. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . g out its fullcohesive property will be the result. Gold Pluggers.—Gold pluggers are made with numerousserrations in their face, these serrations being of a wedge orpyramidal shape. A set of gold pluggers should possessserrations of the same size in each instrument, in order thatwhen change of instruments is made during the gold-buildingoperation, the pyramids may properly interdigitate (see , 89 and 90). In case instruments with different size ser-rations are used, when a change t
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . g out its fullcohesive property will be the result. Gold Pluggers.—Gold pluggers are made with numerousserrations in their face, these serrations being of a wedge orpyramidal shape. A set of gold pluggers should possessserrations of the same size in each instrument, in order thatwhen change of instruments is made during the gold-buildingoperation, the pyramids may properly interdigitate (see , 89 and 90). In case instruments with different size ser-rations are used, when a change to a new instrument ismade, the surface of the gold should be gone over with thenew instrument before adding a fresh piece of gold. There are three principal methods of plugging cohesivegold: 1. By means of hand pressure. 2. By the use of the hand mallet. 3. With some form of mechanical mallet. For starting fillings, hand pressure alone should be used,while for building the main body of the fiUing, either the handmallet or some form of mechanical mallet is utilized. For MANIPULATING COHESIVE GOLD 153. Fig. 187. Fig. Fig. 187.—Series of illustrations showinK the steps in filling a gingival thirdcavity on an incisor with cohesive gold. The cavity form is more clearly illustratedin Fig. 141, a box-shaped cavity with four definite point angles. First, fill two ofthe point angles. Fig. 1S8.—Then build gold along the connecting line angle, uniting that firstplaced in the two convenience angles.
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