Assessing Fracture Resistance of Restored Premolars with Novel Composite Materials: An In Vitro Study

Table 1

Study groups with different restoration types and their descriptions.

Group name	Group description	Filling procedure
Group A	Unprepared sound teeth (positive control)	None
Group B	Prepared with an extensive Class-II cavity (MOD) but left without any restoration (negative control)	None
Group C	Restored by the universal Tetric EvoCeram (Ivoclar Vivadent and Liechtenstein)	Incremental fill (conventional)
Group D	Restored by Beautifil restorative (Shofu, Japan)	Bulk fill
Group E	Restored by Filtek posterior restorative (3M ESPE, USA)	Bulk fill
Group F	Restored by SonicFill 2 (Kerr Corp., USA)	Bulk fill