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Mechanical Properties of Polymeric Dental Restorative Composites Filled With Silica Treated by Heat at Various Temperatures  

Kim, Ohyoung (Department of Polymer Science & Engineering, Dankook University)
Lee, Jung Soo (Department of Polymer Science & Engineering, Dankook University)
Seo, Kitaek (Department of Polymer Science & Engineering, Dankook University)
Kang, Doo Whan (Hyperstructured Organic Materials Research Center)
Kang, Ho-Jong (Center for Advanced Functional Polymers)
Gong, Myoung-Seon (Department of Chemistry, Dankook University)
Oh, Myoung-Hwan (Vericom R & D Center)
Publication Information
Applied Chemistry for Engineering / v.16, no.4, 2005 , pp. 549-555 More about this Journal
Abstract
To evaluate the posterior and anterior restoration of polymeric dental restorative composite (PDRC), PDRC was prepared using a silica filler treated by heat at various temperatures. Compressive strength (CS) and diametral tensile strength (DTS) values were investigated to study the effect of a heat-treated silica on the mechanical properties of PDRC using the recommended dental specifications. Both the particle size and specific volume of silica were decreased upon increasing the heat treatment temperature. CS and DTS values of PDRC containing a heat-treated silica showed 1.2 and 1.3 times, respectively, higher than that of the PDRC containing a neat silica. Also, it was found that the lower heat treatment temperature, the better mechanical properties of PDRC were observed because there was less agglomeration between silica particles. Specially, PDRC using a silica treated at $600^{\circ}C$ showed superior mechanical strength.
Keywords
silica; heat treatment; dental; restorative; agglomeration;
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