Marginal failure of amalgam. Effect of alloy selection and bite forces.
Four amalgam alloys were used in a two and a half year study. 163 class II restorations were made and the marginal breakdown was studied. The biting forces of the patients were estimated and divided in three groups. The result indicated that the conventional amalgam showed more breakdowns than the high copper amalgams. Among these a dispersed and a ternary amalgam had least marginal failures. The amount of defects tended to be correlated to the biting force for the conventional and the dispersed amalgam.
D000328:Adult; D003722:Dental Alloys; D003723:Dental Amalgam; D003737:Dental Cavity Preparation / Q000379:methods*; D003766:Dental Occlusion; D003793:Dental Restoration, Permanent; D003799:Dental Stress Analysis; D005069:Evaluation Studies as Topic; D006801:Humans; D008875:Middle Aged; D013499:Surface Properties
D003722:Dental Alloys; D003723:Dental Amalgam