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Efeito do hidróxido de cálcio usado enquanto medicação intracanal na capacidade de selamento apical de dois cimentos endodônticos : um estudo comparativo in vitro
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Objetivo: Avaliar se o uso de Hidróxido de cálcio (HC) como medicação intracanal (MI) tem influência na capacidade de selamento apical de dois cimentos endodônticos.
Materiais e métodos: Setenta e dois dentes humanos monorradiculares foram divididos em três grupos. Estes foram instrumentados com o sistema Protaper Gold™ (S1 a F3) e obturados provisoriamente conforme o grupo experimental (G1 – Calmix®; G2 – HC em veículo aquoso; G3 – Sem MI). Após 14 dias o HC foi removido através de irrigação ultrassónica passiva (PUI). Cada grupo foi dividido em 2 subgrupos segundo o cimento utilizado na obturação (subgrupos A - BioRoot™ RCS; subgrupos B - AH Plus®).
Reservaram-se todos os espécimes por 28 dias após os quais as raízes foram envernizadas excetuando os 3mm apicais e imersas em azul de metileno 1% por 72h. As raízes foram seccionadas transversalmente e estas foram observadas ao microscópio clínico para identificação do nível de infiltração de corante.
Os resultados foram compilados em tabelas Excel e estatisticamente analisadas no programa SPSS através do teste ANOVA fatorial.
Resultados: Todos os grupos experimentais tiveram infiltração; o subgrupo 1B (Calmix® /AH Plus®) teve a maior média de profundidade de infiltração, 9.00mm e o subgrupo 1A (Calmix® /BioRoot™ RCS) teve a menor média de profundidade de infiltração, 2.88m, sendo esta diferença estatisticamente significativa (p = 0.005).
Conclusão: Todos os grupos experimentais tiveram algum grau de infiltração. Não houve diferença estatisticamente significativa quanto ao tipo de MI usada. Os cimentos utilizados não tiveram diferenças estatisticamente significativas embora o BioRoot™ RCS tenha tido menor profundidade de infiltração em todos os subgrupos e a capacidade e selamento apical do AH Plus® tenha sido afetada pelo veículo do HC.
Objective: To evaluate if the use of calcium hidroxide (CH) as an intracanal medication (IM) can influence the apical sealing ability of two endodontic cements. Methodology: Seventy-two human single rooted teeth were selected and divided in three groups. These were instrumented with the Protaper Gold™ system (S1 to F3) and provisionally filled according to the experimental group (G1 – Calmix®; G2 – Powder CH; G3 – No intracanal medication). After 14 days the calcium hydroxide was removed by passive ultrassonic irrigation (PUI). Each group was divided into 2 subgroups and filled with the respective endodontic cement (A groups - BioRoot™ RCS; B groups – AH Plus®). All specimens were incubated for 28 days, after which the roots were varnished throughout except the apical 3mm and embedded in methylene blue 1% for 72h. The roots were sectioned into slices and these were observed under a clinical microscope to identify the level of dye infiltration. The results were compiled in Excel tables and statistically analyzed on SPSS software through factorial ANOVA tests. Results: The results show that all groups had some degree of infiltration. Subgroup 1B (Calmix®/AH Plus®) had the highest mean infiltration depth at 9.00mm; the group with the lowest mean infiltration depth was group 1A (Calmix®/BioRoot™ RCS) 2.88mm, these being statistically diferente (p = 0.005). Conclusion: All groups presented some degree of infiltration. There was no statistical difference regarding the intracanal medication used. The ciments did not have statistically different results with BioRoot™ RCS having less infiltration in all subgroups; AH Plus® was affected by the vehicle in which the HC was included.
Objective: To evaluate if the use of calcium hidroxide (CH) as an intracanal medication (IM) can influence the apical sealing ability of two endodontic cements. Methodology: Seventy-two human single rooted teeth were selected and divided in three groups. These were instrumented with the Protaper Gold™ system (S1 to F3) and provisionally filled according to the experimental group (G1 – Calmix®; G2 – Powder CH; G3 – No intracanal medication). After 14 days the calcium hydroxide was removed by passive ultrassonic irrigation (PUI). Each group was divided into 2 subgroups and filled with the respective endodontic cement (A groups - BioRoot™ RCS; B groups – AH Plus®). All specimens were incubated for 28 days, after which the roots were varnished throughout except the apical 3mm and embedded in methylene blue 1% for 72h. The roots were sectioned into slices and these were observed under a clinical microscope to identify the level of dye infiltration. The results were compiled in Excel tables and statistically analyzed on SPSS software through factorial ANOVA tests. Results: The results show that all groups had some degree of infiltration. Subgroup 1B (Calmix®/AH Plus®) had the highest mean infiltration depth at 9.00mm; the group with the lowest mean infiltration depth was group 1A (Calmix®/BioRoot™ RCS) 2.88mm, these being statistically diferente (p = 0.005). Conclusion: All groups presented some degree of infiltration. There was no statistical difference regarding the intracanal medication used. The ciments did not have statistically different results with BioRoot™ RCS having less infiltration in all subgroups; AH Plus® was affected by the vehicle in which the HC was included.
Descrição
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Palavras-chave
Hidróxido de cálcio Cimento biocerâmico Cimento de resina Infiltração apical