Revista de Odontologia da UNESP
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Revista de Odontologia da UNESP
Original Article

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

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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

Hidróxido de cálcio, ultrassom, irrigação

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

Calcium hydroxide, ultrasound, irrigation

References

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