Comparison of microleakage between modified Class V preparations and conventional preparations
Date
1978
DOI
Authors
Babeely, Khaldoun M.
Version
OA Version
Citation
Abstract
The use of adhesive restorative materials in operative dentistry has been received enthusiastically. Few studies have been performed to show the improvement of the marginal seal using these materials. A decrease in irritation of the pulp, in marginal staining, in postoperative sensitivity, and in the recurrence of caries have been related to improvement of the seal. The surfaces etched in these studies consisted of either a leveled margin or of an area of external surface enamel, when an overlap of resin was contemplated. Technical articles have appeared recently advocating the pretreatment of the enamel margins of cavity preparations with 37 to 50% phosphoric acid, as a means of enhancing the bond of resin to enamel or to prevent leakage, at least temporarily. However, these articles do not suggest whether or not to use an intermediary low-viscosity resin, a bevel, or a butt joint.
The objectives of this study are to evaluate the microleakage of conventional vs. modified Class V cavity preparation and to determine whether these advocated techniques are clinically feasible.
Thirty extracted human teeth, and fifty teeth from two dogs were used in this study. They were divided in three groups: A. Conventional preparation which was restored with Adaptic - "control group," B. Conventional preparation which was acid etched with 50% phosphoric acid and was filled with Adaptic after being coated with bonding agent, C. The same as group B in addition the enamel was beveled.
The results supported the concept of acid etching the enamel margins and the use of bonding agent, also beveling the enamel appeared to be advantageous. Only group B from the human teeth was different from the above results, it showed that there was no significant improvement when teeth were acid etched followed by a bonding agent.
In conclusion it can be stated that the acid etched butt joint and acid etched modified preparation in combination with a bonding agent seems to improve the marginal seal.
Description
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Thesis (M.Sc.D.)--Boston University Henry M. Goldman School of Graduate Dentistry, 1978.(Pedodontics)
Bibliography: p. 41-46.
Thesis (M.Sc.D.)--Boston University Henry M. Goldman School of Graduate Dentistry, 1978.(Pedodontics)
Bibliography: p. 41-46.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.