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1 Department of Dental Materials, Indiana University School of Dentistry, Indianapolis, Ind.
A study was made to determine the final mercury content at the margins and in the body of amalgam restorations when condensed with various instruments. Two different procedures, in terms of the mercury present in the individual increments, were used.
Regardless of the method of condensation or the dryness of the increments used to build the restoration, the marginal area of the amalgam restoration contained a higher per cent of mercury than did the bulk of the restoration. The residual mercury was slightly higher when the increasing dryness technic was employed.
Submitted on May 18, 1956
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