Document Detail

Color changes in dry-pigmented maxillofacial elastomer resulting from ultraviolet light exposure.
MedLine Citation:
PMID:  8809255     Owner:  NLM     Status:  MEDLINE    
Five dry pigments and one maxillofacial elastomer were evaluated for color changes (delta E) resulting from prolonged exposure to two types of ultraviolet light. The elastomer, pigments, and pigmented elastomers were subjected to each ultraviolet light source for 400, 600, and 1800 hours, and delta E color shifts were determined. The unpigmented elastomer underwent minimally perceptible color change after 600 hours of exposure to both types of ultraviolet light. Two pigments underwent substantial color change after 400 hours, whereas the remaining three pigments remained color stable after 1800 hours. It was concluded that for the materials tested, early color changes in a prosthesis may be the result of degradation of certain ultraviolet light-susceptible pigments, whereas longer term color shifts may be caused by color changes within the elastomer.
M W Beatty; G K Mahanna; K Dick; W Jia
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of prosthetic dentistry     Volume:  74     ISSN:  0022-3913     ISO Abbreviation:  J Prosthet Dent     Publication Date:  1995 Nov 
Date Detail:
Created Date:  1996-10-31     Completed Date:  1996-10-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376364     Medline TA:  J Prosthet Dent     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  493-8     Citation Subset:  D; IM    
Department of Adult Restorative Dentisitry, University of Nebraska Medical Center, College of Dentistry, Lincoln, USA.
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MeSH Terms
Analysis of Variance
Dimethylpolysiloxanes / chemistry,  radiation effects*
Materials Testing
Maxillofacial Prosthesis*
Pigments, Biological / chemistry,  radiation effects*
Rubber / chemistry,  radiation effects*
Surface Properties
Time Factors
Ultraviolet Rays*
Reg. No./Substance:
0/A 2186; 0/Dimethylpolysiloxanes; 0/Pigments, Biological; 9006-04-6/Rubber

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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