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1993 Fiscal Year Final Research Report Summary

Histochemical and immunohistochemical study of tooth resorption

Research Project

Project/Area Number 04454457
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Morphological basic dentistry
Research InstitutionMatsumoto Dental College

Principal Investigator

SAHARA Noriyuki  Matsumoto Dental College Dentistry Assistant Prof., 歯学部, 助教授 (70064699)

Co-Investigator(Kenkyū-buntansha) SUZUKI Kazuo  Matsumoto Dental College Dentistry Professor, 歯学部, 教授 (30064653)
Project Period (FY) 1992 – 1993
KeywordsTooth / Resorption / Human / Histochemistry / Immunohistochemistry / Deciduous Teeth
Research Abstract

Histochemical and immunohistochemical observations of more than 150 extracted human deciduous teeth revealed that, prior to shedding, odontoclastic resorption as a rule takes place at the pulpal surface of cornal dentin. We also found that this phenomenon occures in all kinds of deciduous teeth. The process of this internal resorption of coronal dentin of deciduous teeth clearly showed time-related histological changes. When root resorption neared completion, inflammatory cells started to gradually infiltrate into the pulp, and odontoclasts began to degenerate. After that, multinucleate odontoclasts appeared, and resorption proceeded from the predentin to the dentin. The odontoblastic activity was initially detected only on the pulpal surface at the bottom areas of the crown. It gradually spread towards the pulpal horn regions along the wall of the pulp chamber. However, this internal resorption of cornal dentin did not continue until the teeth were finally shed. After elimination of resorption, the resorbed surface was repaired by a cementum-like deposition or covered with connective tissues.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] N.Sahara et al: "Odontoclastic Resorption at the Pulpal Surface of Coronal Dentin Prior to the Shedding of Human Deciduous Teeth" Arch.Histol.Cytol.55. 273-285 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sahara et al: "A histological study of the exfaliation of human deciduous teeth" J.Dental Res.72. 634-640 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sahara et al: "Cementum-like tissue deposition on the resorbed pulp chamber wall of human deciduous teeth prior to shedding" Acta Anatomica. 147. 24-34 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sahara et al: "Resorption and repair of human deciduous teeth:mononuclear phagocytic cells on the resorbed dentin surface in the transitional phase between resorption and repair" Dentistry in Japan. 30. 14-21 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sahara et al: "Odontoclastic resorption of the superficial nonmineralized layer of predentine in the shedding of human deciduous teeth" Cell Tissue Res. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sahara et al.: "Odontoclastic Resorption at the pulpal surface of Coronal Dentin prior to the Shedding of Human Deciduous Teeth." Arch. Histol. Cytol.55. 273-285 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Sahara et al.: "A histological study of the exfoliation of human deciduous teeth." J.Dental Res.72. 634-640 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Sahara et al.: "Cementum-like tissue deposition on the resorbed pulp chamber wall of human deciduous teeth." Acta Anatomica. 147. 24-34 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Sahara et al.: "Resorption and repair of human deciduous teeth : mononuclear phagocytic cells on the resorbed dentin surface in the transitional phase between resorption and repair." Dentistry in Japan. 30. 14-21 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Sahara et al.: "Odontoclastic resorption of the surperficial nonmineralized layr of predentine in the shedding of human deciduous teeth." Cell Tissue Res.In press. (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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