Relationship Between the Degree of Conversion and Internal Discoloration of Light-activated Composite

• IMAZATO Satoshi

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

• TARUMI Hisashi

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

• KOBAYASHI Kyoko

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

• HIRAGURI Hideki

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

• ODA Kozo

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

• TSUCHITANI Yasuhiko

  Department of Operative Dentistry, Osaka University Faculty of Dentistry

Bibliographic Information

Other Title

• 光重合型コンポジットレジンの重合率と変色の関係について

Abstract

In order to elucidate the relationship between the degree of conversion and internal discoloration of light-activated composite, four experimental composites which contained different amounts of Bis-GMA and TEGDMA were prepared, and the degree of conversion and discoloration of each composite, with or without annealing, were determined. The degree of conversion was measured by Fourier transformation infrared spectroscopy and the color change was determined after 1, 2, 3 and 4 weeks of immersion in water at 60°C. The non-annealed composites demonstrated a greater degree of conversion and less discoloration as the amount of TEGDMA was increased. Annealed composites showed a significantly greater degree of conversion and less discoloration compared with the non-annealed composites. The results indicate that the greater the degree of conversion, the less the discoloration of composite, and the correlation between the two factors was significant for light-activated composite.

Journal

• Dental Materials Journal

  Dental Materials Journal 14 (1), 23-30,101, 1995

  The Japanese Society for Dental Materials and Devices

Keywords

• Composite
• Degree of conversion
• Discoloration

Details

• CRID: 1390282679691951104
• NII Article ID: 110002984162
• NII Book ID: AA10443149
• DOI: 10.4012/dmj.14.23
• ISSN: 18811361
• ISSN: 02874547
• ISSN: http://id.crossref.org/issn/02874547
• PubMed: 8940542
• Web Site: https://www.jstage.jst.go.jp/article/dmj1982/14/1/14_1_23/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10744040
• Web Site: https://search.jamas.or.jp/link/ui/1996110177
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • NDL-Digital
  • CiNii Articles
• Abstract License Flag: Disallowed