Avaliação in vitro das alterações do esmalte humano, efetividade clínica e sensibilidade pós-clareamento dentário
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Data
2007-08-01
Autores
Murakami, Julio Tadashi [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste trabalho foi avaliar: a) em humanos, a efetividade clínica e a sensibilidade pós-clareamento dentário; b) in vitro, as alterações morfológicas e na composição química do esmalte após clareamento. Para a parte a, foram utilizados 60 dentes que possuíam indicação de exodontia por motivos ortodônticos. Após o registro da cor inicial, os dentes foram divididos em seis grupos de acordo com a técnica e material clareador utilizado: G 1 – dentes clareados com peróxido de hidrogênio 35% (PH) durante 40 minutos e fotoativados com LED; G 2 - peróxido de carbamida 35% (PC) durante 40 minutos+LED; G 3 - PH, sem fotoativação; G 4 - PC, sem fotoativação; G 5 – PH+LED e aplicação tópica de flúor durante 4 minutos; G 6 – PC+LED e aplicação tópica de flúor durante 4 minutos. Sete dias após o clareamento, foi realizado novo registro de cor dos dentes e questionamento quanto a sintomatologia pós-clareamento com o auxílio de uma escala visual. A sintomatologia pós-clareamento dentário e as alterações de cor foram avaliados estatisticamente pelo teste não paramétrico de Kruskal-Wallis e teste de Dunn. Para a parte b, foram utilizados 10 coroas de pré-molares que foram seccionados no sentido mesio-distal, resultando em duas metades. Cada metade foi dividida em quatro partes, além da incisal da face vestibular, resultando em 9 grupos: G 1 – PH+LED+flúor; G 2 – PH+LED; G 3 – PH+Flúor; G 4 – PH; G 5 – PC+LED+Flúor; G 6 – PC+LED; G 7 – PC+Flúor; G 8 – PC; G 9 (controle) – nenhum tratamento. Após a realização do clareamento, os espécimes foram mantidos em saliva artificial durante 30 minutos a 37oC e em seguida foram preparados para análise morfológica em microscopia eletrônica de varredura (MEV) e de composição química em espectrômetro de energia dispersiva (EDS). Os dados foram analisados pelo...
The aim of this study was to evaluate: a) in human beings, the clinical effectiveness and the sensitivity after dental bleaching; b) in vitro, the alterations in morphology and in chemical composition of the enamel after whitening. To topic a, it was 60 teeth that had indication of extraction for orthodontic causes. After registering the initial color, the teeth was divided in six groups in accordance to the technique and the bleaching material used: G 1 – teeth bleached with hydrogen peroxide 35% (HP) during 40 minutes and photoactivated by LED; G 2 – carbamide peroxide 35% (CP) during 40 minutes + LED; G 3 – HP, without activation; G 4 – CP, without activation; G 5 – HP + LED and topical fluor application during 4 minutes; G 6 – CP + LED and topical fluor application during 4 minutes. Seven days after the whitening process, a new registering was realized for the teeth color and questioning about the symptoms after whitening by means of a visual schedule. The symptoms after dental whitening and the alterations in the color were statistically evaluated using the non-parametric Kruskal-Wallis test and Dunn test. For the topic b, it was used 10 bicuspid teeth which were cut mesio-distally, resulting in two halves. Each half was divided in four parts, besides the incisal of the vestibular side, resulting in 9 groups: G 1 – HP + LED + fluor; G 2 – HP + LED; G 3 – HP + fluor; G 4 – HP; G 5 – CP + LED + fluor; G 6 – CP + LED; G 7 – CP + fluor; G 8 – CP; G 9 (control) – no treatment. After the bleaching process, the specimen were remained in artificial saliva for 30 minutes in 37° C and were promptly prepared to morphological analysis by scanning electronic microscope and to study the chemical composition in energy dispersive spectrometer. The data was analysed by Kruskal-Wallis test and Dunn multiple comparison. As to the color alteration... (Complete abstract click electronic access below)
The aim of this study was to evaluate: a) in human beings, the clinical effectiveness and the sensitivity after dental bleaching; b) in vitro, the alterations in morphology and in chemical composition of the enamel after whitening. To topic a, it was 60 teeth that had indication of extraction for orthodontic causes. After registering the initial color, the teeth was divided in six groups in accordance to the technique and the bleaching material used: G 1 – teeth bleached with hydrogen peroxide 35% (HP) during 40 minutes and photoactivated by LED; G 2 – carbamide peroxide 35% (CP) during 40 minutes + LED; G 3 – HP, without activation; G 4 – CP, without activation; G 5 – HP + LED and topical fluor application during 4 minutes; G 6 – CP + LED and topical fluor application during 4 minutes. Seven days after the whitening process, a new registering was realized for the teeth color and questioning about the symptoms after whitening by means of a visual schedule. The symptoms after dental whitening and the alterations in the color were statistically evaluated using the non-parametric Kruskal-Wallis test and Dunn test. For the topic b, it was used 10 bicuspid teeth which were cut mesio-distally, resulting in two halves. Each half was divided in four parts, besides the incisal of the vestibular side, resulting in 9 groups: G 1 – HP + LED + fluor; G 2 – HP + LED; G 3 – HP + fluor; G 4 – HP; G 5 – CP + LED + fluor; G 6 – CP + LED; G 7 – CP + fluor; G 8 – CP; G 9 (control) – no treatment. After the bleaching process, the specimen were remained in artificial saliva for 30 minutes in 37° C and were promptly prepared to morphological analysis by scanning electronic microscope and to study the chemical composition in energy dispersive spectrometer. The data was analysed by Kruskal-Wallis test and Dunn multiple comparison. As to the color alteration... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Clareamento dental, Peroxidos, Sensibilidade da dentina
Como citar
MURAKAMI, Julio Tadashi. Avaliação in vitro das alterações do esmalte humano, efetividade clínica e sensibilidade pós-clareamento dentário. 2007. 125 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Odontologia de São José dos Campos, 2007.