Excerpt from The Dental Cosmos, 1894, Vol. 36: A Monthly Record of Dental Science, Devoted to the Interests of the Profession There is no danger of injuring the dura with the trephine if it be carefully used. The opening thus made affords a means Of entrance for the cutting bur, which is next, with its protecting guard, inserted in the opening, and the section made along the lines previously deter mined, by running the engine at high speed and forcing the bit later all in the direction desired. The button-like guard at the point of the bur absolutely prevents injury to the dura, which is pressed or dissected away by it from its attachment in the line of the cut as the instrument progresses. 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.