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Capacidade de selamento apical de diferentes cimentos endodônticos em dentes com ápex aberto : estudo in vitro
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Abstract(s)
Objectivos: Como apareceu recentemente o NeoMTA2, um cimento endodôntico biocerâmico apresentado como sendo promissor nas apexificações, justifica-se de avaliar in vitro a sua capacidade de selamento apical utilizando a técnica da barreira apical com duas espessuras diferentes em dentes com ápices abertos pelo recurso do teste de microfiltração apical de corante e visualização pela diafanização.
Materiais e métodos: Foram utilizados 30 dentes monoradiculares humanos, distribuídos aleatoriamente em dois grupos de estudo (n=10) e dois grupos de controlo (n=5). Para estandardizar a amostra, os dentes foram instrumentados de maneira a simular um ápex aberto a 0,80mm de diâmetro e posteriormente distribuidos aleatoriamente nos dois grupos de trabalho consoante a espessura das barreiras apicais do grupo 1 (Barreira apical de NeoMTA2 de 4mm e obturação do restante canalar com guta-percha e NeoMTA 2) ou grupo 2 (Barreira apical de NeoMTA2 de 2mm e obturação do restante canalar com guta-percha e NeoMTA 2). A capacidade de selamento apical do NeoMTA 2 foi avaliada através do teste de microinfiltração apical por corante. A seguir, todas as amostras foram submetidas à diafanização de maneira a observar a extensão da penetração do corante dentro do material obturador com a ajuda duma lupa binocular. Os resultados foram analisados estatisticamente no programa IBM SPSS Statistics (versão 23.0) com recurso ao teste ANOVA e post-hoc Tukey HSD. O nível de significância foi de p ≤ 0,05.
Resultados: O grupo 2 foi o grupo que apresentou menor infiltração com um valor médio de 1.11mm, o grupo 1 apresentou valores médios de 1,57mm. Apesar das diferenças nos valores médios de cada grupo obturados com NeoMTA 2, estas não são estatisticamente significativas.
Conclusões: As espessuras das barreiras apicais testadas do cimento NeoMTA 2 não afectam a sua capacidade de selamento.
Aim: As NeoMTA2 is a recently introduced bioceramic endodontic cement presented as a promising material for apexification, it is therefore justified to evaluate its apical sealing ability in vitro by using the apical barrier technique with two different thicknesses in teeth with open apices using the dye apical microleakage test and visualization thanks to diaphanization technique. Material and methods: Thirty human single-rooted teeth were used, randomly distributed into two experimental groups (n=10) and two control groups (n=5). To standardize the sample, the teeth were instrumented to simulate an apex opened at a diameter of 0,80mm and then randomly distributed in two study groups according to the thickness of the apical barrier of the group 1 (4 mm NeoMTA 2 apical barrier and obturation of the remaining canal with gutta-percha and NeoMTA 2) and group 2 (2 mm NeoMTA 2 apical barrier and obturation of the remaining canal with gutta-percha and NeoMTA 2). The apical sealing ability of NeoMTA 2 was evaluated using a dye penetration microleakage test. All samples were then submitted to a diaphanization process in order to observe the extent of dye penetration into the obturation material with the aid of a binocular magnifying lens. The results were statistically analyzed using IBM SPSS Statistics software (version 23.0) with ANOVA and Tukey HSD post-hoc test. The level of significance was set at p ≤ 0.05. Results : Group 2 exhibited the lowest infiltration, with a mean value of 1.11 mm. Group 1 showed a mean value of 1.57 mm. Despite the differences in the mean values among the groups obturated with NeoMTA 2, these differences were not statistically significant. Conclusion: The thicknesses of the apical barriers tested with NeoMTA 2 cement do not affect its sealing ability.
Aim: As NeoMTA2 is a recently introduced bioceramic endodontic cement presented as a promising material for apexification, it is therefore justified to evaluate its apical sealing ability in vitro by using the apical barrier technique with two different thicknesses in teeth with open apices using the dye apical microleakage test and visualization thanks to diaphanization technique. Material and methods: Thirty human single-rooted teeth were used, randomly distributed into two experimental groups (n=10) and two control groups (n=5). To standardize the sample, the teeth were instrumented to simulate an apex opened at a diameter of 0,80mm and then randomly distributed in two study groups according to the thickness of the apical barrier of the group 1 (4 mm NeoMTA 2 apical barrier and obturation of the remaining canal with gutta-percha and NeoMTA 2) and group 2 (2 mm NeoMTA 2 apical barrier and obturation of the remaining canal with gutta-percha and NeoMTA 2). The apical sealing ability of NeoMTA 2 was evaluated using a dye penetration microleakage test. All samples were then submitted to a diaphanization process in order to observe the extent of dye penetration into the obturation material with the aid of a binocular magnifying lens. The results were statistically analyzed using IBM SPSS Statistics software (version 23.0) with ANOVA and Tukey HSD post-hoc test. The level of significance was set at p ≤ 0.05. Results : Group 2 exhibited the lowest infiltration, with a mean value of 1.11 mm. Group 1 showed a mean value of 1.57 mm. Despite the differences in the mean values among the groups obturated with NeoMTA 2, these differences were not statistically significant. Conclusion: The thicknesses of the apical barriers tested with NeoMTA 2 cement do not affect its sealing ability.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Diafanização Teste de microinfiltração por corante Capacidade de selamento apical NeoMTA 2