A treatise on the use of A.J. Watts' crystal gold / by W.H. Dwinelle.

  • Dwinelle, W. H.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the use of A.J. Watts' crystal gold / by W.H. Dwinelle. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    a round piece of plate, about one-half the diameter of the breadth of the lining; this is perforated with a hole; for the reception of a screw. The convergent angle of this fixture is now placed, base downwards, and on the same plane with the bottom of the lining, against the backing of the tooth, perpendicular with its central line, and soldered there. A FIG. m section of the fixture thus formed is represented by Fig. M. This is now placed upon the root to which it is to be attached ; guiding it to the exact position it is to occupy, a drill is passed through the eye of the linim>; at the bottom, into the substance of the tooth a sufficient distance to firmly hold the screw that shall take its place. Another hole of the same size is drilled into the root near its lingual border ; a screw is cut within both of these, and a FIG. x. substantial golden screw fitted to each. Fig. N represents the relation of the fixture to the prepared root prior to the opera- tion, though the screws are too small. We arc now prepared for the operation. All parts have been made thoroughly dry ; gold Nos. 2, 3, and 1, A, cut into appropriate pellets, is before us. The lingual screw is firmly established in its place, when the gold is packed around its projecting head as directed on page 10, until it is enveloped by a broad cone of solid metal. One or two uniform thin layers of gold No. 2, A, covering the whole base of the root, are now partly consolidated to their place. The covered buccal drill-hole is now freely opened, when the prepared cusp is fixed to its position^ and forcibly established there with the remaining golden screw, which, if thoroughly done, will render it sufficiently consolidated to justify us in proceeding. Gold is now freely carried to its place and condensed there, as described on page ]<>. As it accumulates, a portion of each successive .stratum of gold lays hold on the diverging wings of the lining, and continually bind- ing and enveloping it into its solid texture, it ultimately embraces and overcaps the whole. .V column of gold rising up out of the nerve cav- ity, may often be appropriated in these cases, as also the undercut fig. sx method illustrated by Fig. II, page ]b. _ A better form of lin- ing since adopted, is represented in section by Fig. Nx; Another method is to line a tooth in the manner represented by Fig. N without the diverging wing, and then solder a band of gold around it, so that it will correspond to the presenting outline of the root to be covered. Fig < > represents a sectional and Fig. FIG. 0. FIG. P. P a perspective view of this fixture. The manner of establishing it in its place, is essentially the same as already described in connection with Fig. N. This method of operating combines great facility with neatness of execution, and is generally adopted in preference to all other methods for this purpose. A gentleman of my acquaintance has, for several months past, worn an artificial cusp and crown of this general character, upon a root which contains undisturbed its living and healthy nerve. By accident the natural crown was broken off, but in such a manner as to leave a large portion of the central part of it covering the nerve, and which protruded down so far, that,by cutting a groove around it< base, it somewhat resembled an inverted cone ; gold was packed around this until it nearly reached the outline of the root, when the prepared cusp and crown Fig. P, without its staple or screws,
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