In-air micro-proton-induced X-ray/gamma-ray emission analysis of the acid resistance of root dentin after applying fluoride-containing materials incorporating calcium

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  • YAGI Kyoko
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
  • UEMURA Reo
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
  • YAMAMOTO Hiroko
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
  • ISHIMOTO Takuya
    Division of Materials and Manufacturing Science, Osaka University Graduate School of Engineering
  • NAITO Katsuaki
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
  • ITOH Shousaku
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry
  • MATSUDA Yasuhiro
    Division of Clinical Cariology and Endodontology, Health Sciences University of Hokkaido Graduate School of Dentistry
  • OKUYAMA Katsushi
    Department of Dental Materials Sciences, Asahi University School of Dentistry
  • NAKANO Takayoshi
    Division of Materials and Manufacturing Science, Osaka University Graduate School of Engineering
  • HAYASHI Mikako
    Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry

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Description

<p>This study employed an in-air micro-proton-induced X-ray/gamma-ray emission system to assess the effectiveness of fluoride-containing materials (FCMs) incorporating calcium in preventing root caries. Dentin surfaces of human third molars were coated with one of three FCMs: fluoride-releasing glass-ionomer cement (F7) and experimental materials in which half (P1) or all (P2) of the strontium in F7 was replaced with calcium. Dentin without FCM coating served as the control. Specimens were immersed in saline at 37°C for 1 month, sectioned, and then demineralized. Calcium loss after demineralization was lower in the Ca-substituted groups than in the Ca-unsubstituted groups (p<0.05). Calcium loss was negatively correlated with fluoride uptake (p<0.01). In the F7, P1, and P2 groups, the retraction of the dentin surface was significantly suppressed as compared with the control group. FCMs incorporating calcium improved the acid resistance of root dentin and could help prevent root caries.</p>

Journal

  • Dental Materials Journal

    Dental Materials Journal 40 (5), 1142-1150, 2021-09-25

    The Japanese Society for Dental Materials and Devices

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