Abstract
Purpose: The aim of this study was to assess and compare the fracture resistance of. onlays fabricated using 3D printed composite material(Next Dent C&B) and hybrid ceramic(Vita Enamic ) material for upper premolar dental restorations.
Materials and Methods: Forty onlay specimens were fabricated, with 20 onlays made from 3D printed composite resin and 20 from hybrid ceramic (Vita Enamic) material. All specimens were prepared with standardized dimensions and subjected to fracture resistance test using a universal testing machine. Applied load at fracture point was recorded for each specimen to assess material performance.
Results: The results showed that hybrid ceramic(Vita Enamic ) onlays exhibited a greater average fracture resistance than 3D printed composite (Next Dent C&B)onlays. However, statistical analysis revealed that the difference in fracture resistance between the two materials was not significant (p > 0.05).
Conclusion: Both 3D printed composite and hybrid ceramic(Vita Enamic) materials demonstrated comparable fracture resistance in the context of upper premolar onlay restorations. Vita Enamic demonstrated a higher average fracture resistance, but no significant statistical difference was observed between the materials