Journal of Dental Research, Vol 60, 1697-1706, Copyright © 1981 by International & American Associations for Dental Research Online Journals
4-META opaque resin--a new resin strongly adhesive to nickel-chromium alloy
T. Tanaka, K. Nagata, M. Takeyama, M. Atsuta, N. Nakabayashi and E. Masuhara
1) A new adhesive opaque resin containing a reactive monomer,
4-methacryloxy-ethyl trimellitate anhydride (4-META), was prepared, and its
application to thermosetting acrylic resin veneer crowns was studied. 2)
The 4-META opaque resin was applied to a variety of nickel-chromium dental
alloy specimens which had undergone different treatment, and endurance
tests were conducted to evaluate the durability of adhesion. 3) Stable
adhesion against water penetration was achieved with metal surfaces first
etched with HCl and then oxidized with HNO3. A bond strength of 250 kg/cm2
was maintained even after immersion in water at 37 degrees C for 30 wk or
at 80 degrees C for ten wk. Furthermore, this value did not decrease even
after the specimens were subjected to 500 thermal cycles. 4) The 4-META
opaque resin studied can eliminate the necessity for retention devices on
metal castings. 5) The smooth 4-META opaque resin should have no adverse
effects on gingivae.
