Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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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
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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.

치아수복용 고분자 복합체(polymeric dental restorative composite, PDRC)의 전치부와 구치부에의 응용 가능성을 높이고자 PDRC를 구성하는 실리카 충진재를 다양한 온도에서 열처리시켜 siloxane 기로 연결된 구조의 개질된 실리카를 제조하고 이를 PDRC 제조에 사용하였다. 제조된 PDRC의 중합 특성을 중합전환률, 중합깊이, 그리고 체적 중합수축률 등을 분석하여 고찰하였다. 실험 결과, 사용된 실리카의 열처리 온도가 높아짐에 따라 제조된 PDRC의 중합깊이는 감소하였고 체적 중합수축률과 중합전환률 값은 실리카 입자의 평균크기 감소에 따른 PDRC 내 resin matrix의 상대적 양의 증가로 인해 일정하게 증가함을 알 수 있었다.

Keywords

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