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Avaliação da progressão de desgaste dentário erosivo em esmalte e dentina com um scanner 3D intraoral : estudo in vitro
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Advisor(s)
Abstract(s)
Objetivo: Validar a utilização do scanner intraoral 3M™ ESPE True Definition na quantificação de Erosão Dentária utilizando como método de referência o Interferómetro de Luz Branca Profilm3D da Filmetrics™.
Materiais e Métodos: Cinco dentes molares humanos, extraídos, foram submetidos a desinfeção e, posteriormente, seccionados de forma a obter amostras de esmalte (n=7). As amostras foram acrilizadas e polidas, sendo de seguida analisadas com o Scanner Intraoral e com o Interferómetro, de forma a obter uma referência, ou baseline, antes de iniciar os ciclos de erosão e remineralização. Posteriormente, as amostras foram submetidas ao protocolo de erosão/remineralização, que consistiu em 3 imersões (4 min) na bebida Sprite™, com agitação controlada, intercaladas com 1 h de imersão em saliva artificial. Após o ciclo de erosão/remineralização, as amostras voltaram a ser analisadas com ambos os métodos e calculou-se por cada um a quantidade de material dentário perdido. Os valores de perda de material dentário obtidos foram analisados estatisticamente com o teste t-student para amostras emparelhadas.
Resultados: A perda de material dentário medida por Interferometria foi de 9,54 ± 4,45 μm. O aumento de profundidade após erosão medido por este método, foi estatisticamente significativo (t (6) = - 5,666, p = 0,001). Os resultados com o Scanner Intraoral indicaram também uma perda de material dentário após o ciclo erosivo. O valor médio de perda de material dentário foi de 14,19 ± 8,56 μm. Os valores detetados com o Scanner Intraoral mostraram uma tendência para superar os valores medidos através de Interferometria. Esta diferença, que foi em média de -4,66 ± 5,31 μm, não se revelou no entanto estatisticamente significativa (t(6) = - 2,320, p = 0,059).
Conclusão: O Scanner Intraoral quantificou desgaste dentário erosivo inicial, in vitro, de forma comparável à Interferometria de Luz Branca.
Objective: Validate the use of the intraoral scanner 3M™ ESPE True Definition in the quantification of Dental Erosion using the Profilm3D White Light Interferometer from Filmetrics™ as a reference method. Materials and Methods: Five human molar teeth, extracted, were submitted to a disinfection protocol and then sectioned to obtain enamel samples (n=7). The samples were acrylized and polished and then analyzed with the Intraoral Scanner and Interferometer in order to obtain a reference, or baseline, before starting the erosion and remineralization cycles. Subsequently, the samples were submitted to the erosion/remineralization protocol, which consisted of 3 immersions (4 min each) in the soft drink Sprite™, with controlled agitation, interspersed with 1 h of immersion in artificial saliva. After the erosion/remineralization cycle, the samples were analyzed again with both methods and the amount of dental material lost was calculated for each one. The values of tooth material loss obtained were statistically analyzed with the t-student test for paired samples. Results: The average tooth loss measured by Interferometry was 9,54 ± 4,45 μm. The increase in depth after erosion, measured by this method, was statistically significant (t (6) = - 5,666, p = 0,001). The results with the Intraoral Scanner also indicated a loss of dental material after the erosive cycle. The average tooth material loss with this method was 14,19 ± 8,56 μm. The values measured with the Intraoral Scanner showed a trend to exceed the ones measured by Interferometry. However, the difference (-4,66 ± 5,31 μm) was not statistically significant (t (6) = - 2,320, p = 0,059). Conclusion: The Intraoral Scanner quantified initial erosive tooth wear, in vitro, not differently from White Light Interferometry.
Objective: Validate the use of the intraoral scanner 3M™ ESPE True Definition in the quantification of Dental Erosion using the Profilm3D White Light Interferometer from Filmetrics™ as a reference method. Materials and Methods: Five human molar teeth, extracted, were submitted to a disinfection protocol and then sectioned to obtain enamel samples (n=7). The samples were acrylized and polished and then analyzed with the Intraoral Scanner and Interferometer in order to obtain a reference, or baseline, before starting the erosion and remineralization cycles. Subsequently, the samples were submitted to the erosion/remineralization protocol, which consisted of 3 immersions (4 min each) in the soft drink Sprite™, with controlled agitation, interspersed with 1 h of immersion in artificial saliva. After the erosion/remineralization cycle, the samples were analyzed again with both methods and the amount of dental material lost was calculated for each one. The values of tooth material loss obtained were statistically analyzed with the t-student test for paired samples. Results: The average tooth loss measured by Interferometry was 9,54 ± 4,45 μm. The increase in depth after erosion, measured by this method, was statistically significant (t (6) = - 5,666, p = 0,001). The results with the Intraoral Scanner also indicated a loss of dental material after the erosive cycle. The average tooth material loss with this method was 14,19 ± 8,56 μm. The values measured with the Intraoral Scanner showed a trend to exceed the ones measured by Interferometry. However, the difference (-4,66 ± 5,31 μm) was not statistically significant (t (6) = - 2,320, p = 0,059). Conclusion: The Intraoral Scanner quantified initial erosive tooth wear, in vitro, not differently from White Light Interferometry.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Erosão dentária Quantificação desgaste dentário Scanner Intraoral Interferometria