Journal of Dentistry
Volume 36, Issue 11 , Pages 873-877, November 2008

Fracture resistance of amalgam/glass-polyalkenoate open sandwich Class II restorations: An in vitro study☆

  • Howard W. Roberts

      Affiliations

    • USAF Dental Evaluation and Consultation Service, Great Lakes, IL, USA
    • ,
  • Kraig S. Vandewalle

      Affiliations

    • 59th Dental Wing, Lackland AFB, TX, USA
    • ,
  • David G. Charlton

      Affiliations

    • Naval Institute for Dental and Biomedical Research, Great Lakes, IL, USA
    • General Dynamics Information Technology, Frederick, MD, USA
    • Corresponding Author InformationCorresponding author at: Naval Institute for Dental and Biomedical Research, 310A “B” Street, Building 1-H, Great Lakes, IL 60088, USA. Tel.: +1 847 688 5647x121;fax: +1 847 688 4279.
    • ,
  • David W. Berzins

      Affiliations

    • Graduate Dental Biomaterials, Marquette University, Milwaukee, WI, USA

Received 22 April 2008; received in revised form 16 June 2008; accepted 7 July 2008.

Abstract 

Objective

To investigate the effect of two glass-polyalkenoate restorative materials used as root-dentin replacements on the fracture strength of Class II amalgam restorations.

Materials and methods

Class II slot preparations extending 2mm apical to the cemento-enamel junction were made in 30 teeth and randomly assigned to three groups. Group 1 (Control): restored entirely with amalgam (Tytin, Sybron Kerr, Orange, CA, USA). Group 2: The root-dentin area was restored with a viscous conventional glass-polyalkenoate restorative material (Fuji IX GP, GC America, Alsip, IL, USA), and the remainder of the preparation restored with amalgam. Group 3: The root-dentin area was restored with a resin-modified glass-polyalkenoate restorative material (Fuji II LC, GC America) and the remainder restored with amalgam. The amalgam restorations were loaded in compression to failure and the data analyzed using one-way ANOVA (α=0.05).

Results

No significant differences in fracture strength were found.

Conclusion

Root-dentin replacement with the tested glass-polyalkenoate materials did not affect the fracture strength of Class II amalgam restorations.

Keywords: Root caries, Glass polyalkenoate, Amalgam, Fracture strength, Open sandwich

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☆ Disclaimer: The use of materials and equipment in this manuscript does not represent and/or imply endorsement. The opinions expressed are those of the authors and do not represent the official opinions of the US Navy, the US Air Force, the US Department of Defense, or the US Government.

PII: S0300-5712(08)00207-8

doi:10.1016/j.jdent.2008.07.001

Journal of Dentistry
Volume 36, Issue 11 , Pages 873-877, November 2008

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