Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Surface roughness and color stability of various composite resins

수종의 복합 레진의 표면 거칠기와 색 안정성

  • Lee, Sung-Yi (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Kim, Hyeon-Cheol (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Park, Jeong-Kil (Department of Conservative Dentistry, School of Dentistry, Pusan National University)
  • 이성이 (부산대학교 치과대학 치과보존학교실) ;
  • 김현철 (부산대학교 치과대학 치과보존학교실) ;
  • 허복 (부산대학교 치과대학 치과보존학교실) ;
  • 박정길 (부산대학교 치과대학 치과보존학교실)
  • Published : 2007.11.30
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Abstract

The purpose of this study was to evaluate the difference in the surface roughness after polishing and to evaluate the difference in color stability after immersion in a dye solution among four types of composite resin materials. Four light-polymerized composite resins(Shade A2) with different sized filler content(a nanofilled, a hybrid, a microfilled, a flowble) were used. Average surface roughness (Ra) was measured with a surface roughness tester (Surftest Formtracer) before and after polishing with aluminum oxide abrasive discs(Super-Snap). Color of specimens before and after staining with 2% methylene blue solution were measured using spectrophotometer(CM-3700d) with SCI geometries. The results of Ra and ${\Delta}E$ were analyzed by one-way analysis of variance(ANOVA), a Scheffe multiple comparison test and Student t-test(p=0.05). After polishing, Ra values were decreased regardless of type of composite resins. In surface roughness after polishing and color stability after staining, nanofilled composite resin was not different with other composite resins except flowable resins.

본 연구의 목적은 네 종류의 복합레진의 연마 후의 표면 거칠기에 있어서의 차이와 염색액에 담근 후 색 안정성에 있어서의 차이를 평가하기 위한 것이다. 필러 크기와 함량이 다른(나노입자형, 혼합형, 미세입자형, 흐름성) 네 종류의 광중합 복합레진(색상 A2)을 사용하였다. 산화 알루미늄 마모 디스크(Super-Snap)로 연마하기 전과 후에 평균 표면 거칠기(Ra)를 표면 조도 측정기 (Surftest Formtracer)로 측정하였다. 2% 메틸렌 블루 용액으로 착색하기 전과 후 표본의 색은 SCI geometry를 이용해 spectrophotometer(CM-3700d)로 측정되었다. 표면 거칠기와 색 변화 값은 one-way ANOVA, Scheffe multiple comparison test와 Student t-test로 분석되었다. 연마 후, 표면 거칠기 값은 복합레진의 종류에 관계없이 감소하였다. 연마 후 표면 거칠기와 착색 후 색 안정성에 있어서, 나노입자형 복합레진이 흐름성 레진을 제외한 다른 복합레진들과 유사하였다.

Keywords

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