A UTILIZAÇÃO DO LASER DE BAIXA INTENSIDADE NA MOVIMENTAÇÃO DENTÁRIA E NA SENSIBILIDADE DOLOROSA APÓS APLICAÇÃO DE FORÇA ORTODÔNTICA

• Autor(a) principal: Lages, Luís Henrique Rodrigues
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da METODISTA
• Texto Completo: http://tede.metodista.br/jspui/handle/tede/1288
• topic: Terapia a Laser de Baixa Intensidade; Movimentação Dentária; Ortodontia Corretiva; Laser Therapy, Low-Level; Tooth Movement; Orthodontics, Corrective; CNPQ::CIENCIAS DA SAUDE

The purpose of this study was to evaluate the effectiveness of low level laser therapy (LLLT) on tooth movement acceleration and pain reduction during the application of orthodontic force. The sample consisted of 19 patients, twelve females and seven males, with initial mean age of 14.69 years, all with treatment planning envolving extraction of first premolars. From these, 66 canines underwent to initial retraction, therefore, 33 received laser application during this treatment phase and 33 were selected as control. It was used low-intensity laser gallium-aluminum- arsenide, with wavelength of 780nm (40mW; 10J/cm2; 10s/point applied only once a month on ten points, five at buccal side and five at palatal side). Casts were made during all phases of retraction of the canines, which had a mean duration of four months and then, this casts were scanned to measure the amount of movement of irradiated side in comparison with the control side, using as reference the incisive papilla. To avaliate the pain experienced by patients, they were asked to complete a visual analogue scale (VAS) from "0" to "10", where zero means no pain and ten means insupportable pain, in intervals of 12, 24, 48 and 72 hours after application of orthodontic force. Crowding was measured for all hemiarc of patients at onset of treatment, by the sum of the distance between the contact points of teeth. For verification of the normality, it was used the Kolmogorov-Smirnov test. To compare irradiated with control sides, it was used paired t test, except for the variable "canines / molars rate," that was compared by nonparametric Wilcoxon test (p <0.05). The results showed that crowding in irradiated and control sides were compatible. Furthermore, no statistically significant difference was observed between the amount of retraction of the irradiated canines in comparison to non-irradiated, such as the pain experienced by patients. It was concluded that the LBI in dosimetry and manner that was used in this present study was not efficient in accelerating tooth movement or reducing pain experienced by patients in response to orthodontic forces.