Efeito da laserterapia em baixa intensidade (LLLT) com luz infravermelha no reparo ósseo de áreas enxertadas com osso bovino desproteinizado

Abstract

The aim of this study was to evaluate the effect of 4 sessions of low intensity laser therapy (LLLT) with infrared light on the bone repair of areas grafted with deproteinized bovine bone in rat mandibles. The 24 animals were randomly selected and divided into 2 groups with 12 animals each, which were evaluated in two experimental periods (30 and 90 days), with 6 animals in each group and experimental period. The groups were divided according to the application or not of the LLLT in the grafted areas: CTR: Non-irradiated grafted area; IRL: Grafted area irradiated with infrared laser in 4 sessions. A dome-shaped teflon capsule was bilaterally installed in the mandible branch of each animal, which was filled with deproteinized bovine bone. The dome shaped teflon capsule was fixed to the mandible by means of sutures with 4.0 silk thread that passed through the capsule itself and the perforations performed in the bone tissue. The evaluation of the volume of mineralized tissue in the grafted area was carried out by means of microtomographic analysis. A greater volume of mineralized tissues was noted in areas treated with LLLT in relation to the grafted areas that were not irradiated. It can be concluded that the application of LLLT with infrared light in 4 sessions promoted a greater volume of mineralized tissues in areas grafted with deproteinized bovine bone.