title: An evaluation of the sealing ability of a polycaprolactone-based root canal filling material (Resilon) after retreatment.
abstract: OBJECTIVE
  The aim of this study was to evaluate the sealing ability of Resilon after retreatment.
  
  
  METHODS
  Sixty-six single-rooted mandibular premolars were enlarged to apical size 45 and then obturated with Resilon. The roots were randomly divided into 3 groups (n = 22/group). In group 1 no further treatment was done. Groups 2 and 3 were reinstrumented to apical size 60 using K-files and ProFile, respectively. In each group, 4 samples were kept for environmental scanning electron microscopy (ESEM) analysis. The remaining roots from groups 2 and 3 were refilled with Resilon. Sixteen roots from each group were then evaluated for microleakage; two roots served as controls. Data were analyzed statistically by Kruskall-Wallis test.
  
  
  RESULTS
  There were no significant differences between the experimental groups (P > .05). The ESEM showed new attachment of resin tags on the dentin surface of retreated roots.
  
  
  CONCLUSIONS
  Resilon can be used for retreatment, but it still allowed microleakage.
authors: Department of Endodontics and Conservative Dentistry, Guanghua College of Stomatology, Sun Yat-sen University, Guangzhou, China.
authors: Zheng-Mei
authors: ZM
authors: Lin
authors: Ashroy
authors: A
authors: Jhugroo
authors: Jun-Qi
authors: JQ
authors: Ling
mesh_terms: D001641:Bicuspid / Q000601:surgery*; D003763:Dental Leakage / Q000517:prevention & control*; D003804:Dentin / Q000648:ultrastructure; D006801:Humans; D011091:Polyesters / Q000737:chemistry / Q000627:therapeutic use; D019233:Retreatment / Q000379:methods; D012387:Root Canal Filling Materials / Q000737:chemistry* / Q000627:therapeutic use
chemical_list: D011091:Polyesters; D012387:Root Canal Filling Materials; C486892:resilon sealer; C016240:polycaprolactone