Color stability of provisional prosthodontic materials

Discoloration of provisional prosthodontic materials may result in patient dissatisfaction and additional expense for replacement. The purpose of this study was to determine the color stability of 5 provisional prosthodontic materials before and after immersion in distilled water or coffee for 20 da...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 2004-05, Vol.91 (5), p.447-452
Main Authors: Sham, Arthur S.K, Chu, Frederick C.S, Chai, John, Chow, Tak W
Format: Article
Language:English
Subjects:
Analysis of Variance
Bisphenol A-Glycidyl Methacrylate - chemistry
Coffee - chemistry
Colorimetry - instrumentation
Dental Materials - chemistry
Dental Materials - radiation effects
Dental Prosthesis
Dentistry
Humans
Immersion
Materials Testing
Methylmethacrylates - chemistry
Polymethacrylic Acids - chemistry
Prosthesis Coloring
Time Factors
Ultraviolet Rays
Water - chemistry
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Summary:Discoloration of provisional prosthodontic materials may result in patient dissatisfaction and additional expense for replacement. The purpose of this study was to determine the color stability of 5 provisional prosthodontic materials before and after immersion in distilled water or coffee for 20 days or exposure to ultraviolet (UV) light for 24 hours. A total of 105 disc-shaped specimens (20±0.1 mm by 1±0.05 mm) were fabricated with 5 provisional prosthodontic materials: polyethyl methacrylate resins (Trim II), polymethyl methacrylate resins (Duralay; Alike), and bis-acryl methacrylate resin (Luxatemp; Integrity), according to manufacturers' instructions (n=21). Seven specimens of each material were randomly selected and immersed individually in distilled water (60°C) or coffee (37°C) for 20 days or exposed to UV irradiation for 24 hours, respectively. Color was measured as CIE L ∗a ∗b ∗ with a colorimeter before and after the immersion or UV exposure. Color change (ΔE) was calculated and data were analyzed with 1-way ANOVA and the Tukey multiple comparisons test (α=.05). For specimens immersed in water, the color change of bis-acryl-methacrylate–based provisional materials (Integrity and Luxatemp) was significantly less than that of 3 methyl/ethyl methacrylate–based provisional materials (Trim II, Alike, and Duralay) ( P
ISSN:0022-3913
1097-6841
DOI:10.1016/j.prosdent.2004.03.005