Histological evaluation of the effects of LLLT on the epithelial, connective and osseous tissue healing: experimental study in rats

Wound healing is a physiological process of live tissues. Researcheshave been made in order to improve this process and establish a fastpatient rehabilitation. The aim of this study was to evaluate thehistological effects of LLLT AsGaAl (λ λ λ λ λ = 660nm, 780nm; W = 10mW;= 7,5; 15J/cm2; t = 5 min) on the epithelial, connective and bone tissue healing, on an alveolar model. Rats were submitted to thesurgical creation of an alveolus between the lower incisor and the first mandibular molar, on both sides. After LLLT application, they were sacrificed on 3, 7, 14, 21, and 28 days. The results showed epithelial and connective tissues with accelerated growth during LLLTapplication; osseous tissue with accelerated neoformation, howeverfollowing normal patterns. Thus, epithelial and connective tissuesresponded to LLLT by means of steady cellular renewal; osseous tissueshowed accelerated healing, similar to the normal growth patterns.