Are dentin posts biomechanically intensive?: A laboratory and FEA study

Abstract

The goal of this laboratory and finite elemental stress analysis (FEA) study was to compare fracture strength of dentin post (DP) with stainless steel and glass fiber posts. Single-rooted teeth were decoronated and restored with ParaPost (PP), i-TFC (TFC), and DPs (n = 10). Resin cores were created and loaded until failure (1.0 mm/min). The data were analyzed (ANOVA, Tukey, Chi-Square tests). Three-dimensional FEA models of the posts were created and the stress distributions were calculated using Solid Works/Cosmos works structural analysis program. A significant difference was found among the groups (p < 0.001). TFC group showed the highest and the DP group showed the lowest fracture resistance (p < 0.001). PP created more stress at the root dentin and inside the post. Restoration of roots with glass fiber and DPs may reduce stresses within the core material and the remaining root. However, a fracture-resistant restoration cannot be achieved by using a DP.

Keywords:

• dentin post
• finite element analysis
• stress
• fracture resistance
• root fracture

Acknowledgments

This study was performed in the Research Center of Dental Faculty of Selcuk University and supported in part by Scientific Research Projects Coordination Center (BAP) of Selcuk University, Konya, Turkey. The authors thank Dr Serhan Akman for statistical analysis.

Notes

Presented at the 5th International Congress on Adhesive Dentistry – IAD 2013, Philadelphia, USA, June 2013 and supported in part by Selçuk University Scientific Research Projects Coordination Unit (BAP), Konya, Turkey