Linha de pesquisa: Epidemiologia e controle das doen?as bucais. / ?rea de concentra??o: Odontopediatria. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-01-09T17:58:21Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) debora_souto_souza.pdf: 1070377 bytes, checksum: 562fbb6f4882bd48d44c79a12642d975 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-01-10T13:23:52Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) debora_souto_souza.pdf: 1070377 bytes, checksum: 562fbb6f4882bd48d44c79a12642d975 (MD5) / Made available in DSpace on 2017-01-10T13:23:52Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) debora_souto_souza.pdf: 1070377 bytes, checksum: 562fbb6f4882bd48d44c79a12642d975 (MD5) Previous issue date: 2016 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Objetivo: Avaliar a associa??o entre condi??es bucais, limiar de degluti??o e performance mastigat?ria de crian?as pr?-escolares. Metodologia: Um estudo transversal foi realizado com uma amostra composta por 127 crian?as entre tr?s e cinco anos de idade. O fluxo salivar, a presen?a de c?rie cavitada na regi?o posterior, o n?mero de dentes presentes e o n?mero de unidades oclusais foram as condi??es bucais avaliadas. Al?m disso, foram analisados o n?mero de ciclos mastigat?rios at? a degluti??o, o tamanho mediano da particular no limiar de degluti??o e na performance mastigat?ria. Essas avalia??es foram conduzidas utilizando um material teste (Optocal), que foi processado pela t?cnica de peneiragem e o tamanho mediano da part?cula (X50) foi avaliado pela equa??o de Rosin-Rammler. A an?lise dos dados foi realizada utilizando-se o programa Statistical Package for the Social Sciences (SPSS) para Windows, vers?o 22.0 e incluiu a descri??o de frequ?ncia das vari?veis, teste de correla??o de Spearman, an?lise de regress?o linear simples e m?ltipla. Resultados: Considerando o n?mero de ciclos como vari?vel dependente, somente o tamanho mediano das part?culas no limiar de degluti??o permaneceu associado a esta vari?vel (p<0,001). O tamanho mediano das part?culas na performance mastigat?ria (p<0,001) e o n?mero de ciclos (p<0,001) foram associados ao tamanho mediano das part?culas no limiar de degluti??o quando esta vari?vel foi considerada dependente. Utilizando o tamanho mediano das part?culas na performance mastigat?ria como vari?vel dependente, o n?mero de dentes (p<0,001) e o tamanho mediano das part?culas no limiar de degluti??o (p<0,001) foram as vari?veis que permaneceram associadas. Conclus?o: Um maior n?mero de ciclos mastigat?rios foi associado a um menor tamanho mediano da part?cula no limiar de degluti??o e o tamanho mediano da part?cula no limiar de degluti??o foi associado ? performance mastigat?ria e ao n?mero de ciclos mastigat?rios. Um arco dent?rio mais completo e um menor tamanho mediano da part?cula no limiar de degluti??o foram associados a uma melhor performance mastigat?ria. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Odontologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / Aim: Assess the association between oral conditions swallowing threshold and masticatory performance of preschool children. Methods: A cross-sectional study was performed with 127 children between three and five years old. The oral conditions evaluated were salivary flow, the presence of cavitated caries in posterior teeth, the number of teeth and the number of occlusal units. In addition, we analyzed the number of masticatory cycles to swallowing, particularly the median size in the threshold swallowing and masticatory performance. These evaluations were conducted using a test material (Optocal), which was processed by sieving technique and the median particle size (X50) was evaluated by the equation of Rosin-Rammler. Data analysis was performed using the Statistical Package for Social Sciences (SPSS) for Windows, version 22.0 and included a description of variables frequency, Spearman correlation test, analysis of simple and multiple linear regression. Results: Considering the number of cycles as the dependent variable, only the median particle size in the swallowing threshold remained associated with this variable (p <0.001). The median particle size in the masticatory performance ( p <0.001) and the number of cycles (p <0.001) were associated with median particle size in swallowing threshold when this variable was considered to be dependent. Using the median particle size of the masticatory performance as the dependent variable, the number of teeth (p <0.001) and the median particle size in swallowing threshold (p <0.001) were the variables that remained associated. Conclusion: A larger number of masticatory cycles was associated with a lower median particle size in the swallowing threshold, the median particle size in the swallowing threshold was associated with masticatory performance and the number of masticatory cycles. A fuller dental arch and a lower median particle size in the swallowing threshold were associated with a better masticatory performance.