An Evaluation of Microbial Leakage in Roots Filled with a Thermoplastic Synthetic Polymer-Based Root Canal Filling Material (Resilon)

By Shipper G, rstavik D, Teixeira FB, Trope M.​

Date: 07/2005
Journal: JOE

Summary:  ​

Purpose: To compare bacterial leakage using S.mutans and E.faecalis through gutta-percha and a thermoplastic synthetic polymer-based root filling (Resilon) using two filling techniques during a 30-day period.


 n: 156 roots divided into 8 groups of 15 roots (groups 1–8) and 3 control groups (12 roots each)​

Table.1. Sticky wax was applied all over the root surface except for the apical 2 mm and the orifice. Microbial leakage was tested using Torabinejad model.​

– At completion of the leakage study, one Resilon and one gutta-percha specimen was randomly chosen. Each specimen was longitudinally sectioned and viewed under SEM.​


  • The Resilon groups were found to be superior to the gutta-percha groups with respect to the number and rate of leakage Table.2.​
  • Resilon showed minimal leakage group 8: 7%; groups 5–7: each with 13% leakage, significantly less than gutta-percha, in which 73%-93% leaked.​
  • All Resilon and Epiphany sealer groups leaked significantly less than all groups in which AH 26 was used as a sealer​
  • The dentin-filling interface of the longitudinal sections showed a 10 um uniform gap between gutta-percha and resin sealer Fig.1.​
  • There was no gap between the Resilon filling and Epiphany sealer Fig.2.​​


The excellent sealing capability of Resilon may be attributed to the “mono-block” contrast, gutta-percha filling pulled away from the AH 26 sealer, whereas the sealer remained against the dentin wall with its resin tags penetrating the dentin tubules