Stain Removal from a Silicone Maxillofacial Elastomer

Abstract

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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References

Yu, R. ; Koran, A. ; and Craig, R.G. : Physical Properties of Elastomers for Maxillo

facial Appliances under Accelerated Aging, J Dent Res 59:1141, 1980.

Craig, R.G. ; Koran, A. ; Yu, R. ; and Spencer, J. : Color Stability of Elastomers for Maxillofacial Appliances, J Dent Res 57: 866-871, 1978.

Koran, A. ; Yu, R. ; Powers, J.M. ; and Craig, R.G. : Color Stability of a Pigmented Elastomer for Maxillofacial Appliances , J Dent Res 58:1450, 1979.

Koran, A. ; Powers, J.M. ; Lepeak, P.J. ; and Craig, R.G. : Stain Resistance of Maxillofacial Materials, J Dent Res 58:1455, 1979.

Flory, P.J. : Statistical Mechanics of Swelling of Network Structures, J Chem Phys 18: 108-112, 1950.

Yu, C.U. : Experimental Studies of Rubberlike Elasticity , University of Michigan, Chemistry Department, 1974. Thesis.

Yu, C.U. and Mark, J.E. : Evaluation of the Theories of Rubberlike Elasticity using Swollen Networks Crosslinked at Different Degrees of Dilution , Rubber Chem and Tech 48:186,1975.

Brandrup, J. and Immergut, E.H. : Polymer Handbook, New York: Wiley Interscience Publishers, 1966, 230 p.

10.

Wyszecki, G. and Stiles, W.S. : Color Science, New York: Wiley and Sons, Inc., 1967 , 628 p.

11.

Billmeyer, F.R. and Saltzman , M. : Principles of Color Technology , New York: Wiley and Sons, Inc. , 1966, 23 p.

12.

Dalby, J. : BMD8V - Analysis of Variance, Ann Arbor: Statistical Research Laboratory, 1968, 4 p.

13.

Guenther, W.C. : Analysis of Variance, Englewood Cliffs, NJ: Prentice-Hall, 1964, 199 p.