Notes on the treatment and filling of teeth / by Wm. Cass Grayston.

  • Grayston, William Cass.
Date:
1904
Catalogue details

Licence: In copyright

Credit: Notes on the treatment and filling of teeth / by Wm. Cass Grayston. 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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    completed filling, and no satisfactory explanation is forthcoming. Semi-cohesive gold, if manipulated with a mallet, can be condensed into a perfectly coherent mass, the density of which (density and hardness are not synonymous terms) cannot be surpassed with cohesive gold. But if hand pressure is used with both of these kinds of golds the cohesion produced with the semi-cohesive variety will usually be inferior, although in many cases it may be sufficient for all practical purposes. The advantage of semi-cohesive gold is that it is a little more adaptable than cohesive gold, and consequently excellent adaptation, and an even condensation, may be produced with larger pieces or with broader ended pluggers. Crystal Gold. — So much misconception exists concerning crystal gold, and so many misleading statements have been made in the past, and continue to be made at the present day, about this form of gold, that it may not be out of place to quote from an article '' On the Value of Crystal Gold in Den- tistry, by the late Dr. N. W. Williams, in the Inter- national Dental Journal, February 1892. After stating that crystal gold was first brought to the notice of the dental profession in 1855 or 1856, and was the invention of Professors George Watt and J. Taft, and describing the process of its manu-