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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

Publication:
March/April 1999
Volume 12 , Issue 2

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Color Stability of Visible Light-Cured, Hard Direct Denture Reliners: An In Vitro Investigation

Polyzois/Yannikakis/Zissis

Pages: 140-146
PMID: 10371916

Purpose: Previous studies have disclosed the unsatisfactory color stability of autopolymerizing, hard direct denture reliners (HDDR). The present study investigated the color stability of the newly introduced visible light-cured and dual-cured HDDRs. Materials and Methods: Five HDDRs were evaluated after 1 hour, 1 day, 7 days, and 30 days of immersion in coffee, tea, and water. Color measurements were obtained with a tristimulus colorimeter, and color differences (AE*) were calculated. Results: After 30 days of immersion one visible light-cured material exhibited the highest AE* value (17.8). The other materials showed acceptable color stability in water and coffee. However, tea strongly affected their color. Conclusion: Reliners, staining solutions, and immersion time are significant factors that affect color stability. After 7 days of immersion, all of the materials showed perceptible color differences. Tea exhibited higher staining capacity than coffee.

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