Three-Dimensional Microstructural Observation of Rat Incisor Odontoblast and Dentin

DOI 12 References
  • Miake Yasuo
    Department of Ultrastructural Science, Oral Science Center, Tokyo Dental College
  • Moriguchi Mitsuko
    Department of Ultrastructural Science, Oral Science Center, Tokyo Dental College
  • Yamazaki Takaki
    Department of Ultrastructural Science, Oral Science Center, Tokyo Dental College
  • Hiruma Nobuhiko
    Department of Ultrastructural Science, Oral Science Center, Tokyo Dental College
  • Ishikawa Toshiki
    Department of Ultrastructural Science, Oral Science Center, Tokyo Dental College

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  • ラット切歯象牙芽細胞と象牙質の立体的微細構造の観察

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Abstract

The three-dimensional structure of the odontoblastic organelle and the alignment of collagen fibers in predentin and dentin were observed by scanning electron microscopy (SEM) using pultaceous treatment (AODO method). The structure of the nuclear membrane and transitional images from granular endoplasmic reticulum (rER) to transport vesicles and clear surface of Golgi apparatus unobtainable with transmission electron microscopy (TEM) were observed. Cross-sections of the rER system and tubular mitochondria revealed configurations similar to those usually described in TEM studies. There were a large number of ribosomes on the surface of the rER. A fibrous structure which maintained an appropriate distance between the various elements of the rER was also observed. The alignment of the dentin collagen fibers accorded with TEM images, but the alignment of the collagen fibers in predentin did not, with many fibers arranged horizontally.

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