Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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A STUDY ON THE COLOR STABILITY AND MICROHARDENSS OF LIGHT CURING RESINS

광중합 레진의 색 안정성과 미세경도에 관한 연구

  • Oh, Se-Hong (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
  • Im, Mi-Kyung (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
  • Cho, Hye-Won (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
  • Lee, Kwang-Hee (Department of Pedodontics, College of Dentistry, Wonkwang University)
  • 오세홍 (원광대학교 치과대학 치과보존학교실) ;
  • 임미경 (원광대학교 치과대학 치과보존학교실) ;
  • 조혜원 (원광대학교 치과대학 치과재료학교실) ;
  • 이광희 (원광대학교 치과대학 소아치과학교실)
  • Published : 1992.03.31
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Abstract

Tooth colored resin restorative materials are widely used in anterior teeth restorations. The color instability of resin was the main cause of failure in resin restorations. The purpose of this study was to investigate color stability and microhardness of serval visible light curing resins. Colorimetric measurements(Tokyo Denshoku Co., Japan) and microhardness tests(Matusuzawa, MXT 70, Japan) were made on six composite resins before and after controlled immersion treatments. The six composite resins were BIS - FILM(BISCO, USA), Durafill(Kulzer, Germany), Helioprogess(VIVADENT, Germany), Palfique(TOKUYAMA SODA, Japan), Silux(3M, USA), Photoclearfil(KURARAY, Japen). Six light curing resins showed significant color change after 2 weeks. Palfique exhibited the hightest $dE^*$ values and Helio progress presented the lowest $dE^*$ values. Photoclearfil showed the highest microhardness value. Durafill and Helio progress showed lower microhardness values. Microhardness values were decreased after 8 weeks in Bisfil, Palfique light, and Photoclearfil.

Keywords