Dental Materials
Volume 14, Issue 6 , Pages 424-428, November 1998

The evaluation of resin composite consistency

  • Martin J Tyas

      Affiliations

    • School of Dental Science, University of Melbourne, AUSTRALIA
    • Corresponding Author InformationAddress correspondence and reprint requests to: Professor Martin J. Tyas, School of Dental Science, University of Melbourne, 711 Elizabeth Street, Melbourne 3000, Australia. Phone: +61-3-9341-0231; Fax: +61-3-9341-0437; E-mail: m.tyas@dent.unimelb.edu.au
    • ,
  • Derek W Jones

      Affiliations

    • Faculty of Dentistry, Dalhousie University, CANADA
    • ,
  • Amin S Rizkalla

      Affiliations

    • Faculty of Dentistry, Dalhousie University, CANADA

Received 25 August 1998; accepted 2 November 1998.

Abstract 

Objective. To evaluate a method for the assessment of the consistency of unset resin composite.

Methods. Fourteen commercial resin composites were selected, which had a range of consistencies as assessed subjectively. The material was placed in a cylindrical mold with 8mm diameter and 8mm depth, and a glass rod with 4.37mm diameter driven into the composite at 24.4mmmin−1 for 6s, i.e., to a depth of 2.44mm. The maximum force reached during the 6s period was recorded, and used as a measure of consistency.

Results. Consistency values ranged from 0.33N to 31.3N, with the highest values being found for some of the recently introduced `packable' materials. The reliability of the test was high.

Significance. The test may be useful as a standard method of assessing resin composite consistency.

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PII: S0300-5712(99)00017-2

Dental Materials
Volume 14, Issue 6 , Pages 424-428, November 1998

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