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Lasers in Medical Science
Published in: Lasers in Medical Science 2/2006

01-07-2006 | Original Article

Influence of different power densities of LILT on cultured human fibroblast growth

A pilot study

Authors: Luciane Hiramatsu Azevedo, Fernanda de Paula Eduardo, Maria Stella Moreira, Carlos de Paula Eduardo, Márcia Martins Marques

Published in: Lasers in Medical Science | Issue 2/2006

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Abstract

The aim of this in vitro study was to analyze the influence of different power densities of low-intensity laser therapy (LILT) on the biomodulation of human gingival fibroblasts. The cells were cultured in nutritional deficit. Laser irradiation was carried out with a GaAlAs diode laser (λ-660 nm, 2 J/cm2). The irradiation was done twice with 12-h interval using the punctual technique, at continuous mode and in contact. The experimental groups were: I, control, nonirradiated; II, power of 10 mW and intensity≅142.85 mW/cm2; III, 29 mW and 428.57 mW/cm2. Growth curves were obtained by using the trypan blue dye exclusion assay. The cell growth of the irradiated groups was significantly higher than control group (P≤0.05). The cultures of Group II presented cell growth superior to that of Group III. Based on the conditions of this study, we concluded that the power density influences cell growth in an inversely proportional manner.
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Metadata
Title
Influence of different power densities of LILT on cultured human fibroblast growth
A pilot study
Authors
Luciane Hiramatsu Azevedo
Fernanda de Paula Eduardo
Maria Stella Moreira
Carlos de Paula Eduardo
Márcia Martins Marques
Publication date
01-07-2006
Publisher
Springer-Verlag
Published in
Lasers in Medical Science / Issue 2/2006
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-006-0379-9

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