Polymerization Behavior of Polymeric Dental Restorative Composites Filled with Si-O Bridged Silica

Si-O Bridged 실리카가 충진된 치아수복용 고분자 복합체의 중합 특성

  • Kim, Ohyoung (Department of Polymer Science & Engineering, Dankook University) ;
  • Lee, Jung Soo (Department of Polymer Science & Engineering, Dankook University)
  • 김오영 (단국대학교 공과대학 공학부 고분자공학전공) ;
  • 이정수 (단국대학교 공과대학 공학부 고분자공학전공)
  • Received : 2005.05.23
  • Accepted : 2005.07.18
  • Published : 2005.10.10

Abstract

To improve the application of polymeric dental restorative composite (PDRC) for the posterior and anterior restoration, silica bridged with siloxane unit was firstly prepared by heat-treating a silica filler at various temperatures. Degree of conversion (DC), depth of cure, and dynamic volumetric polymerization shrinkage values of PDRC filled with silica bridged with siloxane unit were investigated to study the effect of heat-treated silica on the polymerization behavior of PDRC. From the experimental result, it was found that depth of cure was decreased with an increase of heat treatment temperature. on the other hand, both DC and polymerization shrinkage values were uniformly enhanced with increasing the heat treatment temperature. This phenomenon can be explained from the study that showed decrease of average particle size of silica resulted in the increase of relative amount of resin matrix in PDRC.

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