Tissue Conditioners Containing Poly (butyl methacrylate) Powder

Katakura, Naoyuki; Hosotani, Makoto; Iijima, Kazunori; Honma, Hisao; Sakaguchi, Midori

doi:10.4012/dmj.8.35

Cited by 4 publications

(1 citation statement)

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“…DMA je moguće ispitivati viskoelastične karakteristike materijala u širokom opsegu frekvencija i temperatura. DMA su ispitivani mnogi dentalni materijali [143][144][145][146][147][148][149] . Merenja dinamičko-mehaničkih karakteristika dentalnih materijala pri frekvenciji od 1 Hz je veoma bitna jer se pri toj frekvenciji simuliraju uslovi žvakanja 147,149 .…”

Section: Apsorpcija Smeše Etanol/vodaunclassified

Modification of poly(methyl methacrylate) denture base materilas with diesters of itaconic acid

Spasojević¹

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Section: Apsorpcija Smeše Etanol/vodaunclassified

Modification of poly(methyl methacrylate) denture base materilas with diesters of itaconic acid

Spasojević¹

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Evaluation of viscoelastic properties, hardness, and glass transition temperature of soft denture liners and tissue conditioner

et al. 2019

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Soft denture liners and tissue conditioners are widely used for the denture patients to cushion masticatory force and condition abused tissues, respectively. This study assessed methods for the evaluation of the viscoelasticity and glass transition temperature (T g) of the silicone permanent soft liner, acrylic permanent soft liner, and tissue conditioner. Three rheological parameters of storage modulus (E′), loss modulus (E″), and loss tangent (tan δ), T g , and hardness were determined using dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and the Shore A0 hardness test. Five specimens were measured for each material. The time-temperature superposition principle was applied to produce master curves of E′, E″, and tan δ for the tested materials at a reference temperature of 37 °C. The acrylic permanent soft liner and tissue conditioner exhibited viscoelastic behavior and sensitivity to frequency, especially at lower frequencies. The silicone permanent soft liner showed elastic behavior and was frequency-independent. T g for the acrylic permanent soft liner was higher than that for the tissue conditioner, which in turn was higher than that for the silicone permanent soft liner for both DMA and DSC. In DMA, a higher frequency led to higher T g values. A positive linear relationship was found between Shore A0 hardness and E′ values, but not E″ and tan δ values. Shore hardness reflects elasticity, but not viscosity. The results of the present study can be used to improve methods for evaluating the viscoelasticity and T g of soft denture liners and tissue conditioners.

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