Abstract: Aim: Aim of this in vitro study was to compare cusp fracture resistance of root filled maxillary premolars restored with different composite resins using single step self etch and two step (etch & rinse) techniques after MOD preparations.
Materials and Methods: 80 premolars with no restorations or cracks were selected. MOD cavities were prepared considering the buccolingual width to be equal to half of the intercuspal distance. The specimens were randomly divided into 8 groups, 10 specimens each: Group I did not receive cavity preparation or root canal treatment, group II remain unrestored after MOD cavity preparation. In group III, Xeno III was applied and then restoration was done with packable resin. Group IV were restored with packable resin after total-etched and Prime and Bond NT application.....
Keywords :Fracture resistance; Xeno III; ormocer resin
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