These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Color changes of resin composites in the reflectance and transmittance modes.
    Author: Lee YK, Powers JM.
    Journal: Dent Mater; 2007 Mar; 23(3):259-64. PubMed ID: 16519927.
    Abstract:
    OBJECTIVES: The objective of this study was to evaluate the changes in color and color coordinates after accelerated aging of resin composites depending on the measuring modes of reflectance and transmittance. METHODS: Color of seven resin composites (1-mm thick specimens) was measured in the reflectance mode and in the transmittance mode. After the baseline color measurement, the specimens were aged for total energy of 150 kJ/m2. Color change after aging was calculated in the reflectance mode and in the transmittance mode. Based on the data of A2 shade composites, the influence of measuring mode on the color change (DeltaEab*) and changes in three color coordinates (DeltaL*, Deltaa* and Deltab*) after aging was analyzed by ANOVA (p<0.01). RESULTS: Measuring mode influenced DeltaEab*, DeltaL* and Deltaa* values. There were significant correlations between the color changes measured in the reflectance mode and in the transmittance mode (r=0.91). SIGNIFICANCE: The color changes in the transmittance mode can roughly be estimated based on the reflected color changes.
    [Abstract] [Full Text] [Related] [New Search]