Estudo da rugosidade e ultra-estrutura superficial do esmalte dental humano submetido a diferentes métodos profiláticos
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Data
2007-03-21
Autores
Castanho, Gisela Muassab [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como propósito estudar a rugosidade e ultra-estrutura superficial in vitro do esmalte dental humano submetido a três métodos profiláticos. Selecionaram-se 69 molares humanos com faces vestibulares hígidas e divididos em três grupos. No primeiro grupo, utilizou-se uma mistura de pedra-pomes (SSWhite) e água destilada com o auxílio de taça de borracha, montadas em contra-ângulo; no segundo, pasta profilática Herjos-F (Vigodent), taça de borracha e contra-ângulo e no terceiro, jato de bicarbonato com o aparelho Profi II Ceramic (Dabi Atlante). Todos os procedimentos foram realizados pelo mesmo operador durante 10 s, lavados e armazenados em água destilada. As mensurações da rugosidade superficial, em æm, foram realizadas antes e após os procedimentos com o aparelho Perthomether S8P em 54 amostras e o restante foram metalizadas e avaliadas por meio de MEV. Os resultados obtidos pelas leituras no rugosímetro foram submetidos à análise estatística através do teste t (Student) de pares equiparados e o teste de Kruskal-Wallis associado ao teste de comparação múltipla de Dunn (5%). Pôde-se observar que a rugosidade superficial do esmalte humano obtida pelo tratamento com o jato de bicarbonato mostrou-se maior de maneira estatisticamente significante quando comparada àquela obtida com a pedrapomes, enquanto que a utilização da pasta profilática não apresentou diferenças estatisticamente significantes em relação à utilização dos outros dois métodos. Na avaliação ultra-estrutural, observou-se a presença de inúmeros grânulos com diâmetros variados e depressões acentuadas nas superfícies tratadas com o jato de bicarbonato. Concluiu-se que o jato de bicarbonato aumentou a rugosidade superficial quando comparado à pedrapomes.
The purpose of this in vitro study was to evaluate alterations in the surface roughness and micromorphology of human enamel submitted to three prophylaxis methods. Sixty nine caries-free molars with exposed labial surfaces were divided into three groups. The first group was treated with a rotary instrument set at a low speed, rubber cup and a mix of water and pumice slurry; the second, a rotary instrument set at a low speed, rubber cup and prophylaxis paste Herjos-F (Vigodent) and the third group, jet abrasive system with sodium bicarbonate Profi II Ceramic (Dabi Atlante). All procedures were performed by the same operator for 10 s, and samples were rinsed and stored in distilled water. Pre and post-treatment surface evaluation was completed using a surface profilometer (Perthomether S8P) in 54 samples. In addition, the other samples were coated with gold and examined in a scanning electron microscope (SEM). The results of this study were statistically analyzed with paired t-test (Student), Kruskal-Wallis test and Dunn (5%) test. The treatment with sodium bicarbonate jet significantly increased the human enamel surface roughness when compared with that of pumice paste. The use of prophylaxis paste Herjos-F, however, showed no statistically significant difference when compared with the other methods. Based on micromorphology analysis, the sodium bicarbonate jet presented an irregular surface with granular material and erosions. Based on this study, it could be concluded that there was increased enamel surface roughness when a tooth was treated with sodium bicarbonate jet when compared with pumice paste.
The purpose of this in vitro study was to evaluate alterations in the surface roughness and micromorphology of human enamel submitted to three prophylaxis methods. Sixty nine caries-free molars with exposed labial surfaces were divided into three groups. The first group was treated with a rotary instrument set at a low speed, rubber cup and a mix of water and pumice slurry; the second, a rotary instrument set at a low speed, rubber cup and prophylaxis paste Herjos-F (Vigodent) and the third group, jet abrasive system with sodium bicarbonate Profi II Ceramic (Dabi Atlante). All procedures were performed by the same operator for 10 s, and samples were rinsed and stored in distilled water. Pre and post-treatment surface evaluation was completed using a surface profilometer (Perthomether S8P) in 54 samples. In addition, the other samples were coated with gold and examined in a scanning electron microscope (SEM). The results of this study were statistically analyzed with paired t-test (Student), Kruskal-Wallis test and Dunn (5%) test. The treatment with sodium bicarbonate jet significantly increased the human enamel surface roughness when compared with that of pumice paste. The use of prophylaxis paste Herjos-F, however, showed no statistically significant difference when compared with the other methods. Based on micromorphology analysis, the sodium bicarbonate jet presented an irregular surface with granular material and erosions. Based on this study, it could be concluded that there was increased enamel surface roughness when a tooth was treated with sodium bicarbonate jet when compared with pumice paste.
Descrição
Palavras-chave
Esmalte dentário, Profilaxia dental, Microscopia eletronica de varredura, Dentes - Abrasão
Como citar
CASTANHO, Gisela Muassab. Estudo da rugosidade e ultra-estrutura superficial do esmalte dental humano submetido a diferentes métodos profiláticos. 2007. 87 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de São José dos Campos, 2007.