title: A photoelastic study of stress concentrations produced by retention pins in amalgam restorations.
abstract: Photoelastic models of pin-amalgam restorations were constructed to simulate different pin-dentin-amalgam relationships. The stress-raising effect of a pin is influenced by the axial stiffness of the pin and its capability of bonding with the amalgam. The stress produced by a very stiff non-bonded pin could cause failure of the restoration.
mesh_terms: D000535:Aluminum; D003723:Dental Amalgam; D001840:Dental Bonding; D003772:Dental Pins; D003793:Dental Restoration, Permanent; D003799:Dental Stress Analysis; D004548:Elasticity; D006801:Humans; D008953:Models, Anatomic; D008954:Models, Biological; D012117:Resins, Synthetic; D013193:Stainless Steel
chemical_list: D012117:Resins, Synthetic; D013193:Stainless Steel; D003723:Dental Amalgam; D000535:Aluminum