. A manual of mechanical dentistry and metallurgy . Imitating this worn or abraded condition gives the artistfurther opportunity to display his skill. After selectingteeth that meet the recjuirements as nearly as possible in4 42 MECHANICAL DENTISTRY AND METALLURGY. size and color, it is possible, as has been suggested, to sochange them by judicious grinding as to give a more har-monious expression to the mouth. This may be accom-plished with either plain or gum teeth, but more thoroughlywhere plain teeth are admissible, that is, where the lip islong enough to conceal the rubber above them. Or,
. A manual of mechanical dentistry and metallurgy . Imitating this worn or abraded condition gives the artistfurther opportunity to display his skill. After selectingteeth that meet the recjuirements as nearly as possible in4 42 MECHANICAL DENTISTRY AND METALLURGY. size and color, it is possible, as has been suggested, to sochange them by judicious grinding as to give a more har-monious expression to the mouth. This may be accom-plished with either plain or gum teeth, but more thoroughlywhere plain teeth are admissible, that is, where the lip islong enough to conceal the rubber above them. Or, a verynatural appearance may be given by securing the teeth atthe depots before they are baked, and carve and stain themaccording to the requirements of the case in hand. Fig 19. Many other points in enhancing the appearance of arti-ficial teeth will suggest themselves from time to time tothe thoughtful student. The accompanying illustrations,Figs. 15 to 19, inclusive, are given as typical studies. Jointing Gum or Block Teeth.—By the judicious grind-ing of the joints in gum teeth, whether single or arrangedin sectional blocks, the proper shape and contour may begiven to the denture. But these teeth are not susceptibleto as natural and artistic arrangement as the plain latter, however, can only be employed where the teethare to rest directly upon the natural gums as shown in SELECTION AND ARRANGEMENT OF TKETII. 43 Fig. 19, or where the hps are of suificient length to entirelyconceal the gums. When gum teeth are used every care should he taken toso grind the joints that their surfaces will come in perfectcontact, and not, as is so commonly practiced, make\^-shaped spaces. As each block is thus ground, it shouldbe secured to the trial plate, and so on
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Keywords: ., bookcentury1900, bookdecade1900, bookidman, booksubjectmetallurgy
