Surface Finishing Of Ceramics

Excerpt from The Science of Ceramic Machining and Surface Finishing II Machining and surface finishing operations play a vital role in the production and reliable use of ceramics. It is essential, therefore, that the full scope of this technologically important subject be periodically reviewed and evaluated. One of the most effective ways of accomplishing this is through meetings, such as this Second Symposium on Ceramic Machining and Surface Finishing. These meetings provide the necessary forum for the direct exchange and discussion of new data, recently developed techniques, and advances in our understanding of underlying principles. This Symposium, in particular, has focused on both the scientific and technological advances in ceramic machining and related topics. The interaction that has occurred at this meeting between science and technology will provide many direct benefits and, hopefully, will act as a stimulus for further progress. Through publication of these proceedings, the information presented at this symposium, together with any derived benefits, can be shared with the scientific and industrial community at large. The National Bureau of Standards is pleased to be responsible for this publication, and to have joined with the Air Force Office of Scientific Research, the Office of Naval Research, and the American Ceramic Society in sponsoring the symposium. 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.

The surface finish of ceramic restorations is important with respect to esthetics, strength, wear of opposing teeth. Hence, glazing has always been advocated as the last surface treatment before final cementation. It is a common practice for clinicians to adjust the porcelain surfaces of dental prostheses. Various options are available like unglazing, polishing and glazing. The change in surface roughness after different surface finishing techniques has attracted the attention of prosthodontist regarding wear of opposing teeth, the strength, plaque retention and appearance of restorations.Currently there exists a considerable controversy over applying the best method to achieve the smoothest and strongest porcelain restoration. In the literature contrasting opinions have been reported by different research groups regarding testing different ceramic materials and surface finishing techniques i.e. auto glazing, over glazing and polishing with a variety of instruments.