Excerpt from The Dental Record, 1896, Vol. 16: A Monthly Journal of Dental Science, Art, and Literature, Devoted to the Interests of the Profession Osteo, or artificial bone, fillings are usually oxychloride of zinc or phosphate of zinc. The oxychloride is now, comparatively speak ing, rarely used. It is more troublesome to work than many of the phosphates, and must be kept perfectly dry during insertion and carefully protected from moisture while setting by careful varnishing. It appears to be harder than the average phosphate, but is, as a rule, considered to be not so durable in the mouth. It often causes pain on insertion, but is said to have a hardening effect on soft dentine, although I cannot say I have observed this myself. Phosphate of zinc, like the oxychloride, is in the form of a powder (oxide of zinc) and a liquid (phosphoric acid) which are mixed together when required in proportions sufficient to make a paste or cement for the case in hand. A little of the liquid and a little of the powder are placed on a glass slab, and then the powder is gradually worked into the liquid with a spatula until the mass is of a putty like consistency, when it should be rapidly pressed into the cavity and the surface trimmed to shape as it sets. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.