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J Dent Res 51(2): 519-525, 1972
© 1972 International and American Associations for Dental Research
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Shot Impact Test for Dental Amalgam

LAWRENCE GETTLEMAN 1, RICHARD L. WEBBER 1, WALTER R. POTTER 1, and JOSEPH P. MOFFA 1

1 Materials and Technology Branch, Dental Health Center, Division of Dental Health, Bureau of Health Manpower Education, National Institutes of Health, Public Health Service, US Department of Health, Education and Welfare, San Francisco, California 94118, USA

Simulated amalgam restorations were tested destructively by means of oscillating shot impact, which produced fracture of the margins over time. Breakdown was related to the amalgam's composition and structure, it occurred on an all or none basis, and it was measurable subjectively. The test will be used to correlate laboratory and clinical evaluations of restorative materials.

Submitted on January 21, 1971






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