The American text-book of prosthetic dentistry : in contributions by eminent authorities / edited by Charles J. Essig.

  • Essig, Charles J. (Charles James), 1841-1901.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: The American text-book of prosthetic dentistry : in contributions by eminent authorities / edited by Charles J. Essig. 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.

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    standard of results, and, unless kept carefully within the precincts assigned it, cause the laboratory to become a most unattractive place. It is of importance, therefore, that a suitable table be provided upon which the casting and subsequent trimming of plaster models and other parts of the laboratory work depending upon the employment of plaster may be performed. The plaster-table should also be supplied with a sink and receptacle for the cuttings and refuse fragments. The accom- panying diagram shows such a table and sink which the author has found to be practical and convenient. It has been designed especially to protect the floor and other parts of the laboratory from contact with plaster. It is 31 inches high, 23 inches wide, and 27 inches long, and has an opening (A) 8 inches by 8 inches square, under which rests a Fig. 6. Fig. 7. portable box (C), 12 by 12 inches square, intended to receive all cuttings and refuse plaster. The table is provided with a small rest (B) for convenience in resting the model while trimming to proper dimensions. It is also provided with a drawer for the reception of plaster knives, spatulas, and camel's- hair brushes used in mixing plaster and in casting and trimming models. The accessories of the plaster-table, named in the order in which they are used, consist, first, of two short broad-necked bottles, for sandarac and shellac varnish, two or more flexible rubber plaster bowls, the same number of bone, ivory, or steel spatulas for mixing, one or more plaster knives, such as are sold at the dental depots for the purpose of reducing the size of plaster models, or a bench-knife, as shown in Figs. 7, 8, will be found very effective in cutting down hard plaster in preparing the model for flasking in rubber or celluloid work, and a number of different sizes of camel's-hair brushes, which are indispensable in carrying the plaster into the deeper parts when running or casting impressions for partial dentures, and indeed all impressions having deep and more or less inaccessible points, which might not be perfectly reached by the gravitation of the plaster unassisted by some such means as is suggested by the use of the camel's-hair pencils or brushes. Two kinds of varnish are usually employed in the preparation of the surfaces of impressions for running out the models^ so as to prevent too