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.
84/398 page 60
![Make a band wide enough only to give a good hold on the root, but not to extend beyond the margin of the gum to fit the root, and trim off even with the end of it. (See Fig. 89, d.) After Fig 87 fitting the band properly, remove it and -^^^ solder a piece of pure gold plate, say about ISTo. 34, on the outer end. (See Fig. 89, e.) This can be done quickly by placing the plate in the hand and pressing the band onto it with the thumb for a fit, then sol- dering in the flame of a Bunsen burner. Punch a small hole through the plate to take the pin in the crown, and replace in position on the root after trimming off the exposed edges. ISTow take a piece of thin pure gold, say ISTo. 34 or 36, with ears as shown in Fig. 90, f, punch a hole through it, slide it over the pin of the Logan crown, and burnish tightly to the base of the crown. (See Fig. 90.) ]Next warm the pin and place a sufficient quantity of Parr's fluxed Fig. 89. Fig. 90. wax around it as shown by dotted lines. Fig. 90. Replace the Logan crown on the root (with the cap in position), force home until the labial edges of root and crown meet, obtain the proper alignment, and cool and harden the wax by using a napkin with ice-water. Then remove the crown and cap together, held in proper relative position by the wax. (See Fig. 91.) Trim off the surplus wax and invest. (See Fig. 92.) Remove all the wax possible between the crown and the band, and flow 20-carat gold solder into the space. The wax which will necessarily remain,](https://iiif.wellcomecollection.org/image/b21223075_0084.jp2/full/800%2C/0/default.jpg)
