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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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Abstract(s)
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.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Hidróxido de cálcio Cimento biocerâmico Cimento de resina Infiltração apical