The evaluation of displacement resistance of glass FRC posts to root dentine using a thin slice push-out test

Int Endod J. 2009 Sep;42(9):802-10. doi: 10.1111/j.1365-2591.2009.01586.x. Epub 2009 Jun 22.


Aim: To investigate and compare the displacement resistance of glass fibre reinforced composite (FRC) posts to root dentine after luting with different adhesive systems.

Methodology: A total of 32 noncarious extracted human mandibular premolars were prepared for post-cementation using the FRC Postec system (Ivoclar Vivadent, Schaan, Liechtenstein) and divided into four groups (n = 8). The posts in each group were luted with one or other of the following materials. Group 1: Variolink II/Excite DSC (etch-and-rinse, dual-curing), group 2: Clearfil Esthetic Cement/ED Primer II (self-etch, dual-curing), group 3: Multilink/Multilink Primer (self-etch, chemical-curing) and group 4: Multilink Sprint (self-adhesive, dual-curing). Specimens were sectioned to obtain slices with the post in the centre and with the root dentine overlaid by the autopolymerizing acrylic resin on each side. The displacement resistance was measured using a Universal Testing Machine at a crosshead speed of 0.5 mm min(-1). The displacement resistance of the specimens were calculated and expressed in MPa. Data were analysed with one-way ANOVA and post hoc Tukey's test (P < 0.05).

Results: Mean (SD) values of displacement resistance data in MPa are as follows: group 1, 12.08 (2.13); group 2, 12.39 (2); group 3, 11.3 (1.23); group 4, 14.29 (1.84). There were statistically significant differences amongst the groups (P = 0.021). A statistically significant difference was observed for the displacement resistance values between groups 3 and 4 (P = 0.015), that is between Multilink/Multilink Primer and Multilink Sprint.

Conclusions: Glass FRC posts luted with self-adhesive luting system exhibited higher displacement resistance than when luted with chemical-curing self-etch luting system.

Publication types

  • Comparative Study

MeSH terms

  • Bicuspid
  • Dental Bonding / methods
  • Dental Debonding
  • Dental Etching / methods
  • Dental Restoration Failure
  • Dental Stress Analysis*
  • Dentin / drug effects*
  • Dentin-Bonding Agents / chemistry*
  • Glass
  • Humans
  • Mandible
  • Materials Testing
  • Post and Core Technique*
  • Resin Cements / chemistry*
  • Resin Cements / therapeutic use
  • Root Canal Therapy / instrumentation
  • Root Canal Therapy / methods
  • Stress, Mechanical
  • Tooth Root


  • Dentin-Bonding Agents
  • Resin Cements
  • fiberglass