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Aust Dent J ; 20(3): 176-82, 1975 Jun.
Article in English | MEDLINE | ID: mdl-1057906

ABSTRACT

Four methods were compared for determining the setting rate of amalgams. The resultant order of preference as a standard method was compressive strength at 30 minutes after preparation of the specimen, the time to the last transverse cut on a cylindrical specimen with a "guillotine" blade and the time to nonfracture of a ball of a amalgam with a final set Gillmore needle. A mercury absorption method was unacceptable. Alloys labelled fast and standard setting could be separated and limits between fast and standard alloys have been examined for each method.


Subject(s)
Chemistry, Physical/methods , Dental Amalgam , Absorption , Hardness Tests , Mercury , Needles , Pressure , Stress, Mechanical , Time Factors
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