Detalhes bibliográficos
| Ano de defesa: |
2020 |
| Autor(a) principal: |
Nunes, Laura Smidt
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| Orientador(a): |
Mota, Eduardo Gonçalves
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| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Tese
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Pontifícia Universidade Católica do Rio Grande do Sul
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| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Odontologia
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| Departamento: |
Escola de Ciências Saúde e da Vida
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| País: |
Brasil
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://tede2.pucrs.br/tede2/handle/tede/10037
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Resumo: |
The aim of the study was to evaluate glycine as a new material used in dental prophylaxis. An abrasive powder used in an air jet polishing device. It was able to characterized the powder in its particle size and morphological characteristics and also its effects on different substrates compared to sodium bicarbonate powder. Five samples of each abrasive powder were used to get images in Scanning Electron Microscopy and to characterize their particles and surface morphology. To evaluate the effect of the powders, five samples of different substrates were taken. Dental enamel and dentin, composite resin and feldspar ceramic were the substrates studied. To determinate the effect of air polishing devices with the different powders, initial measurements (prior to the procedure) and after the jet with the respective material were taken and the average surface roughness (Ra) and three-dimensional images with Atomic Force Microscopy were used to represent the surface characteristic. Quantitative analyzes were submitted to the ANOVA and Tukey test and a descriptive analysis of the images was performed. Abrasive powders for prophylaxis showed a significant effect on the surface of enamel and feldspar ceramic. Sodium bicarbonate had a significant effect with increased enamel roughness (p = 0.08) and both powders had a significant inverse effect with reduced roughness in the ceramic (p = 0.01). In dentin and composite resin, the abrasive materials tested did not produce statistically significant changes (p = 0.30 and p = 0.31, respectively). The present study suggests the use of the glycine-based powder in the substrates instead of sodium bicarbonate. It was not possible to verify any evidence of superficial damage of this compared to bicarbonate and a unique |
