Clinical implications of resilient denture lining material research. Part I: Flexibility and elasticity.

The clinical use of resilient denture liners is based on their flexibility and elasticity. The nine commercial resilient denture liners measured were less flexible during and after simulated chewing and clenching test sequences. The elasticity of the intraoral-cure liners reached maximal values at 24 hours. Although interpretations require caution, the results imply that the dentist should (1) use maximum liner thickness in the denture base when conditioning abused supporting tissues because of the material's tendency to stiffen under function, and (2) leave a functional impression in the mouth for at least 24 hours before pouring the cast.