Eficácia da irrigação ultrassônica passiva na remoção de hidróxido de cálcio
Efficacy of irrigation ultrasonic passive in removal of calcium hydroxide paste from root canals
Zart, Priscila Tahani M.; Michelon, Carina; Zanatta, Fabricio Batistim; Bier, Carlos Alexandre S.; Manfio, Angelo Pegoraro
Resumo
Introdução: Remanescentes de Hidróxido de Cálcio [Ca(OH)2] podem interferir na qualidade da obturação endodôntica. Objetivo: Avaliar a eficácia da Irrigação Ultrassônica Passiva (IUP) associada à técnica convencional na remoção de medicação intracanal à base de Ca(OH)2. Metodologia: Trinta dentes humanos anteriores monorradiculares foram usados. Os canais radiculares foram preparados com instrumentos manuais tipo K e preenchidos com medicação intracanal à base de Ca(OH)2, contendo PMCC e propilenoglicol. Após sete dias, a pasta de Ca(OH)2 foi removida de todos os canais radiculares com um instrumento manual e irrigação de NaOCl 1% com seringa. Os espécimes foram randomizados em dois grupos (n=12) de acordo com a irrigação final: Irrigação Manual – agitação manual de EDTA 17 % e irrigação de NaOCl 1%; IUP – agitação ultrassônica de NaOCl 1% (três ativações de 20s) seguida da ativação de EDTA 17% por 1 min. O Grupo Controle (n=6) não recebeu medicação intracanal. Todos os espécimes foram clivados e a quantidade de Ca(OH)2 remanescente foi calculada com o auxílio do estereomicroscrópio (20×). Os testes Kruskall-Wallis e Wilcoxon foram utilizados para avaliar a porcentagem de Ca(OH)2 remanescente. Resultado: O grupo da IUP apresentou, estatisticamente, as menores porcentagens de Ca(OH)2 remanescente, quando comparado ao grupo da Irrigação Manual, independentemente dos terços analisados (P < 0,05). O terço apical apresentou a maior quantidade de medicação residual, em ambos os grupos (P < 0,05). Conclusão: A associação da IUP com a técnica convencional demonstrou ser mais eficiente na remoção de medicação intracanal à base de Ca(OH)2 do que a combinação da Irrigação Manual com a técnica convencional.
Palavras-chave
Abstract
Introduction: Remnants of calcium hydroxide (Ca(OH)2) can interfere in the quality of endodontic treatment. Aim: Evaluate the efficacy of Passive Ultrasonic Irrigation (PUI) associated with the conventional technique in removing intracanal medication Ca(OH)2-based. Methodology: Thirty monoradiculares anterior human teeth were used. The root canals were prepared with manual instruments type K and filled with intracanal medication Ca(OH)2-based containing CMCP and propylene glycol. After 7 days, Ca(OH)2 was removed of all root canal with a manual instrument and irrigation of the 1% NaOCl with syringe. The specimens were randomly divided into two groups (n=12) according to the final irrigation: Manual Irrigation – manual agitation of 17% EDTA and 1% NaOCl irrigation; PUI - ultrasonic agitation of NaOCl 1% (3 activations of 20s) followed by activation of 17% EDTA for 1 min. The control group (n=6) received no medication. All the specimens were cleaved and the amount of Ca(OH)2 remaining was calculated with the auxiliary of estereomicroscrópio (20×). Kruskall-Wallis tests and Wilcoxon tests were used to evaluate the percentage of Ca(OH)2 remaining. Result: The group of PUI showed statistically the lowers percentages of Ca(OH)2 when compared to group of Manual Irrigation, independently, of thirds analyzed (P < 0.05). The apical showed the higher amount of residual medication, in both groups (P < 0.05). Conclusion: The association of PUI with the conventional technique proved to be more efficient in removing medication of Ca(OH)2-based that the combination of Manual irrigation with conventional technique.
Keywords
Referências
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