Elsevier

Dental Materials

Volume 4, Issue 2, April 1988, Pages 55-59
Dental Materials

Original article
Color changes of composites on exposure to various energy sources

https://doi.org/10.1016/S0109-5641(88)80090-3Get rights and content

Abstract

The color stability of composites, on exposure to irradiation (1) by a 150 klux xenon lamp, (2) a standard RS light source and (3) at elevated temperature at 60°C, in air or water and under different experimental conditions was determined for various times. Composites studied included chemically and light cured hybrid and microfilled resins and a material copolymerized by light and chemical aftercure. Color changes of composites intensified on increasing the irradiation time. Exposure to the 2 light sources under similar conditions gave comparable results. Visible light cured materials studied were more color stable than 2 common chemically cured composites. Light shades yielded more visible color changes than dark shades of the same brand. There was a significantly more severe discoloration of composites kept in water at 60°C than for those stored in air. Comparison with results in 2 clinical studies of color changes, using 2 of the chemically cured composites investigated here, indicates that these 2 restoratives, which pass the ANSI/ADA or ISO specification tests, discolor in clinical use after 2–3 years.

References (21)

  • VankerckovenH et al.

    Characterization of composite resins by NMR and TEM

    J Dent Res

    (1981)
  • New American Dental Association Specification No. 27 for direct filling resins

    JADA

    (1977)
  • Plastics — methods of exposure to laboratory light

    International Standard ISO 4892

    (1981)
  • ViohlJ

    Verfarbung von Kunststoffen durch unterschiedliche Lichtquellen

    Dtsch Zahnarztl Z

    (1976)
  • ViohlJ

    Color stability of dental resins

    Quintessence Int

    (1980)
  • Hintze H. Klinische und Physikalische Untersuchungen der Farbbestandigkeit von Zahnarztlichen Füllungskunststoffen,...
  • Dental materials-determination of color stability of dental resin materials, Draft International Standard ISO/DIS...
  • Resin-based dental filling materials

    International Standard ISO 4049

    (1978)
  • AsmussenE

    An accelerated test for color stability of restorative resins

    Acta Odontol Scand

    (1981)
  • Dental resin based restorative materials

    (April 23, 1984)
There are more references available in the full text version of this article.

Cited by (26)

  • Long-term Success of Nonvital, Immature Permanent Incisors Treated With a Mineral Trioxide Aggregate Plug and Adhesive Restorations: A Case Series from a Private Endodontic Practice

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    Citation Excerpt :

    Recurrence of discoloration is fairly common after intracoronal bleaching and is reported to occur in up to 37% of all cases (53). Composites are susceptible to color change over time, particularly self-cure and dual-cure composites, because of hydrolysis (54) exposure to ultraviolet light (55), uptake of staining substances from food and drinks (56), and the type of accelerator (57). In addition, it may be hypothesized that the light-transmitting properties of these teeth may have been affected by the presence of an opacious composite material in the large pulp chamber.

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G. M. Brauer, National Bureau of Standards, Dental and Medical Materials, Polymers Building, Room A-143, Gaithersburg, MD 20899, U.S.A.

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