In vitro evaluation of the cleansing working time and analysis of the amount of gutta-percha or Resilon remnants in the root canal walls after instrumentation for endodontic retreatment.
The present study assessed the obturation removal and reinstrumentation working time of canals filled with Resilon/Real Seal in comparison with canals filled with gutta-percha/AH Plus. Thirty human extracted canines were instrumented. In group 1 (n = 15) root canals were filled with Resilon/Real Seal and in group 2 (n = 15) with gutta-percha/AH Plus sealer. The obturations were removed from both by using chloroform and irrigation with 2.5% NaOCl, and the canals were manually reinstrumented. The teeth were radiographically analyzed. Specimens without obturation material remnants visible in the radiographic examination were selected for analysis under scanning electron microscopy. The Resilon/Real Seal system was removed in greater quantities from the canal walls compared with the gutta-percha cones and the AH Plus cement. Time was not a significant factor. Under scanning electron microscopy analysis, the teeth presented material remnants in the 3 analyzed thirds. Resilon was better removed from the canal than the gutta-percha cones and the AH Plus.
Endodontic Area, Centre for Dental Research, São Leopoldo Mandic University-Campinas, Campinas, Brazil. rscunha@dglnet.com.br
Rodrigo Sanches
RS
Cunha
Alexandre Sigrist
AS
De Martin
Pedro Paulo
PP
Barros
Fabiola Mendonça
FM
da Silva
Rogério de Castilho
RC
Jacinto
Carlos Eduardo da Silveira
CE
Bueno
D003188:Composite Resins; D003481:Cuspid; D017005:Dental Debonding / Q000295:instrumentation*; D004853:Epoxy Resins; D006171:Gutta-Percha; D006801:Humans; D019233:Retreatment; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000295:instrumentation*; D013997:Time Factors
D003188:Composite Resins; D004853:Epoxy Resins; C511498:Real Seal composite resin; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; C486892:resilon sealer; D006171:Gutta-Percha