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  • Title: A photoelastic study of stress concentrations produced by retention pins in amalgam restorations.
    Author: Dhuru VB, McLachlan K, Kasloff Z.
    Journal: J Dent Res; 1979 Mar; 58(3):1060-4. PubMed ID: 370168.
    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.
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