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Journal of Dental Research, Vol 60, 1754-1758, Copyright © 1981 by International & American Associations for Dental Research Online Journals

ARTICLES

Stain removal from a silicone maxillofacial elastomer

R. Yu, A. Koran, C. N. Raptis and R. G. Craig

In this study, environmental stains were removed from maxillofacial elastomers by solvent extraction. Silastic 44210, an RTV silicone with proven color and physical property stability, was stained with lipstick, disclosing solution, and methylene blue. These stains were then removed by solvent extraction with each of four chemically dissimilar solvents, namely: toluene, benzene, 1,1,1-trichloroethane, and n-hexane. An additional series of samples was prepared with 11 maxillofacial pigments, not for staining, but for evaluation of pigment stability. Results obtained from spectrophotometric measurements before and after solvent extraction demonstrated the effectiveness of solvent extraction in removing stains, while there was little or no change in the color of the pigments or the base elastomer.




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