GARCEZ, AGUINALDO S.NUNEZ, SILVIA C.LAGE MARQUES, JOSE L.JORGE, ANTONIO O.C.RIBEIRO, MARTHA S.2014-07-152014-07-302014-07-152014-07-302006GARCEZ, AGUINALDO S.; NUNEZ, SILVIA C.; LAGE MARQUES, JOSE L.; JORGE, ANTONIO O.C.; RIBEIRO, MARTHA S. Efficiency of NaOCl and laser-assisted photosensitization on the reduction of Enterococcus faecalis in vitro. <b>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics</b>, v. 102, p. e93-e98, 2006. DOI: <a href="https://dx.doi.org/10.1016/j.tripleo.2006.02.015">10.1016/j.tripleo.2006.02.015</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/5346.1079-2104http://repositorio.ipen.br/handle/123456789/5346Objective: To investigate the action of a red laser associated with a photosensitizer on the reduction of Enterococcus faecalis in dental root canal in vitro. Study design: Thirty prepared teeth with single canals were contaminated. The chemical group was irrigated with 0.5% NaOCl and left flooded for 30 minutes. In the laser group, a paste-based photosensitizer was maintained in the root canals for 5 minutes, and then irradiated with a laser at 685 nm using an optical fiber for an E of 1.8 J during 3 minutes. After treatment, the canal content was collected, serially diluted, and cultured to determine the number of colony-forming units. Results: Photosensitizer alone or laser alone did not have any bactericidal effect. Chemical solution reduced viable bacteria in 93.25%. Laser photosensitization resulted in a reduction of 99.2%, a significantly higher bacterial reduction than NaOCl. Conclusion: Laser photosensitization was effective for reducing E. faecalis in root canals and could be an adjunct to endodontic treatment.e93-e98openAccessteethoral cavityinfrared spectralaser radiationmicroorganismsbacteriasodiumphotodynamic therapyphotosensitivityArtigo de periódico10210.1016/j.tripleo.2006.02.015https://orcid.org/0000-0002-4203-1134