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Avaliação comparativa da capacidade de selamento apical de diferentes técnicas de obturações em dentes com apex aberto : estudo in vitro
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Abstract(s)
Objetivos e hipóteses: O objetivo do estudo in vitro foi comparar a infiltração com corante utilizando duas técnicas de obturação em dentes com diâmetro apical artificial reproduzidos em 1,20 mm e hipotetizou-se se existe diferença ou não de infiltração apical entre as técnicas.
Materiais e Métodos: A amostra integrou 30 dentes humanos, com diâmetro apical padronizado de 1,20 mm. Distribuíram-se dois grupos experimentais (n=10): GI cone único e cimento biocerâmico; GII plug apical seguido de cone único, ambos com NeoMTA® 2, Incluíram-se controlos positivo (n=5) e negativo (n=5). A infiltração foi avaliada por penetração de azul de metileno a 1%, com medição linear feita após secções de 1 mm dos espécimes. Cada fragmento foi colado em lâminas microscópicas para análise e posteriormente o registo do primeiro milímetro com evidência de penetração.
Resultados: Obtiveram-se valores de infiltração em todos os espécimes
experimentais. A análise estatística comparativa hierarquizou a eficácia de selamento entre GI com média de infiltração em 2,88 mm e GII com média de 3,66 mm e identificou que não existe diferença estatistica porem pode se observar uma menor infiltração para o GI.
Conclusão: Dentro das limitações inerentes a este estudo in vitro, conclui-se que nenhuma das técnicas testadas conseguiu impedir completamente a infiltração apical, embora ambas tenham exibido níveis variaveis de penetração do corante.
Objectives and Hypotheses: This in vitro study aimed to compare dye leakage using two obturation techniques in teeth with an artificially reproduced apical diameter of 1.20 mm, testing whether apical leakage differs between the techniques. Materials and Methods: The sample comprised 30 human teeth with a standardized apical diameter of 1.20 mm. Two experimental groups were established (n = 10 each): GI, single-cone technique with a bioceramic sealer; and GII, apical plug followed by single-cone, both using NeoMTA® 2. Positive (n = 5) and negative (n = 5) controls were included. Leakage was assessed by 1% methylene blue penetration, with linear measurement performed after sectioning the specimens into 1-mm slices. Each fragment was mounted on microscope slides for analysis, and the first millimetre showing evidence of dye penetration was recorded. Results: Leakage was observed in all experimental specimens. Comparative statistical analysis ranked sealing effectiveness between groups, with mean leakage of 2.88 mm for GI and 3.66 mm for GII and found no statistically significant difference; however, lower leakage was observed for GI. Conclusion: Within the limitations of this in vitro study, none of the techniques completely prevented apical leakage, although both exhibited varying levels of dye penetration.
Objectives and Hypotheses: This in vitro study aimed to compare dye leakage using two obturation techniques in teeth with an artificially reproduced apical diameter of 1.20 mm, testing whether apical leakage differs between the techniques. Materials and Methods: The sample comprised 30 human teeth with a standardized apical diameter of 1.20 mm. Two experimental groups were established (n = 10 each): GI, single-cone technique with a bioceramic sealer; and GII, apical plug followed by single-cone, both using NeoMTA® 2. Positive (n = 5) and negative (n = 5) controls were included. Leakage was assessed by 1% methylene blue penetration, with linear measurement performed after sectioning the specimens into 1-mm slices. Each fragment was mounted on microscope slides for analysis, and the first millimetre showing evidence of dye penetration was recorded. Results: Leakage was observed in all experimental specimens. Comparative statistical analysis ranked sealing effectiveness between groups, with mean leakage of 2.88 mm for GI and 3.66 mm for GII and found no statistically significant difference; however, lower leakage was observed for GI. Conclusion: Within the limitations of this in vitro study, none of the techniques completely prevented apical leakage, although both exhibited varying levels of dye penetration.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Tratamento apex aberto Plug MTA Infiltração de corantes Selamento apex aberto