The production of a stable, long term bond to tooth substance is an ideal requirement for the success of all restorations, both metallic and non metalic.The magnitude of this bond must be sufficient to withstand the stresses caused by the polymerization contraction of resin-based materials,generally considered to be about 17Mpa in low-configuration factor restoration (those in which ratio of bonded to non-bonded surfaces is one or less than one), and steps must be taken to prevent these stresses from compromising the restoration.The strength of the bond should also be enough to retain restorations in non-invasive , non retentive cavity preparations which may preserve tooth substance and minimize the potential for pulpal damage during cavity preparation.....to read more please download
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