A comparison of various finishing procedures and their effect on amalgam restorations (an in vitro and in vivo scanning electron microscope study)
Sarosiek, Christine M.
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Procedures for finishing amalgam restorations have changed over the years. The purpose of this study was twofold. First, an attempt was made to correlate data from experiments in vitro with observations obtained in vivo. Secondly, surface characteristics and marginal capacity of amalgam restorations were evaluated in vivo and in vitro. In Vitro: 0cclucal preparations were cut on extracted teeth and restored with Dispersalloy* and Velvalloy**. The amalgam restorations were finished according to the following techniques: carved, carved-burnished, carved followed by polishing, carved-burnished followed by polishing. The specimens were stored in a saline solution when not being tested. All specimens underwent thermal cycling (200 times) after 4 and 7 months, before being prepared and observed for Scanning Electron Microscopy. Parallel clinical studies were carried out, in which the same finishing techniques were employed. Immediately following completion replicas of the restorations were made. This was repeated at regular intervals over a period of 6 months. The replicas were further processed and prepared for S.E.M. observation. The results derived from the S.E.M. micrographs demonstrated a slight difference between the different amalgams and finishing techniques. * Dispersalloy, Johnson and Johnson, Dental Products, New Brunswick, N. J. ** Velvalloy, S.S. White Co., P.A.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact email@example.com.Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1975. Pedodontics.Bibliography included.
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