A Practical treatise on artificial crown- and bridge-work, and porcelain dental art / by George Evans.
- George Evans
- Date:
- 1900
Licence: Public Domain Mark
Credit: A Practical treatise on artificial crown- and bridge-work, and porcelain dental art / by George Evans. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
99/398 page 75
![num outside of the collar. Used in that manner it will not flow over the inside of the collar and interfere with the fit of the cap. The process is facilitated by first merely attaching the platinum, with the solder, to the edge of the collar, then readapting, and finishing the soldering. The platinum is next trimmed to the collar, and the cap adjusted on the root. The labial section of the surface of the cap is then burnished to the end of the root (A, Fig. 116). The root-canal having been slightly enlarged, a pin of round iridio-platinum wire, ]S[o. 16 or 17, U. S. standard gauge,—filed a little smaller for laterals or other roots which require it,—is slightly tapered at the point, fitted to an aperture made in the cap, and to the canal (B). The pin is then cut off even with the cap, removed, and temporarily laid aside. Fig. 116. Fig. 117. Fig. 118. Fig. 119. A hollow wire, the open space in the center of which is very small, affords the advantage that it can be drilled out of the canal in a comparatively easy manner if for any reason it be- comes necessary to remove the crown, as the drill will follow the fine opening in the center of the wire. To accurately fit a post in a root-canal which for some reason has been reamed considerably, use a piece of platinum wire of a gauge which will fit the end of the canal. Twist a narrow strip of platinum foil on the post from the point downward, and fit post and platinum to the canal. Remove post and platinum foil together and solder them with a pellet or two of gold foil by hold- ing in a Bunsen flame. A plain-plate cross-pin tooth, suitable in form and color, is ground and fitted in position on the cap. The labio-cervical edge of the porcelain (A, Fig. 118) should be flush with the edge of](https://iiif.wellcomecollection.org/image/b21223075_0099.jp2/full/800%2C/0/default.jpg)
