Objectives: The study aimed to determine the fracture resistance of fiber posts luted at three different lengths in the root canal. Methods: The anatomic crowns of 30 premolars were cut at the CEJ. The teeth were endodontically treated and divided into 3 groups (n=10) according to the depth in which the post [(ENDO LIGHT post #09 (RTD)] was luted: 1. Five mm; 2. Seven mm; 3. Nine mm. The free post length was standardized at 4.8 mm. The post cementation was performed with Fluorocore2 (Dentsply DeTrey) and its adhesive [XP Bond (Dentsply)]. After 24 h, the posts were stressed to fracture under compression on the outer end (45°, crosshead speed: 0.75 mm/min). Data were statistically analysed with One Way ANOVA (p<0.05). Results: Mean strength values (N) and SD are shown in the table. Cementation length did not affect fracture resistance of fiber posts. Conclusions: Over preparation of the post-space should be avoided as varying post length has no significant effect on the fracture resistance of dowels.
Post Length | Mean (SD) | N° specimens |
5 mm | 40.52(3.14) | 10 |
7 mm | 41.68(5.31) | 10 |
9 mm | 44.88(6.77) | 10 |