Setting properties of alginate impression materials in dynamic viscoelasticity.
The viscoelastic properties of three alginate impression materials were investigated. A landmark of working time was calculated using a raw phase-time curve. A landmark of setting time was calculated from an inflection point of the divided difference of the first order in the share modulus-time curve. As a result, the working time was common at the point of delta = 45 degrees in variable frequencies. The mean value was obtained with less deviation. The setting times obtained were similar for variable frequencies. The mean values showed a distinct difference for each impression material.
Shigeto
N
N
Department of Prosthetic Dentistry, Hiroshima University School of Dentistry, Japan.
Yamada
Y
Y
Iwanaga
H
H
Subianto
A
A
Hamada
T
T
D000464:Alginates / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003760:Dental Impression Materials / Q000737:chemistry*; D004548:Elasticity; D016015:Logistic Models; D008422:Materials Testing; D012212:Rheology; D013997:Time Factors; D014783:Viscosity
D000464:Alginates; D003760:Dental Impression Materials; C092299:Coe Alginate