SciELO - Scientific Electronic Library Online

 
vol.22 número2Fatigue analysis in the masseters and temporalis muscles in patients with temporomandibular disorder during short period of masticationAntibiotic resistance of periodontal pathogens obtained from frequent antibiotic users índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Acta Odontológica Latinoamericana

versión On-line ISSN 1852-4834

Resumen

ARAUJO, Patrícia V et al. In vitro lethal photosensitization of S. mutans using methylene blue and toluidine blue o as photosensitizers. Acta odontol. latinoam. [online]. 2009, vol.22, n.2, pp.93-97. ISSN 1852-4834.

The purpose of this in vitro study was to evaluate the antimicrobial effect of photodynamic therapy on Streptococcus mutans (ATCC 25175) suspensions, using a red laser for one minute in combination with toluidine blue O (TBO) or methylene blue (MB). Both photosensitizers were used in three concentrations (25, 10 and 5 mg/L). The activity of photosensitizers and laser irradiation were tested separately on the bacteria, as well as the irradiation of this light source in the presence of the TBO or MB. These groups were compared to a control group, in which the microorganism did not receive any treatment. The activity of both TBO and MB or laser irradiation, alone, were not able to reduce the number of S.mutans. In the groups of lethal photosensitization, a bacterial reduction of 70% for TBO and 73% for MB was observed when these photosensitizers were used at 25 mg/L and a reduction of 48% was observed for MB at 5mg/L. In other concentrations there were no significant differences in comparison to the control group. Both the TBO and the MB at 25 mg/L associated with a red laser had an excellent potential for use in PDT in lethal sensitization of S. mutans.

Palabras clave : Photodynamic therapy; S. mutans; Lasers; Photosensitizer.

        · resumen en Portugués     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons