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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 Excerpt: ...or gold of suitable size is prepared and pressed into shape upon the palatine and palato-proximal face of the tooth; little slits may be cut in the collar with a delicate pair of scissors, to make easier this adaptation; care should be taken not to push the collar up under the gum at any point, provided the palatine wall of the tooth, which had been allowed to remain standing is at all ample in height--say one-tenth of an inch; if less than this the collar may pass under the gum for a short distance, as will be shown subsequently. In the average case this collar will not quite one-half encircle the tooth. Fig. 172 shows the collar curved to the outline of the gummargin and shaped to the contour of the palato-proximal wall of the tooth. At G are the slits cut in the platinum to allow overlapping in shaping to contour. "In order to strengthen the collar and facilitate its attachment to the base-plate, cut a series of slits in that portion of the base-plate which has been made to project beyond the palatine wall of the tooth, and the base-plate, with its now attached pin, being placed with the collar in position in and upon the tooth, the little strips of metal into which the overhanging edge of the base-plate has been cut are pressed, one after the other, down upon the collar, and carefully moulded to its surface, so that the collar will no longer consist of a single thickness of metal, but will be reinforced by these additional thicknesses of base-plate thus pressed upon it. "Fig. 173 shows this quite perfectly: H is the free end of the retaining pin which is to be cut off when the porcelain tooth is mounted. I is the base-plate, with its overhanging palatine margin cut into strips, J, which are being pressed down upon the collar, F, by the broad-s...
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