. A manual of mechanical dentistry and metallurgy . ecured inthe usual way and the plaster cast with the metal plate inposition should be secured in an articulator. We now^ pro-ceed as for ordinary gold work, the teeth are ground andjointed (if block or gum teeth are used), and held tem-porarily in position with a little wax upon the labial mark with a sharp-pointed instrument on the palatinesurface of the plate each point \vhere it is desirable to solder ii6 MECHANICAL DENTISTRY AND METALLURGY. a pin or loop, which should he as near the hase of the teethas possible, then remove t
. A manual of mechanical dentistry and metallurgy . ecured inthe usual way and the plaster cast with the metal plate inposition should be secured in an articulator. We now^ pro-ceed as for ordinary gold work, the teeth are ground andjointed (if block or gum teeth are used), and held tem-porarily in position with a little wax upon the labial mark with a sharp-pointed instrument on the palatinesurface of the plate each point \vhere it is desirable to solder ii6 MECHANICAL DENTISTRY AND METALLURGY. a pin or loop, which should he as near the hase of the teethas possible, then remove the teeth and wax. Now solderat the points indicated either short platinum pins or loopsformed of small platinum wire or strips of plate, soldering,of course, with a lower carat than that used in the plate;bend or flatten the loops as desired; clean plate thoroughlyin the acid bath, and polish that portion to be exposed toview. Return the plate to the cast and see that it fits accu-rately; rearrange the teeth according to the articulation; Fig. wax up so as to entirely cover the pins or loops,—in fact,the pins should be so placed that when the palatine surfaceof the rubber is properly shaped they will not be exposedin the least. The case is now ready to be flasked, vulcan-ized, and finished up as usual. The principle is illustratedin Fig. 67. Another method of increasing the attachment l^etweenthe metallic base and the rubber, is that of spurring the plateover the ridge with a sharp-pointed chisel, as shown inFig. 68. When aluminum is employed as the base, the strongestand altogether the best means of increasing the attachmentis that of cutting or punching loops from the plate itself. METALLIC BASE WITH RUBBER ATTACHMENT. 11/ I^iG. 68. Fig. 69.
Size: 1765px × 1416px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidman, booksubjectmetallurgy
