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Amounts of Sr and Ca Eluted from Deciduous Enamel to Artificial Saliva Related to Dental Caries

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Abstract

This study was performed to elucidate the relationship between dental caries and the levels of Sr and Ca eluted from enamel, and to examine whether these elements are useful as factors to assess caries risk. The available 103 (Sr) and 108 (Ca) samples were obtained among 111 collected deciduous teeth. The healthy regions of enamel were decalcified in artificial saliva at pH 6.2 and 5.5. The eluted levels of these elements from enamel were determined using atomic absorption spectrophotometry. Sr and Ca levels were not affected by the sex nor tooth type. Sr levels of the caries-experienced tooth (CE) group were 2.6-fold (pH 6.2) and 2.2-fold (pH 5.5) higher than those of the sound tooth (ST) group, respectively. Furthermore, the Sr levels were significantly higher in the teeth with treated than in those with untreated caries. Only at pH 6.2 was a significant difference found in Ca levels between the ST and CE groups. In the ST group, at pH 5.5, both the Sr and Ca levels significantly increased when the children had six or more carious teeth. The Sr and Ca elution levels were significantly inhibited in the teeth receiving fluoride application every 3 or 4 months compared to those that were not. These findings indicate that Sr can be an indicator of the acid resistance of teeth, and a useful factor to assess future caries risk.

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Acknowledgments

We express profound appreciation to Dr. Hisae Moritaka, Dr. Toshiaki Hashimoto, and Dr. Yasuhiro Sorada for cooperation in collecting deciduous teeth. We also thank the subjects and their parents for their cooperation in this study.

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Authors and Affiliations

  1. Division of Developmental Stomatognathic Function Science, Department of Growth and Development of Functions, Kyushu Dental College, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu City, 803-8580, Japan

    Ayaka Enomoto & Kenshi Maki

  2. Division of Multidisciplinary Studies, Department of Biosciences, Kyusyu Dental College, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu City, 803-8580, Japan

    Toshiko Tanaka & Shigenori Kawagishi

  3. Division of Surgery, Development of Control of Physical Functions, Kyushu Dental College, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu City, 803-8580, Japan

    Hideaki Nakashima

  4. Division of Pediatric Dentistry, Department of Human Development and Fostering, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado City, 350-0283, Japan

    Koji Watanabe

Authors
  1. Ayaka Enomoto
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  2. Toshiko Tanaka
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  3. Shigenori Kawagishi
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  4. Hideaki Nakashima
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  5. Koji Watanabe
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  6. Kenshi Maki
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Correspondence to Toshiko Tanaka.

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Enomoto, A., Tanaka, T., Kawagishi, S. et al. Amounts of Sr and Ca Eluted from Deciduous Enamel to Artificial Saliva Related to Dental Caries. Biol Trace Elem Res 148, 170–177 (2012). https://doi.org/10.1007/s12011-012-9368-y

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  • DOI: https://doi.org/10.1007/s12011-012-9368-y

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