Principles and practice of operative dentistry . Ainsworths rubber-dam punch. tapering instrument,—the reverse end of a mallet-plugger will answer thepurpose,—and nicking the rubber near the point with a sharp knife ; theresult is a perfectly round hole. Any desired size may thus be obtained; 212 OPEEATITE DEXTISTEY. the lower down upon the instrument the nick is made the larger the hole ;the tighter the dam is drawn the smaller the hole will be. The wTiter has used this method many years, to the exclusion of allothers, and with perfect satisfaction. Fig. 308 shows the relative size of holes a
Principles and practice of operative dentistry . Ainsworths rubber-dam punch. tapering instrument,—the reverse end of a mallet-plugger will answer thepurpose,—and nicking the rubber near the point with a sharp knife ; theresult is a perfectly round hole. Any desired size may thus be obtained; 212 OPEEATITE DEXTISTEY. the lower down upon the instrument the nick is made the larger the hole ;the tighter the dam is drawn the smaller the hole will be. The wTiter has used this method many years, to the exclusion of allothers, and with perfect satisfaction. Fig. 308 shows the relative size of holes adapted to (1) incisors andcuspids, (2) bicuspids, (3) molars. The depressed rubber dam (Fig. 309) Fro. 308. Fig.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
