Age changes in the viscoelasticity of a temporary soft lining material.
The viscoelastic properties of a widely used temporary soft lining material have been monitored in vivo and in vitro using a force distance probe. Over a period of 8 weeks' clinical use, Coe Soft demonstrated a significant and continued reduction in compliance with time, the reduction being particularly rapid over the first week. These changes were not associated with a reduction in measured lining thickness for which significant changes were not found. In vitro immersion in water, saline or artificial saliva was characterized by a rapid and significant reduction in compliance values over the first week. Further continued reductions in compliance values were only observed in artificial saliva over 8 weeks, and on prolonged immersion in distilled water over 96 weeks. All reductions in compliance were significantly less than those seen clinically.
Jepson
N J
NJ
Department of Prosthodontics, Dental School, University of Newcastle upon Tyne, UK.
McCabe
J F
JF
Storer
R
R
D000180:Acrylic Resins / Q000737:chemistry*; D003822:Denture Liners; D004548:Elasticity; D005260:Female; D006801:Humans; D007101:Immersion; D066298:In Vitro Techniques; D008297:Male; D008422:Materials Testing; D012464:Saliva, Artificial; D012965:Sodium Chloride; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014783:Viscosity; D014867:Water
D000180:Acrylic Resins; D012464:Saliva, Artificial; D014867:Water; D012965:Sodium Chloride; C076423:Coe Super-Soft