Comparative Evaluation of Fracture Resistance under Static and Fatigue Loading of Endodontically Treated Teeth Restored with Carbon Fiber Posts, Glass Fiber Posts, and an Experimental Dentin Post System: An In Vitro Study

Introduction: this investigation sought to compare-the fracture resistance under statio and fatigue loading of endodontically treated teeth restored: with fiber-reinforced composite posts and experimental dentin posts Milled from human root dentin by using computer-aided design/computer-aided manufacturing. Methods; Seventy maxillary central incisors were obturated and divided into 4 groups: control group without any post (n = 10), carbon fiber post group (n = 20), glass fiber post group (n = 20), and dentin post group (n = 20), Control group teeth were prepared to a height of 5 mm, In all other teeth, post space Was prepared; a post was cemented, and a core build-up was provided. Half the privies from each group were statistically loaded until failure, and the remaining, half were subjected to cyclic loading, followed by monostatic load until fracture. Results: One-way analysis of variance and Bonferroni multiple comparisons revealed a significant difference among test groups. The control group demonstrated highest fracture-resistance (935.03 +/- 33.53 N), followed. by the-dentin post group, (793.12 +/- 33.69 N) glass fiber post group. (603.44 +/- 46.67 N), and carbon fiber post grow(497.19 +/- 19.27 N) under static loading. These values reduced to 786.69 +/- 29.64 N, 646.34 +/- 26.56 N, 470 +/- 36.34 N, and 379.71 +/- 13.95 N, respectively, after Cyclic loading. Conclusions: Results suggest that human dentin can serve as post material under static and fatigue loading. Although at an early stage, in research, the use of dentin posts in root-filled teeth looks promising. (J Endod 2013;39:96-100)