. Dental Fig. 38 Fl*. 39 Fig. 40 THE DENTAL SUMMARY 17 row of steps should now be made toward the wall. The lastrow of steps should be on the gold adjacent to the wall. Inthis way the gold is fairly wedged against the wall, and nomore malleting should be done on that piece of gold. If thegold is condensed next the wall first and in the center of thecavity afterward, it will be drawn away from the wall and aleaky filling result. Plugger points should not exceed in size one-half or five-eighths of a millimeter in diameter unless very thin pieces ofgold are used. Much better density is
. Dental Fig. 38 Fl*. 39 Fig. 40 THE DENTAL SUMMARY 17 row of steps should now be made toward the wall. The lastrow of steps should be on the gold adjacent to the wall. Inthis way the gold is fairly wedged against the wall, and nomore malleting should be done on that piece of gold. If thegold is condensed next the wall first and in the center of thecavity afterward, it will be drawn away from the wall and aleaky filling result. Plugger points should not exceed in size one-half or five-eighths of a millimeter in diameter unless very thin pieces ofgold are used. Much better density is obtained by using thickpieces of gold and small pluggers than by using thin pieces ofgold and large pluggers en account of the tendency of gold tobridge under large plugger points. A summary might be given as follows:. a- Fig. 41 Fie. 42 Restore the tooth or teeth to be operated on to their nor-mal position and/occlusion, making a normal interproximalspace and contact point. Remove all enamel rods not supported by dentin. Extend gingival margins under the gum and all othermargins to such smooth surfaces that they will be kept cleanby the excursions of food and the action of the lips, cheeks,tongue and tooth-brush. The cavo-surface angle should be beveled from one-fifthto two-thirds the thickness of the enamel. Make all resistance and retentive form so that the greatestretention is at the point of stress. The interior of all cavities should be made with flat seatsand square angles. Use non-cohesive foil in the gingival third of bicuspids 18 THE DENTAL SUMMARY and molars, and do not condense it over the ffineival marginuntil it is tied in with cohesive gold. Approach your margins with cohesive gold at least anangle of 90 degrees. Use short, thick pieces of gold where possible rather thanlong thin ones
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