title: Effect of mercury to alloy ratio on the hardness of low and high copper amalgams: a comparison with central and marginal regions.
mesh_terms: D003300:Copper; D003722:Dental Alloys; D003723:Dental Amalgam; D006244:Hardness; D008422:Materials Testing; D008628:Mercury; D013499:Surface Properties
chemical_list: D003722:Dental Alloys; D003300:Copper; D003723:Dental Amalgam; D008628:Mercury