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J Dent Res 51(3): 773-779, 1972
© 1972 International and American Associations for Dental Research
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Elastic Recovery of Polysulfide Base Impressions

E. P. LAUTENSCHLAGER 1, P. MIYAMOTO 1, and R. HILTON 1

1 Northwestern University, Chicago, Illinois 60611, USA

Motion pictures were used to measure the elastic recovery of polysulfide base impression materials during clinically simulated undercut removals. Recovery was complex; it involved strain gradients, withdrawal rates, and material thickness. Behavior could be correlated to tests on specimens of simpler geometries. Materials tested were found to be acceptable for clinical use.

Submitted on April 14, 1971






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