1 Centro de LASER e Aplicações, IPEN-CNEN/SP, São Paulo, Brasil. Daiane Thais Meneguzzo, MSc1,2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                2 Faculdade de Odontologia São Leopoldo Mandic, Campinas - SP,Brasil. Fernanda Cunha, PhD2 Luiz Alexandre Thomaz, DDS2 Paulo de Camargo Moraes, MSc23 Departamento de Dentística, Faculdade de Odontologia da USP - SP, Brasil. Leila Soares Ferreira, DDS3 Resumo                                                                                                                                                                                                                                                                                                           O objetivo deste trabalho é relatar três casos de paralisia facial periférica (PFP) tratados com LASER em baixa intensidade (LBI). Caso 1: Paciente M.G., feminina, 58 anos, com PFP há 38 anos, após remoção de tumor no ouvido. Caso 2: S.D.F., 63 anos, masculino, com PFP há 19 anos por acidente com arma de fogo. Caso 3:V.L., feminina, 47 anos, com PFP direita há 2 anos, após choque térmico, e PFP esquerda há 2 meses, iniciada após elevação abrupta da pressão arterial. O protocolo de irradiação utilizado foi de 2 a 6 joules de energia, 100 mW de potência e comprimento de onda de 660 nn e 810 nm, alternadamente. O número de sessões variou de 8a 30 e foram realizadas semanalmente. Todos os pacientes apresentaram melhora significante no fechamento e abertura de pálpebra, relaxamento muscular, expressão facial, mastigação e fala. O LBI demonstrou ser benéfico no tratamento da paralisia facial nos três casos relatados, no entanto, se a lesão é tratada precocemente melhor será o resultado observado.                                                                                                                                                                                                                                                                                                                                                                                                     Descritores: Lesão nervosa, regeneração nervosa, paralisia facialperiférica, LASER em baixa intensidade (LBI)                                                                                                                                                                                                                                                                                                                 Abstract The aim of this case report is to describe three cases of peripheralfacial paralysis (PFP) treated by low level LASER therapy(LLLT). Case 1: Patient M.G., female, 58 years old, with PFP from38 years ago, by a tumor removal surgery. Case 2: S.D.F., male, 63years old, with PFP from 19 years ago after a firearm accident.Case 3: V.L, female, with bilateral PFP on the right side from 2 yearsago subsequent to abrupt temperature variation and on the left sidefrom 2 months ago following abrupt increase on blood pressure.The irradiation protocol used was 2 to 6 joules of energy, 100 mWof power, 660 nm and 810 nm alternating wavelengths. The numberof sessions varied from 8 to 30 weekly. All the patients showedimportant progression on open and closing eyes, facial musclesloosen up, improved facial expression, masticator function andspeech. LLLT showed to be beneficial on facial paralysis treatmentin all presented case reports, whatever, early intervention leads tobetter results.                                                                                                                                                                                                                                                                                                                                                                                                                                  Descriptors: nerve injury, nerve regeneration, peripheral facialparalysis, low level LASER therapy (LLLT)                                                                                                                                                                                                                                                                                                                                                                                                                                                             Contato: E-mail: dai@usp.br

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