Manual of dental surgery and pathology . F\<r. Powers mallet, which isattached to and worked bythe dental engine. Kirbys pneumatic luallet. 208 MANUAL OF DENTAL SURGERY AND PATHOLOGY, Fig. 203. Three forms of bit to be employedwith Powers engine mallet. other, across and back again, gradual]\ covering the surface ofthe cavity, tlie centre first and the margins afterwards. Thisshould not be done too quickly, as there is a tendency in the gold to curl away from the surfaceif the mass be too thin: a carefulguard should therefore be kept, thatthe plug in its earl} stages is suffi-ciently
Manual of dental surgery and pathology . F\<r. Powers mallet, which isattached to and worked bythe dental engine. Kirbys pneumatic luallet. 208 MANUAL OF DENTAL SURGERY AND PATHOLOGY, Fig. 203. Three forms of bit to be employedwith Powers engine mallet. other, across and back again, gradual]\ covering the surface ofthe cavity, tlie centre first and the margins afterwards. Thisshould not be done too quickly, as there is a tendency in the gold to curl away from the surfaceif the mass be too thin: a carefulguard should therefore be kept, thatthe plug in its earl} stages is suffi-ciently strong in its centre to preventthis. We now proceed to mass onthe pellets, using larger ones as theplug becomes stronger, until the goldstands fairly above and over all theedges of the cavity, when it is filedor cut down with corundum wheelsin the engine (Fig. 204) to the con-tour of the face of the tooth, andsmoothed off with Arkansas stone,so that a pointed instrument can be passed from the gold to theenamel, and vice versa, without there being any
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdentist, bookyear1882
