A manual of dental mechanics.

  • Coles, Oakley, 1845-1906
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: A manual of dental mechanics. Source: Wellcome Collection.

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    necessary to roughen them with a scorper or three-pointed file, and it is very useful to adopt the same plan with the trays used for any of the plastic materials, as it prevents the liability of their leaving the otherwise smooth metallic surface. For the lower jaw it is sometimes requisite to make a special tray, though this but rarely happens. It will be described therefore under the head of Special Cases ; if plaster is used for the inferior maxilla, then the best form of tray is that shown in Fig. 7. A thin strip of wax is attached to the lower free Fig. 7. Fig. 8. border of the tray, and is then pressed on the surface of the gums; this will keep the saliva from flowing into the plaster when it is introduced into the mouth. Then, in taking
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