Abstract
Abstract The purpose of this study was to compare the fracture resistance of teeth restored with bonded composite resin to teeth restored with glass ionomer cement. Extracted maxillary premolars prepared with MOD slots were restored with either a light-cured composite resin (P-30) bonded (with Scotchbond) to enamel and dentin or with glass ionomer cement (Ketac Fil) following manufacturers' directions. One group, left unrestored, served as the control. All of the teeth were loaded occlusally by a universal testing machine until fracture. The results suggest that teeth restored with bonded composite resin are significantly more resistant to fracture than teeth restored with glass ionomer cement (P=0.05). cohesive failures occurred frequently within the bulk of the glass ionomer cement. Failures with the bonded composites usually occurred within the bonding agent.
Published Version
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