Avaliação do efeito analgésico da fotobiomodulação após a instalação de separadores elastoméricos. Ensaio clínico controlado randomizado

Abstract

Pain stemming from the placement of elastomeric separators and the exchanging of wires and accessories is the greatest reason for abandoning orthodontic treatment. Indeed, discomfort related to treatment exerts a negative impact on quality of life due to the difficulty chewing and biting. This paper proposes to evaluate the analgesic effects of photomiobodulation (PBM) on individuals undergoing orthodontic treatment. The sample was composed of individuals who receiving elastomeric separators on the mesial and distal face of the first molars. The patients were randomly allocated to two groups: an experimental group irradiated with low-level laser (LLL) and a sham group submitted to simulated laser irradiation. Upon the placement of the separators, the experimental group were receive a single application of LLL on the mesial and distal cervical portion and apical third of the molars. Perceived pain were analyzed after one hour using the visual analog scale in both groups. The patients were sign a statement of informed consent and assentment. Statistical analysis were performed with the Mann - Whitney, test exact Fisher and Qui-quadrado.The expectation was that the patients in the irradiated group have been a lower perception of pain compared to those in the sham group. The purpose of the study was to establish an effective method for PBM with the use of low level infrared laser (Ga-Al-As with a wavelength of 808 nm and output power of 100 mW) for reductions in pain related to orthodontic treatment.