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


Torabinejad M, Handysides R, Khademi AA, Bakland LK. Clinical implications of the smear layer in endodontics: a review. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2002 Dec;94(6):658-66. PMid:12464887.

Takahashi K. Microbiological, pathological, inflammatory, immunological and molecular biological aspects of perirradicular desease. Int Endod J. 1998 Sep;31(5):311-25. PMid:9823133.

Ari H, Erdemir A. Effects on endodontic irrigation solutions on mineral content of root canal dentin using ICP-AES technique. J Endod. 2005 Mar;31(3):187-9. PMid:15735466.

Hauman CH, Love RM. Biocompatibility of dental materials used in contemporary endodontic therapy: a review. Part 1. Intracanal drugs and substances. Int Endod J. 2003 Feb;36(2):75-85. PMid:12657150.

Ari H, Yasar E, Belli S. Effects on NaOCl on bond strengths of resin cements to root canal dentin. J Endod. 2003 Apr;29(4):248-51. PMid:12701772.

Guerisoli DMZ, Sousa Neto MD, Pécora JD. Ação do hipoclorito de sódio em diversas concentrações sobre a estrutura dentinária. Rev Odontol UNAERP. 1998;1(1):3-6.

Mountouris G, Silikas N, Eliades G. Effect of sodium hypochlorite treatment on the molecular composition and morphology of human coronal dentin. J Adhes Dent. 2004;6(3):175-82. PMid:15536846.

Liu R, Hou BX, Wesselink PR, Wu MK, Shemesh H. The Incidence of root microcracks caused by 3 different single-file systems versus the ProTaper system. J Endod. 2013 Aug;39(8):1054-6. PMid:23880276.

Palazzi F, Blasi A, Mohammadi Z, Del Fabbro M, Estrela C. Penetration of sodium hypochlorite modified with surfactants into root canal dentin. Braz Dent J. 2016 Mar-Apr;27(2):208-16. PMid:27058386.

Soares CJ, Pizi ECG, Fonseca RB, Martins LRM. Influence of root embedment material and periodontal ligament simulation on fracture resistance tests. Braz Oral Res. 2005 Mar;19(1):11-6. PMid:16229350.

Bürklein S, Tsotsis P, Schäfer E. Incidence of dentinal defects after root canal preparation: reciprocating versus rotary instrumentation. J Endod. 2013 Apr;39(4):501-4. PMid:23522545.

Fimple JL, Fontana CR, Foschi F, Ruggiero K, Song X, Pagonis TC, et al. Photodynamic treatment of endodontic polymicrobial infection in vitro. J Endod. 2008 Jun;34(6):728-34. PMid:18498901.

International Organization for Standardization – ISO. ISO/TS 11405: dental materials: testing of adhesion to tooth structure. Genebra; 2003. Technical specification.

Hin ES, Wu MK, Wesselink PR, Shemesh H. Effects of self-adjusting file, Mtwo, and ProTaper on the root canal wall. J Endod. 2013 Feb;39(2):262-4. PMid:23321242.

Hülsmann M, Peters OA, Dummer PMH. Mechanical preparation of root canals: shaping goals, techniques and means. Endod Topics. 2005 Mar;10(1):30-76.

Andrabi SM, Kumar A, Zia A, Iftekhar H, Alam S, Siddiqui S. Effect of passive ultrasonic irrigation and manual dynamics irrigation on smear layer removal from root canals in a closed apex in vitro model. J Investig Clin Dent. 2014 Aug;5(3):188-93. PMid:23595996.

Siqueira JF Jr, Rôças IN, Favieri A, Lima KC. Chemomechanical reduction of the bacterial population in the root canal after instrumentation and irrigation with 1%, 2,5%, and 5,25% sodium hypochlorite. J Endod. 2000 Jun;26(6):331-4. PMid:11199749.

Del Carpio-Perochena AE, Bramante CM, Duarte MA, Cavenago BC, Villas-Boas MH, Graeff MS, et al. Biofilm dissolution and cleaning ability of different irrigant solutions on intraorally infected dentin. J Endod. 2011 Aug;37(8):1134-8. PMid:21763908.

Yared G. Canal preparation using only one Ni-Ti rotary instrument: preliminary observations. Int Endod J. 2008 Apr;41(4):339-44. PMid:18081803.

De-Deus G, Silva EJ, Marins J, Souza E, Neves AA, Gonçalves Belladonna F, et al. Lack of causal relationship between dentinal microcracks and root canal preparation with reciprocation systems. J Endod. 2014 Sep;40(9):1447-50. PMid:25146030.

Assif D, Nissan J, Gafni Y, Gordon M. Assessment of the resistance to fracture of endodontically treated molars restored with amalgam. J Prosthet Dent. 2003 May;89(5):462-5. PMid:12806323.

Agee KA, Prakki A, Abu-Haimed T, Naguib GH, Nawareg MA, Tezvergil-Mutluay A, et al. Water distribution in dentin matrices: bound vs. unbound water. Dent Mater. 2015 Mar;31(3):205-16. PMid:25612786.

Lee BS, Hsieh TT, Chi DC, Lan WH, Lin CP. The role of organic tissue on the punch shear strength of human dentin. J Dent. 2004 Feb;32(2):101-7. PMid:14749081.

Versiani MA, Souza E, De-Deus G. Critical appraisal of studies on dentinal radicular microcracks in endodontics: methodological issues, contemporary concepts, and future perspectives. Endod Topics. 2015 Nov;33(1):87-156.

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