Amanda Freitas Valentim1, Renata Maria Moreira Moraes Furlan2, Tatiana Vargas de Castro Perilo3, Monalise Costa Batista Berbert4, Andréa Rodrigues Motta5, Estevam Barbosa de Las Casas6. 1. Prefeitura Municipal de Nova Lima, Nova Lima, MG, Brazil. 2. Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. 3. Instituto Metodista Izabela Hendrix, Belo Horizonte, MG, Brazil. 4. Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. 5. Department of Speech Language Pathology and Audiology, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. 6. Department of structural engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Abstract
PURPOSE: To describe the development and testing of a system that measures forces exerted by the tongue and upper lip on a tooth during rest and during swallowing. METHODS: Twenty-eight subjects, aged 19-31 years (mean: 23.2 years) were submitted to measurement of forces exerted by the upper lip and tongue on the maxillary right central incisor tooth. Flexiforce resistive sensors were fixed on the labial and lingual surfaces of the tooth. They were connected to an amplifier circuit and a data acquisition board for processing and transmitting information to a computer. RESULTS: At rest, the tongue force on the tooth was 0.00±0.00 N and the lip force on tooth was 0.02±0.02 N. The difference between them was significant. During swallowing, the values were 0.31±0.38 N and 0.15±0.14 N, for the tongue and lip, respectively. This difference was not significant. CONCLUSION: At rest, the lip exerts a larger force than the tongue on the maxillary right central incisor tooth. During swallowing, there was no difference between lip and tongue force on the tooth.
PURPOSE: To describe the development and testing of a system that measures forces exerted by the tongue and upper lip on a tooth during rest and during swallowing. METHODS: Twenty-eight subjects, aged 19-31 years (mean: 23.2 years) were submitted to measurement of forces exerted by the upper lip and tongue on the maxillary right central incisor tooth. Flexiforce resistive sensors were fixed on the labial and lingual surfaces of the tooth. They were connected to an amplifier circuit and a data acquisition board for processing and transmitting information to a computer. RESULTS: At rest, the tongue force on the tooth was 0.00±0.00 N and the lip force on tooth was 0.02±0.02 N. The difference between them was significant. During swallowing, the values were 0.31±0.38 N and 0.15±0.14 N, for the tongue and lip, respectively. This difference was not significant. CONCLUSION: At rest, the lip exerts a larger force than the tongue on the maxillary right central incisor tooth. During swallowing, there was no difference between lip and tongue force on the tooth.