Revista de Odontologia da UNESP
https://revodontolunesp.com.br/journal/rou/article/doi/10.1590/1807-2577.1061
Revista de Odontologia da UNESP
Original Article

Avaliação da microdureza do esmalte de dentes decíduos de crianças com paralisia cerebral

Enamel microhardness of primary teeth of cerebral palsy children

Hernández de Campos, Priscila; Andrade, Ruth Sarai Ledesma; Rojas, Paulina López; Ferreira, Maria Cristina D.; Santos, Maria Teresa B. T.; Guaré, Renata de Oliveira; Diniz, Michele Baffi

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Resumo

Introdução: Em indivíduos com paralisia cerebral, ocorre redução do fluxo salivar, o que pode predispor à hipomineralização do esmalte e à cárie dentária. Objetivo: Comparar a microdureza do esmalte de dentes decíduos anteriores e posteriores de crianças com paralisia cerebral (PC) e crianças normorreativas (NR). Material e método: Foram utilizados 58 dentes decíduos esfoliados/extraídos, que foram distribuídos em quatro grupos: (A) anteriores de PC (n=14); (B) anteriores de NR (n=16); (C) posteriores de PC (n=14), e (D) posteriores de NR (n=14). Os dentes foram seccionados, incluídos em resina acrílica, lixados e polidos. A análise da microdureza longitudinal foi realizada em microdurômetro com endentador do tipo Knoop, com carga estática de 25 g/f e tempo de 5 segundos. Foram realizadas três fileiras de 12 endentações, distanciadas entre si em 100 mm, com profundidade entre 10 e 180 mm. Foram obtidas as médias de cada profundidade para cada dente e, posteriormente, as médias de cada profundidade para cada grupo avaliado. O teste estatístico empregado foi o de Mann-Whitney (α=5%). Resultado: As médias de microdureza foram 253,5 ± 55,3 (A), 247,6 ± 45,7 (B), 284,4 ± 68,7 (C) e 252,2 ± 53,8 (D). Não houve diferença estatisticamente significante entre os grupos A e B e os grupos C e D, para cada profundidade e para a média global (p>0,05). Conclusão: Pôde-se concluir que a microdureza de esmalte de dentes decíduos anteriores e posteriores de crianças com PC foi semelhante à microdureza de esmalte de dentes decíduos de crianças normorreativas.

Palavras-chave

Esmalte dentário, dente decíduo, testes de dureza, paralisia cerebral.

Abstract

Introduction: Cerebral palsy subjects present reduced salivary flow, which may predispose to enamel hypomineralization and dental caries. Aim: To compare the enamel microhardness of anterior and posterior primary teeth of normorreactive children (NR) and children with cerebral palsy (CP). Material and method: The sample was consisted of 58 exfoliated/extracted primary teeth distributed into 4 groups: (A) anterior teeth of CP (n= 14), (B) anterior teeth of NR (n=16),(C) posterior teeth of CP (n=14) and (D) posterior teeth of NR (n=14). The teeth were hemisectioned, embedded in acrylic resin, grounded and polished. The longitudinal microhardness analysis was carried out in a microdurometer with a Knoop indenter with a 25-gram load for 5 seconds. Three rows of 12 indentations were made from the outer surface from 10 to 180 mm. The rows were spaced 100 mm from each other. The values of the three measurements at each distance were averaged for each tooth and, afterwards, for each group. The non-parametric statistical test used was the Mann-Whitney U (α=5%). Result: The microhardness means data were 253.5 ± 55.3 (A), 247.6 ± 45.7 (B), 284.4 ± 68.7 (C) and 252.2 ± 53.8 (D).There was no significant difference between the groups A and B, as well as groups C and D for each distance and global average (p>0.05). Conclusion: It can be concluded that the enamel microhardness of anterior and posterior primary teeth of cerebral palsy children was similar to the normorreactive children.

Keywords

Dental enamel, deciduous tooth, hardness test, cerebral palsy.

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