Mechanical Retention of Resin Veneers.
NAVAL GRADUATE DENTAL SCHOOL BETHESDA MD
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Mechanical retention of resin veneers is provided for by a number of means, including the use of retentive beads. Studies have been reported in which resin-gold bonds were evaluated using beads, but no known effort had been made to determine the number beads needed for maximal retention. The purpose of this study was to determine the number of beads needed for maximal retention of Pyroplast and Hue-Lon acrylics. A total of 68 specimens were tested by separating both resins from a flat gold table, 14 inch square, containing from zero to and including 49 beads. Tensile forces needed to separate the bond were measured on an Instron testing instrument. It was determined that the number of retentive beads is as important variable in the evaluation of a resin-gold bond, and that the optimal number of beads varies with the type of resin used.
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