Theoretical Study on the Mechanism of Dentin Hardness Measurement Using a Tooth Hardness Measuring Device with a Light-Emitting Diode

DOI Web Site 23 References Open Access
  • Kondo Sota
    Osaka University, Graduate School of Engineering, Division of Sustainable Energy and Environmental Engineering
  • Tomioka Yutaka
    National Cancer Center Hospital East, Department for the Promotion of Medical Device Innovation
  • Fujimoto Naohiro
    Osaka University, Graduate School of Engineering, Division of Sustainable Energy and Environmental Engineering
  • Mine Atsushi
    Osaka University Graduate School of Dentistry, Department of Fixed Prosthodontics and Orofacial Function
  • Yamaguchi Satoshi
    Osaka University Graduate School of Dentistry, Department of Dental Biomaterials
  • Okumura Saeko
    Osaka Dental University, Department of Operative Dentistry
  • Tanimoto Hiroaki
    Osaka Dental University, Department of Operative Dentistry
  • Yasuo Kenzo
    Osaka Dental University, Department of Operative Dentistry
  • Yoshikawa Kazushi
    Osaka Dental University, Department of Operative Dentistry
  • Yamamoto Kazuyo
    Osaka Dental University, Department of Operative Dentistry
  • Hazama Hisanao
    Osaka University, Graduate School of Engineering, Division of Sustainable Energy and Environmental Engineering

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Other Title
  • LEDを用いた歯質硬さ測定装置における象牙質硬さ測定メカニズムの理論的検討

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<p>A study was conducted on the mechanism of dentin hardness measurement using a tooth hardness measuring device with a light-emitting diode, which is being developed as a new method for diagnosing root caries. The theoretical formulas for the dark area (the projected area of contact between the indenter and the dentin when the indenter is pressed into the dentin), the measured values and the indentation area were compared, and the physical interpretation of the dark area was performed. The results showed that the actual dark areas included the effect of exuded water from dentin in addition to the dentin deformation. Furthermore, it was noted that the result indicated that the indentation areas were smaller compared to the dark areas due to the elastic recovery.</p>

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