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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    to suit the character of the cavitj to be filled, place the napkin around the tooth—some use bibulous paper for this purpose with great success. Then, with the coils of paper, thoroughly dry the cavity. Now, with instruments J, 2, 3 or f, according to the nature of the presentation of the cavity, press slightly upon one of the blocks or pellets, which causes it to adhere : then cany it carefully to its place, fix it in its position, modeling and pressing it to all the inequalities of the cavity, by changing the presentations of the instrument used ; then with various sized instruments, of tlie character of Nos. 10, lOx, I 1 and 12, go over the entire surface to ensure it- complete consolidation; or add another layer, before proceeding to condense with the smaller in- struments, and thus continue to add layer upon layer, following between each with the smaller instruments, even with ultimate points and blades, according to the necessity of the case, until the cavity is lull ; by which means, a uniform consolidation is ensured throughout tin entire sub- stance of the stopping. Though not so plastic as day, the operator will often be reminded of that material, in the use of Crystal Cold, from, the ease with which fragments of it are taken up by the tools, and the readiness with which it is made to adhere to, and be resolved into, the texture of the gold that has preceded it. Now pass over the entire surface, with a condenser of the general character of No. 25, which, although it makes but little impression upon the already condensed old, ensures an absolute uniformity of surface. Then trim down with a file, or burr headed cutters, followed by Scotch stone, clear the surface with iinely pulverized pumice stone ; then follow with fine crocus upon a pine or cedar stick, and burnish. The result will be a stopping of absolute integrity, of unparalleled density, which will never change in the mouth can never be removed, except by being cut or drilled 'out, ami whose surface will remain bright and unbroken, more completely so than would pure casl gold, under the same circumstances. Large cavities in the lower molar teeth, come next in order These operations are generally surrounded by more difficulties, chiefly in con- sequence ol the cavity of the mouth, retaining the flow of the saliva from the superior and mferior maxillary glands, and retaining it in such dose proximity to the teeth, to be treated. During a lengthy opcra- tmn napkins will have to he repeatedly changed, and the laliva pump or some similar instrument, will come into constant requisition It is a large molar cavity, nearly all the bony part of the crown gone leaving only its walls, which are sound and healthy \o r t;!lrA No- 2rldtur thiscase'i( *********—*»« than virion' £ TV?* lt ^^ raPid1*- We CUt k int0 *>l0Cks of wioftssizes and thickness, compress some of the larger ol' these, so that their original thickness is reduced one half; these we shall use' to make the first layer, to facilitate the operation and ensure u against breaking through the thin plate of bono that lie's between the bottom of he cavity and the living nerve beneath. With instrument So ] we p£eup withV : (; i:dr conde*y? pe!Jete' carryh f-'a»d fi**tS p ace >\ th Nos 4 and .,, we model and condense it into all the ine- quality; then follow it with such fine instruments of the shape of No 9 and 10 as circumstances shall require, taking especial caro' , « good ,«n^-always being assured that the centre never suffers from over attent on to the circumference-using as much pressure as the todfc wS bear, to ensure the perfect integration of the gold. Anothe an 1S