Silva Garcez A, Núñez SC, Lage-Marques JL, Jorge AOC, Ribeiro MS. Efficiency of NaOCl and laser-assisted photosensitization on the reduction of Enterococcus faecalis in vitro.
ACTA ACUST UNITED AC 2006;
102:e93-8. [PMID:
16997103 DOI:
10.1016/j.tripleo.2006.02.015]
[Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2005] [Revised: 02/02/2006] [Accepted: 02/08/2006] [Indexed: 01/25/2023]
Abstract
OBJECTIVE
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.
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