title: Evaluation of ethylenediaminetetraacetic acid (EDTA) solution and gel for smear layer removal.
abstract: The purpose of this in vitro study was to compare the efficacy of 24% ethylenediaminetetraacetic acid (EDTA) gel and 17% EDTA solution in cleaning dentine walls after root canal instrumentation. Thirty human canine teeth were divided into three groups of 10 teeth each. In Group 1, 1% sodium hypochlorite was used as the irrigating solution; in Group 2, 1% sodium hypochlorite was used with 17% EDTA solution; and in Group 3, 1% sodium hypochlorite was used with 24% EDTA gel. The presence of a smear layer was analysed after instrumentation using scanning electron microscopy. The Kruskal-Wallis test revealed a statistical difference (P < 0.05) between Groups 1 and 2, and also between Groups 1 and 3. No difference was observed between Groups 2 and 3 (P > 0.05). The results indicate that 1% sodium hypochlorite alone does not remove the smear layer and that there was no statistical difference between EDTA gel and EDTA solution in smear layer removal.
authors: Centro de Pesquisas Odontologicas Sao Leopoldo Mandic, Rua José Rocha Junqueira 13, CEP 13045-755 Campinas, SP, Brazil. dotto@viavale.com.br
authors: Sidney Ricardo
authors: SR
authors: Dotto
authors: Rosana Maria Coelho
authors: RM
authors: Travassos
authors: Elias Pandonor Motcy
authors: EP
authors: de Oliveira
authors: Manoel Eduardo de Lima
authors: ME
authors: Machado
authors: José Luiz
authors: JL
authors: Martins
mesh_terms: D002614:Chelating Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D003786:Dental Pulp Cavity / Q000187:drug effects* / Q000648:ultrastructure; D003804:Dentin / Q000187:drug effects* / Q000648:ultrastructure; D004492:Edetic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D005782:Gels; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012388:Root Canal Irrigants / Q000008:administration & dosage / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000008:administration & dosage / Q000627:therapeutic use; D012996:Solutions
chemical_list: D002614:Chelating Agents; D005782:Gels; D012388:Root Canal Irrigants; D012996:Solutions; D004492:Edetic Acid; D012973:Sodium Hypochlorite