This study aims to evaluate the impact of treatment with low power laser in the quality of life of patients with dentine hypersensitivity, herpes labialis, and paresthesia. Will be evaluated volunteers attended in the period January-December/2016 in the clinic of laser Special Laboratory in Dentistry, FO-USP. Volunteers who fit the prerequisites must sign the consent form and clear and will be submitted to OHIP-14 questionnaire before and after treatment with low power laser. Through the scores obtained in the questionnaire, we can assess whether there was an improvement in the quality of life of patients. In the group of patients with paresthesia, all the way from the compromised nerve is irradiated with low laser (808 nm), with a parameter 100 mw, 40 sec/point, 4 J in touch with 0.028 cm2 beam area. In the group of patients with herpes labialis in the phase of vesicles, the vesicles will be ruptured with sterile disposable needles in order to drain the liquid inside. After draining, with a sterile flexible shaft, the photosensitizer methylene blue (0.005%) is applied. The time the photosensitizer remains in contact with the tissue prior to low-power laser irradiation will be 5 minutes. It will be used red laser (660 nm) irradiation parameters of 40 MW 120 J / cm2, 4.8 J/point, 2 min/point. The number of points is determined by the size of the lesion. In the group of patients with dentine hypersensitivity, the affected teeth will be irradiated with low-level laser (808nm), with the power of 100 MW, 10 sec/point energy per point 1 J, radiating a cervical point and an apical point on anterior tooth and 2 points cervical and 2 points apical for posterior teeth. The beam diameter is 0.028 cm². In all cases, the number of clinical sessions will be determined by the clinical outcome of voluntary and will be recorded in the volunteer records. A comparative and descriptive statistical analysis will be performed.
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