Streptococcus mutans photoinactivation using a combination of a high potency photopolymerizer and rose bengal.

Abstract:

BACKGROUND:Long treatment periods to reach a substantial inactivation of microorganisms are one of the critical challenges in the photodynamic therapy field. METHODS:Planktonic suspensions of Streptococcus mutans were treated in different groups: presence of rose bengal (RB at 2μM) and light exposure by a new high potency photopolymerizer (L at wavelength=440-480nm; dosimetry=96J/cm(2) - 40s of irradiation; potency density=1200mW/cm(2); dosage=48J) - RB+L+ (PDT), just with dye - RB+L-, just with light - RB-L+ and absence of light and dye RB-L- (control group). Aliquots of each group were transferred to Petri dishes to colony counting (CFU/mL) with the data transformed in log10. The results were submitted to ANOVA and Tukey test at 5%. RESULTS:PDT group presented total eradication of microorganisms showing statistical difference with all the other groups (5.82log reduction≅99%). CONCLUSION:The high potency photopolymerizer in pulsed emission at an extra short irradiation and low concentration of rose bengal could be considered as a progressive alternative to the control of S. mutans suspensions.

authors

Leite HL,Cavalcante SI,de Sousa EM,Gonçalves LM,Paschoal MA

doi

10.1016/j.pdpdt.2016.05.001

subject

Has Abstract

pub_date

2016-09-01 00:00:00

pages

11-2

eissn

1572-1000

issn

1873-1597

pii

S1572-1000(16)30047-3

journal_volume

15

pub_type

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