. The Dental cosmos. geal first. As the inlay began to congealit would shrink and exerl tension uponthe partly congealed gold sprue, which,being held rigid, would not give; hence;it would break directly at the this I deduced thai the sharp mar-gins of the gold inlay would congeal first,hut. not being held rigid, they would hepulled en masse toward the bulk of thesoldi as it. shrank. Prom this we learn the distortion produced by uneven shrink-age. At any rate, this trouble can soeasily be overcome by a little lap of goldthat it is only of scientific interest. EXPLANATION or MODELS. F
. The Dental cosmos. geal first. As the inlay began to congealit would shrink and exerl tension uponthe partly congealed gold sprue, which,being held rigid, would not give; hence;it would break directly at the this I deduced thai the sharp mar-gins of the gold inlay would congeal first,hut. not being held rigid, they would hepulled en masse toward the bulk of thesoldi as it. shrank. Prom this we learn the distortion produced by uneven shrink-age. At any rate, this trouble can soeasily be overcome by a little lap of goldthat it is only of scientific interest. EXPLANATION or MODELS. Fig. H) shows a bicuspid with a mesio-occluso-distal cavity, faulty at the gingi-va] and pulpal walls. The gingival wall MEYER.—SHRINKAGE IN ( AST GOLD [NLAYS. has no hovel, and the pulpal wall is soshallow that, when the inlay is drivendown, it Hares out at the gingival margins(see Fig. 14). Fig. 11 shows an upper molar with astep cavity, also faulty at the gingivalwall. The models shown in Figs. 10 and1 1 were mad
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentist, bookyear1912
