Evaluation of the viscoelastic properties of denture soft lining materials

摘要: Denture soft lining materials are widely used in prosthetic dentistry. Their success has been attributed to their softness and resilience, properties described by viscoelasticity. Though these have extensively investigated laboratory studies, clinical studies limited. The viscoelastic of the temporary material Coe Soft permanent Palasiv 62 Molloplast-B studied using a force/distance probe whereby penetration was measured against time under constant stress. Derived values an initial time-dependent compliance allowed quantitative vivo vitro assessment freshly prepared samples each test comparison between materials. baseline behaviour response regimen similar for both specimens. Three types could be identified: (i) strain which clearly less than specimen thickness--elastic (Molloplast-B); (ii) equal or nearly thickness--apparent elastic (Coe Soft); (iii) increased with load application--viscoelastic (Palasiv 62). mean range thickness approximately half that seen There much smaller all might anticipated from knowledge relative softness.