Fracture resistance of premolars with bonded amalgam restorations


The aim of this in vitro study is to evaluate the fracture resistance of premolars with three surface amalgam restorations. Fifty premolars were used, and divided into five groups. The teeth in group one remains intact whereas the teeth in the second group prepared and not restored. The teeth in the third group prepared and restored with amalgam only. In groups four and five, the amalgam restorations were lined with All–Bond 2 and Scotchbond Multi Purpose Plus respectively. After thermocycling, the teeth were tested under universal compression machine at a crosshead speed 5 mm/minute. Data were analyzed using one way Analysis of Variance and Duncan’s Multiple Range Test. The results of this study indicates that both Scotchbond Multi Purpose Plus and All–Bond 2 increase the fracture resistance as compared to the control groups (groups two and three). The results of this study also show no significant difference between the two bonding agents regarding teeth fracture resistance.