Principles and practice of operative dentistry . Custer electric gold Kerr electric gold annealer. Electric Annealing Tray.—The neatest and also the most satisfactorydevices for annealing gold are the electric annealing tray of Custer, shownin Fig. 394, and that of Kerr, shown in Fig. 395. By these devices any degree of heat that may be desired can be obtained,and with a uniformity not possible with any other device or method. CHAPTER XXI I. CONSIDEEATIONS IN FILLING SPECIAL CLASSES OF CAVITIES. Fig. 396. I. Simple Cavities upon Exposed Surfaces.—This class of cavities pres
Principles and practice of operative dentistry . Custer electric gold Kerr electric gold annealer. Electric Annealing Tray.—The neatest and also the most satisfactorydevices for annealing gold are the electric annealing tray of Custer, shownin Fig. 394, and that of Kerr, shown in Fig. 395. By these devices any degree of heat that may be desired can be obtained,and with a uniformity not possible with any other device or method. CHAPTER XXI I. CONSIDEEATIONS IN FILLING SPECIAL CLASSES OF CAVITIES. Fig. 396. I. Simple Cavities upon Exposed Surfaces.—This class of cavities presents the most simple forms of fillings in the whole range of operative procedures upon the teeth. Cavities which are situated upon the labial surfaces ofincisors and cuspids, especially when they have involved thecervix and extended beneath the margin of the gum, oftenpresent serious difficulties to the introduction of gold, whichtest the ingenuity, skill, and patience of the operator, as wellas the fortitude of the patient. One of the most formidable difficulties to be overcome i
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