Revista de Odontologia da UNESP
ISSN 1807-2577 (Eletrônico)
Artigo Original

Influência da solução irrigadora na formação de defeitos dentinários após preparo com Sistema Reciproc®

Influence of defects in solution irrigating dentinal training after preparation with System Reciproc®

Esther Saraiva Batista Vieira MENDONÇA; Key Fabiano Souza PEREIRA


Resumo: Introdução: Diferentes concentrações de hipoclorito de sódio (NaOCl) estão disponíveis para serem utilizadas durante o preparo biomecânico dos canais radiculares pelos instrumentos reciprocantes. Devido à rapidez com que o canal é instrumentado nessa nova cinemática reciprocante, concentrações mais elevadas de NaOCl são recomendadas. Assim, torna-se oportuna uma investigação para avaliar se a solução irrigadora NaOCl potencializa a possibilidade de formação de defeitos dentinários provocados pelo sistema Reciproc.

Objetivo: Analisar a influência da solução irrigadora hipoclorito de sódio na formação de defeitos dentinários provocados pelo sistema de instrumentação Reciproc®.

Material e método: Foram utilizados 60 primeiros pré-molares superiores extraídos, sendo estes distribuídos em dois grupos: (G1) NaOCl 5,25% (n=30) e (G2-controle) água destilada (n=30), nos quais somente o conduto vestibular foi instrumentado com o Sistema Reciproc® e irrigado com as soluções citadas. Todas as coroas dos dentes foram cortadas perpendicularmente ao seu longo eixo e as raízes foram incluídas em alvéolo e ligamento periodontal simulados. Os condutos palatinos não foram instrumentados nem irrigados, pois estes serviram como controle para o próprio espécime. Ao término da instrumentação, as raízes foram seccionadas em 2, 4, 6 e 8 mm a partir do forame apical, e levadas ao microscópio estereoscópico para se avaliar e registrar a formação de defeitos dentinários.

Resultado: Foram encontrados defeitos dentinários no Grupo controle (G2) e no grupo hipoclorito de sódio 5,25% (G1), porém não houve diferença estatisticamente significante entre esses grupos (p>0,05).

Conclusão: O hipoclorito de sódio não desencadeou alterações de defeitos dentinários quando utilizado em associação com a instrumentação pelo Sistema Reciproc®.



Preparo de canal radicular, irrigantes do canal radicular, instrumentos odontológicos


Abstract: Introduction: Different sodium hypochlorite concentrations are available for use during the mechanical preparation of root canals by reciprocating instruments. Because of the speed with which the channel is instrumented in this new reciprocating kinematics, higher concentrations of sodium hypochlorite (NaOCl) has been recommended. Thus, it is opportune to research to evaluate whether the irrigant NaOCl solution enhances the possibility of formation of dentinal defects caused by Reciproc system.

Objective: To analyze the influence of irrigating sodium hypochlorite solution in the formation of dentinal defects caused by Reciproc® instrumentation system.

Material and method: We used 60 extracted first premolars were divided into two groups (G1) NaOCl 5.25% (n = 30); (G2 Control) Distilled water (n = 30), only the buccal conduit was instrumented with Reciproc® system and irrigated with the solutions. All the crowns of the teeth were cut perpendicular to the long axis, and the roots included in alveoli and simulated periodontal ligament. Palatal conduits were not instrumented or irrigated, because they served as a control for the specimen itself. At the end of the instrumentation, the roots were cut at 2, 4, 6 and 8 mm from the apical foramen and taken to the stereoscopic microscope to assess and record the formation of dentinal defects.

Result: Dentinal defects were found in the control group (G2) and sodium hypochlorite 5.25% group (G1), but no statistically significant difference between them (p> 0.05).

Conclusion: Sodium hypochlorite not triggered dentinal defects changes when used in combination with instrumentation for Reciproc® system.


Root canal preparation, root canal irrigants, dental instruments


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