Abstract
Utilization of composite restorations in high stress areas requires a re-evaluation of this factor in relationship to marginal integrity. Sixty Class V cavity preparations were prepared in the buccal surfaces of premolars and restored by conventional methods using a bonding agent and large particle composite resin. These restorations were subjected to repetitive mechanical loading with and without thermal cycling. The effect on the composite-enamel bond was evaluated by autoradiography. The induced stresses resulted in no statistical change in the marginal integrity of the restorations.
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