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Application of Various Types of Surfactants for Improving Hydrophilic Properties of Polyvinylsiloxane Dental Rubber Impression Materials and its Effects on Physical Properties  

Park, Yeong-Joon (Dept. of Dental Science, Graduate School Chonnam National University)
Hwang, Moon-Jin (Dept. of Dental Science, Graduate School Chonnam National University)
Kim, Min-Kang (Dept. of Dental Science, Graduate School Chonnam National University)
Song, Ho-Jun (Dept. of Dental Science, Graduate School Chonnam National University)
Ha, Kwang (Faculty of Applied Chemical Engineering and The Research Institute for Catalysis)
Kang, Shin-Young (Faculty of Applied Chemical Engineering and The Research Institute for Catalysis)
Publication Information
Elastomers and Composites / v.43, no.2, 2008 , pp. 88-103 More about this Journal
Abstract
This study was purposed to investigate the effects of surfactants and fillers on physical properties of hydrophilic polyvinylsiloxane dental impression materials (PVS). Incorporation of surfactants enhanced the hydrophilicity of the PVS, however, it induced increased viscosity and permanent deformation ratio, delayed setting, and decreased tensile strength. At high concentrations of surfactant, the tensile strength was observed to decrease significantly due to the internal pore formation. Especially, the hydrophilicity of the PVS was significantly enhanced with the addition of Silwet L-77. However, the viscosity, strain in compression, pore formation, and setting time increased whereas the elastic recovery rate and strength remarkably decreased. The PVS dental materials containing Span 20 showed the lowest degree of viscosity increase, delayed setting, pore formation, and hydrophilicity. The delayed setting, pore formation, and strength decrease caused by the incorporation of surfactant were improved by substituting the crystalline quartz filler with diatomaceous earth while the contact angle of PVS dental materials increased.
Keywords
surfactant; filler; hydrophilic; polyvinylsiloxane; impression material;
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