Abstract
The purpose of this study was to evaluate dynamic viscoelastic properties of tissue conditioners using non-resonance forced vibration method. Four tissue conditioners were used. Measurements were carried out 2 hours and 7 days after mixing for each material. The complex modulus (G*), storage modulus of elasticity (G′), loss elasticity (G″), and loss tangent (tan δ) were determined at the frequencies of 0.01, 0.1, 1, 10, and 100 Hz and at different temperatures (20-70°) using a dynamic viscoelastometer. The results were as follows. The curves of G′, G″, and tan a according to frequency (0.01, 0.1, 1, 10, and 100 Hz) at different temperatures were superimposed to single master curves by the time-temperature superposition principle for each material. A wide range of G*, G′, G″, and tan δ was found among the four tissue conditioners. Flow properties of the four conditioners were found to reduce with time. The non-resonance forced vibration method is suited to determine dynamic viscoelastic properties of tissue conditioners.
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