A study of the breaking limit and ultimate strength of all elastomer impression materials in current use in Greece was made. Measurements were made at ten minutes, 24 hours, and 48 hours after mixing the material. Silicone and polyether materials showed greater ultimate strength than mercaptan materials in the first measurement.
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References
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Harvey, E.W.: Modern College Physics, New York: Van Nostrand Co., 1948, pp 206-207.
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Kaloyannides, TH: Elasticity of Elastomer Impression Materials: I. Measurement of Young's Modulus of Elasticity and of the Coefficient of Elasticity, J Dent Res52: 439, 1973.