Mechanical properties of soft liner-poly(methyl methacrylate)-based denture material

Usanmaz, Ali
Latifoglu, MA
Dogan, A
Akkas, N
Yetmez, M
In this study, the mechanical properties of two different permanent soft lining materials and their bonding to poly(methyl methacrylate) (PMMA) were compared. Both of the soft liners were heat-cured commercial materials. The polymerization was carried out by conventional methods suggested by manufacturer, and the curing was done at the temperature of boiling water for 5, 15, 25, and 35 min. The sample groups were tested in the computer-aided tensile-testing machine at a rate of 2 mm/min. The slow rate helps the collection of more and more reliable data. At this time, the stress-strain curves were used to calculate ultimate tensile strength, elastic modulus, resilience, and toughness. The measurements were carried for PMMA, Molloplast B, Flexor, and a combination of PMMA,/soft liner. After introducing the soft lining material on PMMA of the same thickness, the new material structure was more elastic than the original PMMA. Flexor showed adhesive failure at studied curing periods, but Molloplast B gave larger tear strength values and cohesive rather than adhesive failure at the 25-min and 35-min curing times. (C) 2002 Wiley Periodicals, Inc.


Water Absorption of Two Different Denture Base Resins Reinforced with Dental Fiber Systems
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The absorption of water by denture base materials is important because it is directly related with dimensional stability of dental material. In this study, water absorption of denture base materials reinforced with different type of dental fiber systems was compared. The samples were prepared from heat-polymerized and microwave polymerized denture base resins and reinforced with different dental fiber systems. Five different reinforcement materials were used in this study, namely, (1) no fiber (control grou...
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Thermal and dynamic mechanical properties of microwave and heat-cured poly(methyl methacrylate) used as dental base material
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Two chemically modified chain extended/branched polyethylene terephthalate (PET) resins and one unmodified resin, considered to be linear, were characterized in terms of their melt flow, die swell, and viscoelastic properties. The three resins had reportedly similar nominal intrinsic viscosities but exhibited different viscoelastic behavior. The modified resins had lower melt flow index, higher die swell, higher complex viscosity and higher storage modulus than the unmodified one. The Cole-Cole plots of the...
Citation Formats
A. Usanmaz, M. Latifoglu, A. Dogan, N. Akkas, and M. Yetmez, “Mechanical properties of soft liner-poly(methyl methacrylate)-based denture material,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 467–474, 2002, Accessed: 00, 2020. [Online]. Available: