EFFECT OF RESIN CEMENT TYPE ON THE COMPRESSIVE-BOND STRENGTH OF FIBER REINFORCED COMPOSITE POSTS. EXAMINATION AND ANALYSIS

Authors: Shahrzad TAHERI, Haleh MOGHARNAS, Mehrnaz KARIMI AFSHAR

Abstract:

Introduction. Resin cement is used to cement Fiber Reinforced Composite Posts (FRCP), but their bond strength can be influenced by the cement type. This study aimed at evaluating the effect of resin cement type on the bond strength of FRCP. Materials and methods.  40 extracted mandibular premolars – randomly divided into 2 groups according to cement type – and a minimum root length of 14 mm were cut from 1 mm above CEJ, and root canal treatment was performed on them. The push-out test was performed on 2 mm sections from the cervical, medial and apical areas of roots in the universal testing machine, at a speed of 1 mm/min. Bond strength was calculated in megapascals (MPa). The failure mode of the specimens was analyzed under a stereomicroscope at ×40 magnification. The data was statistically analyzed with SPSS 22 and the results were evaluated by ANOVA, chi2, at the significance level of p<0.05. Results and discussion. According to the results of this study, the highest bond strength was observed in Embrace WetBond. Luxacore cement showed less bond strength in all cutting areas. There were no significant differences between post-cement, cement-dentin fracture and type of cement. Conclusions. The type of cement can affect the bond strength of fiber posts. Further study on other types of cements is recommended.

Keywords:
  • bond strength
  • compressive strength
  • fiber post
  • RESIN CEMENT