Evaluation of ethylenediaminetetraacetic acid (EDTA) solution and gel for smear layer removal.
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.
Dotto
Sidney Ricardo
SR
Centro de Pesquisas Odontologicas Sao Leopoldo Mandic, Rua José Rocha Junqueira 13, CEP 13045-755 Campinas, SP, Brazil. dotto@viavale.com.br
Travassos
Rosana Maria Coelho
RM
de Oliveira
Elias Pandonor Motcy
EP
Machado
Manoel Eduardo de Lima
ME
Martins
José Luiz
JL
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
D002614:Chelating Agents; D005782:Gels; D012388:Root Canal Irrigants; D012996:Solutions; D004492:Edetic Acid; D012973:Sodium Hypochlorite