Purpose: to compare the behavior of perioral muscles in nasal, oral and oronasal respirators. Methods: a sample consisting of three distinct groups, equally subdivided into Nasal, Oral and Oronasal Respirators. The behavior of the orbicular muscle of the mouth (upper part) and mentual one was measured by surface electromyography at rest, swallowing and labial isometry. Results: in all situations investigated, the orbicular muscle of the mouth (upper part) and mental muscle showed no significant difference in relation to Root Means Square, that is, average electrical activity between Oral and Oronasal Respirators. The data showed a significant difference in In Nasal Respirators, as compared to the other groups. Conclusion: similarity was seen in the comparison of perioral muscles behavior between oral and oronasal respirators, however, a significant difference in relation to nasal respirators.

Purpose: to compare the variables of the Orofacial Evaluation with Scores Protocol between nasal, oral and oronasal breathers. Methods: a sample consisting of three distinct groups subdivided into nasal, oral and oronasal breathers, both genders, with ages ranging from 6 to 12 years. The characteristics of the orofacial musculature were measured using the protocol. Results: there was a significant difference between oral and oronasal breathers compared to nasal ones (p=0.0007) in specific variables such as palatal conformation (p=0.0073); mobility of tongue (p: 0.0111) and lip (p=0.0451), with a significant difference between the groups evaluated, also observed for the total protocol score (p=0.0007) and posture (p: 0.0073), where the nasal respirators differ from the oral and oronasal ones, the latter being similar. As for lip (p=0.0451) and tongue (p=0.0111) mobility, the groups studied presented different results among themselves. Conclusion: when comparing the groups of oral and oronasal breathers, in relation to the variables of the AMIOFE protocol, no statistically significant difference was seen between these two groups, which allows the conclusion that the orofacial myofunctional behavior between oral and oronasal breathers in this research, was similar.

A ata de defesa com as respectivas assinaturas dos membros da banca examinadora encontra-se no processo de vida acadêmica do aluno. Data: 02/08/2016 Dedico este estudo aos profissionais de Fonoaudiologia e áreas afins esperando contribuir e reafirmar conhecimentos de promoção e prevenção em saúde infantil. AGRADECIMENTOSA Deus em primeiro lugar.Aos meus pais, irmãos, marido e filhos pelas relações de amor. À Prefeitura Municipal de Campo Limpo Paulista, por viabilizar esta pesquisa, através de suas secretarias de Saúde, Educação e Promoção Social, disponibilizando o transporte dos pacientes até à Unicamp. Ao Secretário da Saúde do Município de Campo Limpo Paulista, Sr. João F. B. Buckvieser pela sua atitude receptiva quanto ao meu mestrado e por financiar a confecção dos folders sobre Orientações Fonoaudiológicas nos Respiradores Orais. Ao Diretor da Saúde do Município de Campo Limpo Paulista, Sr. Omacir Antônio Bresaneli, por assinar os ofícios para às Secretarias de Educação e Promoção Social, oficializando meu contato. À Profª Adriana Migliorini, Coordenadora da Educação Infantil, do município de Campo Limpo Paulista, pela parceria no meu Projeto sobre Hábitos Orais Deletérios em alunos de 4 a 6 anos de idade, participantes desta pesquisa.