin, toluidine blue O, and phycocyanin) with blue diode laser (Blue DL) and blue light-emitting diode (Blue LED) or Red DL and Red LED in dental implants contaminated with Aggregatibacter actinomycetemcomitans. Materials and methodsA total of 60 dental implants were contaminated with A. actinomycetemcomitans. All implants were then randomized into ten different disinfection modalities (n = 6 implants per group). The irradiation wavelength in Blue DL and Blue LED or Red DL and Red LED was 450, 430–460, 635, and 630 nm, respectively and its applied energy density was 60 J/cm2 in all groups. Group IX was served as the control group and in group X disinfection was performed with 0.2% chlorhexidine. After the treatments, the colony forming units (CFUs)/ml were calculated to determine antimicrobial effects of each treatment. ResultsAll disinfection methods significantly reduced bacteria amounts of dental implants inoculated with A. actinomycetemcomitans compared to control group. The CFU/ml in LED group was significantly lower than the DL in all studied groups. ConclusionaPDT could be an effective supplement in dental implants disinfection. The LED, proved to be better in reducing CFU/ml of A. actinomycetemcomitans on dental implants surface than DL.