Historadiographic Observations on the Outer Dentin in Certain Osseous Fishes

Isokawa, Sohiti; Satomura, Ichiro; Yamaguchi, Kanako; Yoshie, Tamotsu; Morimoto, Motoi

doi:10.2334/josnusd1959.12.1

Cited by 9 publications

(2 citation statements)

References 2 publications

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“…The behavior of fluorescence seen in outer dentin is similar to that seen in enameloid and, according to SATOMURA [19] and ISOKAWA et al [20], histologic findings of outer dentin are closer to dentin than enameloid.…”

Section: Discussionsupporting

confidence: 59%

Study on the Developing Enameloid of a Fish (Hoplognathus fasciatus)

Toda

Hasegawa

Kodama

et al. 1970

The Journal of Nihon University School of Dentistry

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Section: Discussionsupporting

confidence: 59%

Study on the Developing Enameloid of a Fish (Hoplognathus fasciatus)

Toda

Hasegawa

Kodama

et al. 1970

The Journal of Nihon University School of Dentistry

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“…Collar enameloid is homologous to cap enameloid [9,10] and corresponds to the outer dentin [11], the radial fibrillation part of the collar durodentin [12] and the collar ganoine [13]. Collar enamel, on the other hand, is homologous to ectodermal enamel [3] (monotypic enamel [4,14]).…”

Section: Extant Lepisosteus Possesses Collar Enamelmentioning

confidence: 99%

Fine structure and development of the collar enamel in gars, Lepisosteus oculatus, Actinopterygii

Sasagawa

Ishiyama

Yokosuka

et al. 2008

Front. Mater. Sci. China

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The fine structure of collar enamel and the cells constituting the enamel organ during amelogenesis in Lepisosteus oculatus was observed by light, scanning electron and transmission electron microscopy. In the enamel, slender crystals were arranged perpendicular to the surface and the stripes that were parallel to the surface were observed, suggesting that the enamel in Lepisosteus shares common morphological features with that in sarcopterygian fish and amphibians. Ameloblasts containing developed Golgi apparatus, rough endoplasmic reticulum (rER) and secretory granules were found in the secretory stage. In the maturation stage, a ruffled border was not seen at the distal end of the ameloblasts, while many mitochondria and lysosome-like granules were obvious in the distal cytoplasm. The enamel organ consisted of the outer dental epithelial cells, stratum reticulum cells and ameloblasts, but there was no stratum intermedium. It is likely that the ameloblasts have less absorptive function in comparison with the inner dental epithelial cells facing cap enameloid.

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Ultrastructure of the dental epithelium and odontoblasts during enameloid matrix deposition in cichlid teeth

Prostak

Skobe

1986

Journal of Morphology

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Teleost enameloid matrix has been proposed to be an ectodermal, mesodermal, or joint ectodermal-mesodermal product. To determine its origin we examined the ultrastructure of the inner dental epithelium (IDE), odontoblasts, enameloid, and dentin matrices of cichlid tooth buds at the stage of enameloid formation. © Alan R. Liss, Inc. Columnar IDE cells had apical and basal terminal webs and contained organelles associated with protein synthesis, including elongated secretory granules containing fibrillar material having cross-striations with 60-nm periodicity. The morphology of IDE secretory granules was typical of procollagen granules observed in a large variety of ectodermal and mesodermal cells synthesizing collagen. In contrast, the paucity of secretory granules within three odontoblast types indicates that these cells probably do not synthesize enameloid matrix. These observations are consistent with the idea that the bulk of the enameloid matrix is itself an ectodermal collagen synthesized and secreted by IDE cells.

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Historadiographic Observations on the Outer Dentin in Certain Osseous Fishes

Cited by 9 publications

References 2 publications

Study on the Developing Enameloid of a Fish (Hoplognathus fasciatus)

Study on the Developing Enameloid of a Fish (Hoplognathus fasciatus)

Fine structure and development of the collar enamel in gars, Lepisosteus oculatus, Actinopterygii

Ultrastructure of the dental epithelium and odontoblasts during enameloid matrix deposition in cichlid teeth

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