File:Removable bridge;The Dental cosmos (1907).jpg

Identifier: dentalcosmos4919whit (find matches)
Title: The Dental cosmos
Year: 1907 (1900s)
Authors: White, J. D McQuillen, J. H. (John Hugh), 1826-1879 Ziegler, George Jacob, 1821-1895 White, James William, 1826-1891 Kirk, Edward C. (Edward Cameron), 1856-1933 Anthony, L. Pierce (Lovick Pierce), b. 1877
Subjects: Dentistry Dentistry
Publisher: Philadelphia, S. S. White Dental Manufacturing Co
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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n of any other crown or metallicwork to either of the preceding forms. The methods of work do not differmuch from those now employed, but ofcourse certain variations are necessary. must be used, owing to the fact that thebridge remains on the cast during thesoldering. Thirdly, the crowns must be fitted withcap backings as previously described(Fig. 6), except that the soldering is notdone until the whole bridge is readv.When thus soldered, the ordinary backingwith the facings, becomes continuous withthe cap backings with their pins, whilethe latter are firmly united to the hollowpin crowns. The bridge is now soldered BEST.—A SYSTEM OF CROWNING AND BRIDGING, ETC. 1249 in the usual manner. The result will be, ing, as described in the first part of this when set, a permanent bridge with porce- paper; and second, by preventing the lain abutments. (Fig. 7.) flowing of the solder across the inter- If, however, certain conditions are ob- proximal spaces of the crowns and fa- Fig. 8. Fig. 9.
Text Appearing After Image:
Fig. 8: Parts of removable bridge, a, Hollow posts. 6; Ordinary facings and specialcrowns, c, Continuous backing. Fig. 9: Assembling of removable parts, a, Special crowns with hollow posts, h. Ordi-nary facings and backings, and cap backings with pins, c, Completed bridge. served, the second or removable type of cings, as otherwise it would not only con-bridge is obtained. (Figs. 8 and 9.) stitute an esthetic fault, but in additionThis is formed by, first, preventing ad- would form wedges, preventing the with-hesion of the cap backings when solder- drawal of the bridge. It will be observed 1250 THE DENTAL COSMOS. that while this style of bridge has beentermed removable, it is not so, strictlyspeaking, since only the backing (capbackings with pins and ordinary backingwith facings) can be withdrawn from thecrowns. Bridges thus made may be soaccurately fitted that no cement at allwould be necessary to hold them in placeduring the time needed to treat diseasedroots. The third group of bri

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