Effect of anti-rotation devices on biomechanical behaviour of teeth restored with cast post-and-cores.

摘要: Raposo LHA, Silva GR, Santos-Filho PCF, Soares PV, PBF, Simamoto-Junior PC, Fernandes-Neto AJ, CJ. Effect of anti-rotation devices on biomechanical behaviour teeth restored with cast post-and-cores. International Endodontic Journal. Abstract Aim  To test the hypothesis that presence an device (ARD) and its location can influence root filled post-and-cores metallic crowns. Methodology  Fifth two bovine incisor roots were selected divided into four groups (n = 13): Nd- without ARD; Bd- buccal Ld- lingual BLd- ARD. The specimens crowns. After a fatigue process (3 × 105 50 N), three strain gauges attached buccal, proximal surfaces samples each group (n = 3) submitted to 0–100 N load. Fracture resistance was assessed in mechanical testing machine (n = 10). Strain values fracture data analysed by one-way anova Tukey Honestly Significant Difference (HSD) (α = 0.05). failure mode then evaluated under optical stereomicroscope. Bidimensional models generated for finite element analysis (FEA) using von Mises criteria. Results  No significant difference modes occurred between groups. BLd had higher stress concentrations dentine surfaces. Conclusions  did not significantly mode. However, stress–strain increased when prepared faces concomitantly.