Light transmittance characteristics and refractive indices of light-activated pit and fissure sealants

• ARIKAWA Hiroyuki

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

• SHINOHARA Naoyuki

  Department of General Dental Practices, Medical and Dental Hospital

• TAKAHASHI Hideo

  Department of Electronics Engineering, Faculty of Engineering, Shibaura Institute of Technology

• KANIE Takahito

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

• FUJII Koichi

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

• BAN Seiji

  Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

Abstract

We examined the light transmittance characteristics and refractive indices of light-activated pit and fissure sealants. Five commercial pit and fissure sealants and human enamel were studied, along with the CIE L*a*b* color values of the materials and enamel. The light transmittance spectra of the pit and fissure sealants showed a similar trend to the enamel, especially at wavelengths below 530 nm. The average light transmittance values from 400 to 500 nm of the materials at 0.5-mm-thick ranged from 10.0% to 40.4%. The refractive indices at 589.3 nm ranged from 1.504 to 1.546, and were approximately 4−8% lower than that of enamel. The measurements for the surface hardness of materials indicate that the light-attenuating effect of enamel and the material itself reduced the polymerization efficiency of the material. For all materials, chromatic a* showed negative and b* showed positive values, as did enamel. Significant differences in light transmittance characteristics and refractive indices between the materials and enamel may affect color matching between them.

Journal

• Dental Materials Journal

  Dental Materials Journal 29 (1), 89-96, 2010

  The Japanese Society for Dental Materials and Devices

Keywords

• Pit and fissure sealant
• Light transmittance characteristics
• Refractive index

Details

• CRID: 1390282679693619200
• NII Article ID: 10025917706
• NII Book ID: AA10443149
• DOI: 10.4012/dmj.2009-042
• ISSN: 18811361
• ISSN: 02874547
• Web Site: https://www.jstage.jst.go.jp/article/dmj/29/1/29_2009-042/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2010209652
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed