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Capacidade de selamento apical em endodontia : estudo in vitro de materiais obturadores em dentes com ápex aberto
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Objetivo: O presente estudo in vitro teve como objetivo avaliar a capacidade de selamento apical de dois cimentos endodônticos com composições distintas, um resinoso (AH Plus®) e um biocerâmico (BioRoot™ RCS), em dentes com ápice artificialmente aberto.
Materiais e Métodos: A amostra foi composta por cinquenta dentes humanos monorradiculares, divididos aleatoriamente em dois grupos experimentais (n = 40) e dois grupos controlo (n = 10). O Grupo 1 (G1; n = 20) foi instrumentado até 0,7 mm com Peeso #1, e o Grupo 2 (G2; n = 20) até 0,9 mm com Peeso #2, simulando condições de ápice aberto. Cada grupo foi subdividido conforme o cimento obturador utilizado — S1 (AH Plus®) e S2 (BioRoot™ RCS) —, originando quatro subgrupos experimentais: G1S1, G1S2, G2S1 e G2S2 (n = 10). Todos os espécimes foram obturados pela técnica de cone único. Para avaliar a selamento apical, realizou-se teste de infiltração apical com corante azul de metileno a 1%. Após a imersão, as raízes foram seccionadas
transversalmente em micrótomo e analisadas por microscopia ótica, registando-se a infiltração apical em milímetros. Os dados foram tratados estatisticamente no programa SPSS (IBM Corp., EUA), utilizando-se o teste ANOVA fatorial, com nível de significância de p < 0,05.
Resultados: A análise estatística revelou diferença significativa entre os grupos experimentais (p = 0,008), indicando que o aumento do diâmetro apical está associado a maior infiltração apical. Todavia, não se observaram diferenças significativas entre os tipos de cimento (p = 0,085), demonstrando desempenho semelhante entre o AH Plus® e
o BioRoot™ RCS. Apenas a comparação entre os subgrupos G1S1 e G2S2 apresentou diferença estatisticamente significativa.
Conclusão: O diâmetro apical mostrou-se o principal fator de influência na infiltração, enquanto o tipo de cimento não afetou significativamente o selamento quando avaliado isoladamente.
Objective: This in vitro study aimed to evaluate the apical sealing ability of two endodontic sealers with distinct compositions — a resin-based sealer (AH Plus®) and a bioceramic sealer (BioRoot™ RCS) — in teeth with artificially opened apices. Materials and Methods: The sample consisted of fifty extracted human single-rooted teeth, randomly divided into two experimental groups (n = 40) and two control groups (n = 10). Group 1 (G1; n = 20) was instrumented up to 0.7 mm using Peeso #1, and Group 2 (G2; n = 20) up to 0.9 mm using Peeso #2, simulating open-apex conditions. Each group was subdivided according to the sealer used — S1 (AH Plus®) and S2 (BioRoot™ RCS) — resulting in four experimental subgroups: G1S1, G1S2, G2S1, and G2S2 (n = 10). All specimens were obturated using the single-cone technique. To assess apical sealing, a 1% methylene blue dye penetration test was performed. After immersion, the roots were transversely sectioned with a microtome and analyzed under optical microscopy to measure apical leakage in millimeters. Data were statistically analyzed using SPSS software (IBM Corp., USA) with factorial ANOVA, considering a significance level of p < 0.05. Results: The statistical analysis revealed a significant difference between the experimental groups (p = 0.008), indicating that increasing the apical diameter leads to greater dye penetration. However, no significant differences were found between the two sealers (p = 0.085), demonstrating comparable sealing performance for AH Plus® and BioRoot™ RCS. Only the comparison between subgroups G1S1 (AH Plus®/0.70 mm) and G2S2 (BioRoot™ RCS/0.90 mm) showed a statistically significant difference. Conclusion: The apical diameter proved to be the main factor influencing apical leakage, while the sealer type alone did not significantly affect the sealing ability.
Objective: This in vitro study aimed to evaluate the apical sealing ability of two endodontic sealers with distinct compositions — a resin-based sealer (AH Plus®) and a bioceramic sealer (BioRoot™ RCS) — in teeth with artificially opened apices. Materials and Methods: The sample consisted of fifty extracted human single-rooted teeth, randomly divided into two experimental groups (n = 40) and two control groups (n = 10). Group 1 (G1; n = 20) was instrumented up to 0.7 mm using Peeso #1, and Group 2 (G2; n = 20) up to 0.9 mm using Peeso #2, simulating open-apex conditions. Each group was subdivided according to the sealer used — S1 (AH Plus®) and S2 (BioRoot™ RCS) — resulting in four experimental subgroups: G1S1, G1S2, G2S1, and G2S2 (n = 10). All specimens were obturated using the single-cone technique. To assess apical sealing, a 1% methylene blue dye penetration test was performed. After immersion, the roots were transversely sectioned with a microtome and analyzed under optical microscopy to measure apical leakage in millimeters. Data were statistically analyzed using SPSS software (IBM Corp., USA) with factorial ANOVA, considering a significance level of p < 0.05. Results: The statistical analysis revealed a significant difference between the experimental groups (p = 0.008), indicating that increasing the apical diameter leads to greater dye penetration. However, no significant differences were found between the two sealers (p = 0.085), demonstrating comparable sealing performance for AH Plus® and BioRoot™ RCS. Only the comparison between subgroups G1S1 (AH Plus®/0.70 mm) and G2S2 (BioRoot™ RCS/0.90 mm) showed a statistically significant difference. Conclusion: The apical diameter proved to be the main factor influencing apical leakage, while the sealer type alone did not significantly affect the sealing ability.
Descrição
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Palavras-chave
Infiltração apical Cimentos resinosos Cimentos biocerâmicos Ápice aberto