A comparative evaluation of the fracture resistance of direct composite veneers using different restorative materials - an in vitro study

Aim: The aim of this study was to evaluate the fracture resistance of direct composite veneers using different restorative materials. Setting and design: This was an in vitro study. Materials and Methods: A total of 120 Maxillary central incisor’s were selected and divided into four groups of 30 each. According to the restorative material used-Group A-Nanohybrid composite (Tetric n Ceram), Group B Microhybrid composite (Filtex Z 250), Group C- Nanohybrid composite( Ceram X Spheretec) , Group D-Submicron-hybrid (CHARISMAR smart). The tooth preparation selected for the study was window preparation. All specimen were mounted in an acrylic block embedded 2 mm apical to the CEJ. Compressive load was applied at an angle of 45 degree at the facial part of veneer using a universal testing machine. Results: The results of this study showed that Ceram X Spheretec (Nanohybrid composite) showed the highest fracture resistance score followed by Tetric N Ceram (Nanohybrid composite) and Charisma® Smart (submicron hybrid composite). While the specimen restored with Filtex Z 250 (Microhybrid composite) showed least resistance to fracture. Statistically analysis of fracture resistance showed a significant difference between the groups. Conclusion: It was concluded from the study that Ceram X Spheretec showed the highest fracture resistance amongst all the groups. Thus it was a favourable material for direct composite veneers on anterior tooth in comparison to Tetric N Ceram, Filtex Z 250 and Charisma® Smart.