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Clinical Observation of Light-Cure Grass lonomer Cement with High-grade Microscope

Research Project

Project/Area Number 07672089
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionSHOWA University

Principal Investigator

TOKO Teruo  SHOWA Univ.School of Dentistry, Lecturer, 歯学部, 講師 (00155491)

Co-Investigator(Kenkyū-buntansha) HISAMITSU Hisashi  Showa Univ.School of Dentistry, professor, 歯学部, 教授 (30092430)
SUZUKI Toshimitsu  Showa Univ.School of Dentistry, assistant professor, 歯学部, 助教授 (80154558)
KOSUGI Noriko  Showa Univ.School of Dentistry, assistant, 歯学部, 助手 (10245805)
MATSUBA Hiroshi  Showa Univ.School of Dentistry, assistant, 歯学部, 助手 (90241025)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsGlass lonomer Cement / Light-cure GI-C / Digital Camera / Color compensation / Digital Image
Research Abstract

A nuber of digital imaging apparatus has been widely used in the dental field. Calibration of color balance is mandatory to utilize digital images, especially recording subtle color change by the tooth bleaching procedure. Conventional color calibration method is done by using Vita shade guide as a reference, but shade guide compensation method was some kind of try and error procedure and took a lot of time to obtain natural color images.
CasMatch (Color And Size Matching Sticker, Kyowa Tokei Co.LTD.Tokyo JAPAN) was developed for the dermatology field to process digitized photographic images on computers.
The purpose of this study was to compare the usefulness of the CasMatch and the Vita shade guide to calibrate the color balance of digital images of tooth color.
Tooth with CasMatch and series (A-D) of Vita shade guide were photographed at the magnification of 1 : 1.5 with Olympus still digital camera dental kit containing ring-flash and close-up lens.
After obtaining base line data (the angle of lens axis and object plane was 0 degree), photograph of increasing the angle from 0 to 30 by every 3 degree were taken.
Measurement were conducted on the CasMatch and on the Vita shade guide images.
The RGB image data were converted to the CIE-L^<**>a^<**>b^<**> scale and calculated delta E values. Statistical analysis by students 1st-test (p=0.05) revealed that there were no significant difference between CasMatch and Vita shade guide.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report

Research Products

(3 results)

All Other

All Publications (3 results)

  • [Publications] Teruo Toko: "Caribrating Color Balance of Digital hnages" J Dent Res 76(IADR Abst)1977. 76. 322 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Teruo Toko: "Caribrating Color Balance of Digital Images" J Dent Res 76 (IADR Abstracts 1977). Vol 76. 32292

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Teruo Toko: "Caribrating Color Balance of Digital hmages" J Dent Res 76(IADR Abst)1997. 76. 322- (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1995-03-31   Modified: 2016-04-21  

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