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Effect of retention grooves on fracture strength of Class 2 composite resin and amalgam restorations
Journal article   Peer reviewed

Effect of retention grooves on fracture strength of Class 2 composite resin and amalgam restorations

D J Caplan, G E Denehy and J W Reinhardt
Operative dentistry, Vol.15(2), pp.48-52
03/1990
PMID: 2374744

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Abstract

The effect of approximal retention grooves on fracture strengths of class 2 composite resin and amalgam restorations was tested in vitro. Results indicated that retention grooves significantly improved (P less than 0.05) the compressive strength of amalgam restorations (38.6% stronger). For posterior composite resin restorations, there was no significant difference in mean compressive strength of restorations in preparations with and without retention grooves.
Composite Resins Dental Cavity Preparation - methods Dental Amalgam Humans

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