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Volume 8 Issue 5 (May, 2020)

Original Articles

Evaluation and comparison of fracture resistance of two low-viscosity bulk-fill resin-based restorative materials
Sachin Chadgal, Riyaz Farooq, Aamir Rashid Purra, Fayaz Ahmad Ahanger

Objectives: This study tested the fracture resistance of two different bulk-fill composite restorations and compared them to a conventional composite. Methods and Materials: Flowable and high viscosity bulk-fill composites (SDR, SonicFill) and a nanohybrid resin composite (Filtek Z350 XT) were used. Standardized class II cavities were prepared on extracted premolars,and different restoration protocols were used. In protocol 1 (control), restoration was applied using a layering technique; in protocol 2 (SDR), restoration was applied in bulk with a capping layer; in protocol 3 (SonicFill), restoration was applied in bulk without a capping layer. After thermocycling, the restorations were subjected to the fracture resistance test using a universal testing machine. Results: Statistical analysis was carried out using one-way ANOVA at a significance level of α = 0.05. Fracture resistance of premolars restored with SDR (68.95), SonicFill (70.61) and Filtek Z350 XT (67.55) did not show significant difference (p = 0.72). Adhesive failures were more often observed in all the groups. Conclusion: The new low-viscosity bulk-fill composite restorations seem to have adequate fracture resistance. Key words: SDR, SonicFill, Bulkfill, fracture resistance

 
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