Vulcanizers and lathes with their appurtenances : flasks, flask presses ... polishing wheels and materials, etc. / The S.S. White Dental Mfg. Co.

  • S.S. White Dental Manufacturing Company.
Date:
1911
Catalogue details

Licence: In copyright

Credit: Vulcanizers and lathes with their appurtenances : flasks, flask presses ... polishing wheels and materials, etc. / The S.S. White Dental Mfg. Co. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    is T H E S.S.WH1 T E DEN T A L M F G . C 0 [ Ai'KIL 1911 SCIENTIFIC SUCTION FOR VULCANITE DENTURES The ideal scientific suction in vulcanite dentures is obtained by making a perfect fit. If the fit is perfect, the suction will be ideal. But every prosthetic dentist knows the difficulties of obtaining this perfect lit. A slight drawing of the plaster over an irregularity, a bulging because of soft tissues, or even at times the slight expansion of the plaster itself in setting, will ruin the fit. The usual remedy—the air-chamber—has objections in that it causes irritation through the sharp edges and decided offsets in the soft tissues which it forms, in some cases progressing to paralyzation of the parts. Many devices have been proposed to avoid this, two of the most approved of 'which we present below, the aluminum Suction Plate and the Cohesion Surface Form. In both of these the idea is the division of the suction area into numerous small spaces, which may be distributed as desired over the denture instead of confining it to a single large space in the central portion. Plates so made adhere as if glued to the parts, without causing irritation or marked indentations of the mucous surface. ALUMINUM SUCTION PLATES The Aluminum Suction Plate is made of thin Aluminum, embossed in such a way that one side presents the appear- ance of a series of minute cup-like de- pressions, the other of corresponding papilliform prominences. The edges of the depressions are rounded, and their reproduction on the vulcanite provides a series of small suction points or spaces, each a perfect vacuum cham- ber, and which in the aggregate provide a holding power at least equal to that of the air-chamber without its disad- vantages. The metal is sufficiently rigid to prevent the tlattening of the cups under the pressure of vulcanizing. Used as a lining for the denture or merely a die upon which to mold its contact sur- face. In the former case it is attached permanently in the vulcanizing; in the latter, it is stripped off after the conclusion of that process. Sold in oblong sheets, 1J x Ig inches; it may be cut into pieces as desired and distributed at ad- vantageous points. Put up in boxes of six sheets, each box containing full directions for use. Price per box of six $0.25 COHESION=SURFACE FORMS tion that T h e Cohesion-Sur- face Form is of the same general charac- ter of embossing as the Aluminum Suc- P 1 a t e, except it is made of pure tin and as sold is of a form to be at once fitted to the model. The little cups, also, are concaved at the base, giving them the shape shown in the enlarged sectional view. This Form can also be cut to suit the requirements of the case. Strong adhesion can be had with a narrow plate. Lower plates made with this device are very firm. Can be permanently attached to the vulcanite as a lining or used merely as a die to mold the sur- face. When used as lining it is fixed to the plate before vulcanizing with rubber cement. Put up in packages containing one dozen Forms of the size shown, which can be cut for either upper or lower plates. Full directions with each package. Price, Cohesion-Surface Forms per box $0.25 Rubber Cement per bottle .25