Restorative Dentistry and Endodontics
- Volume 22 Issue 1
- /
- Pages.358-373
- /
- 1997
- /
- 2234-7658(pISSN)
- /
- 2234-7666(eISSN)
A STUDY ON THE COLOR STABILITY OF RESIN MODIFIED GLASS IONOMERS
레진 강화형 글라스아이오노머의 색 안정성에 관한 연구
- Koo, Dae-Hoi (Department of Conservative Dentistry, College of Dentistry, Wonkwang University) ;
- Lee, Yong-Keun (Department of Dental Materials, College of Dentistry, Wonkwang University) ;
- Son, Ho-Hyun (Department of Conservative Dentistry, College of Dentistry, Seoul National University) ;
- Im, Mi-Kyung (Department of Conservative Dentistry, College of Dentistry, Wonkwang University)
- 구대회 (원광대학교 치과대학 치과보존학교실) ;
- 이용근 (원광대학교 치과대학 치과재료학교실) ;
- 손호현 (서울대학교 치과대학 치과보존학교실) ;
- 임미겸 (원광대학교 치과대학 치과보존학교실)
- Published : 1997.04.08
Abstract
Resin modified glass ionomers were introduced in 1988 to overcome the problems of moisture sensitivity and low early mechanical strength of conventional glass ionomers and to maintain their clinical advantages. The purpose of this study was to evaluate the color stability of four resin modified glass ionomers(Fuji II LC, Vitremer, Dyract and VariGlass), one resin composite material(Z-100), and one conventional glass ionomer(GC Fuji II) under several conditions. These conditions were as follows: 1) before curing, 2) after curing, 3) after polishing, 4) after 500 thermocycling, 5) after 1,000 thermocycling, 6) after 1,500 thermocycling and 7) after 2,000 thermocycling. Three specimens of each material/shade combination were made. Materials were condensed into metal mold with a diameter of 10 mm and a thickness of 2.0 mm, and were pressed between glass plates. The material was polymerized using a light polymerizing unit(Visilux II, 3M, USA). After removal of excess, the surface was polished sequentially on wet sandpapers. A reflection spectrophotometer(Model TC-6FX, Tokyo Denshoku Co., Japan) was used to determine CIELAB coordinates(
Keywords