Fotobiomodulação com led e laser no reparo de alvéolo mandibular de coelhos (Oryctolagus cuniculus)

Abstract

The aim of this study was to evaluate the effects of LED and LASER low intensity in reparation of alveoli of rabbits. We used 18 white rabbits, male, young adult, New Zeland, body mass between 2.3 and 2,5 kg. These were divided into tree groups of six and everyone was made extraction of the first premolar lower right. Group I received irradiation LED, infrared (830 nm), 30 J / cm ², 26 mW for 150 seconds and the group II irradiation LASER, infrared (780 nm), 30 J / cm ², 24 mW for 50 seconds in 09 sessions of 48 in 48 hours and group III received no irradiation (control group). The applications were perpendicular to the alveoli and started 48 hours after surgery. The three groups were evaluated clinically for eighteen days postoperatively. At 90 days, the rabbits were euthanized and the fragments mandible were harvested and subjected to computed tomography for evaluation of bone density in Hounsfield units. Soon after, were cut and stained with hematoxylin and eosin for histological and histomorphometric to determination of the type of collagen. The results of clinical, tomographic, histologic, histomorphometric and collagen suggest beneficial effects of photobiomodulations LED and LASER on bone reparation of dental alveoli of rabbits, when compared to the normal repair. There was statistical difference between the groups LED and control, but not between the treated groups. From the results obtained it was concluded that the photobiomodulations LED and LASER promote bone repair in rabbits.