Scanning Electron Microscopic Views of Tubular Enamel in a Fish (Samicosssyphus reticulatus)

Isokawa, Sohiti; Kodama, Nobuyuki; Katsumata, Atsuyoshi; Hasegawa, Tomiyoshi; Hasegawa, Iwao; Yamakawa, Hiroshi

doi:10.2334/josnusd1959.10.136

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…The directional arrangement of fibers in enameloid corresponded with the descriptions given by ISOKAWA and his colleagues with repect to those seen in porgy [10,11], file-fish [12] and Samicossayphus [13,14].…”

Section: Discussionsupporting

confidence: 83%

“…KVAM [8,9] showed that the fibers forming the organic matrix of enameloid of fish teeth were of mesodermal origin. Others [7,[10][11][12][13][14] have observed collagen fibers forming the organic matrix of enameloid of Hoplognathus fasciatus and in the teeth of several other osseous fishes. Moreover, these fibers appeared to be intimately related with odontoblasts.…”

Section: Discussionmentioning

confidence: 99%

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Tooth Enameloid Formation of a Fish (Hoplognathus fasciatus)

Isokawa

Yoshida

Ikeda

et al. 1972

The Journal of Nihon University School of Dentistry

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Tooth Enameloid Formation of a Fish (Hoplognathus fasciatus)

Isokawa

Yoshida

Ikeda

et al. 1972

The Journal of Nihon University School of Dentistry

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“…Since first being observed in the marsupialia by Tomes (1849), tubular enamel has been reported in some fish (Ockerse, 1961;Isokawa et al, 1959Isokawa et al, , 1964Isokawa et al, , 1968. There are many pores on the surface of the tubular enamel in fish.…”

Section: Discussionmentioning

confidence: 97%

Structure of the upper teeth of the filefish, Stephanolepis cirrhifer

Uehara

Miyoshi

1987

Anat. Rec.

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The teeth of the filefish were investigated with light and scanning electron microscopy. Anterior and posterior rows of pleurodont teeth are present in the maxilla. The teeth in the anterior row possess a large labial and small lingual surface and the teeth in the posterior row possess a small labial and large lingual surface. The enameloid consists of three layers-the outer, middle, and inner layer. The outer layer consists of fine, parallel crystallites oriented perpendicular to the surface. They are similar to the crystallites in enamel derived from ectoderm. In the middle layer the crystallites form parallel bundles that are oriented in the same direction as that of the crystallites in the outer layer. In the inner layer bundles of crystallites interlace with each other. The tubular structures and the terminal branches of the dentinal tubules are located among the crystallites in the inner layer. In the dentine numerous dentinal tubules radiate from the pulp cavity toward the periphery and are seen to curve slightly in an S-shaped course. At the occlusal tip the alternating parabolic layers are seen and these are considered to be mineralized lines. The openings of the dentinal tubules are round or oval, surrounded by interlacing fibrils. The teeth are tightly fixed to the jawbone by bundles of fibrils. At the lower part of the lingual surface of the teeth in the anterior row and the labial surface of the teeth in the posterior row the bundles of fibrils start at the dentine and some fibrils run through connective tissue, while others terminate in projections of the jawbones.(ABSTRACT TRUNCATED AT 250 WORDS)

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Structure of comblike teeth of the ayu sweetfish, Plecoglossus altivelis (Teleostei: Isospondyli): I. Denticles and tooth attachment

Uehara

Miyoshi

1993

Journal of Morphology

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The structure and tooth attachment of the comblike teeth and denticles of the ayu sweetfish, Plecoglossus altivelis, were examined by light and scanning electron microscopy. The denticle is composed of a spoonlike crown with a spine pointed anteriorly, a triangular plate in the cervical region, and a root that curves laterally and tapers off to a point. The root apex is fused with a long thin pedicle that turns abruptly anteriad toward the jaw bone. Planes of the spine, the spoonlike crown, the triangle plate and the root of the denticle are varied, and the denticle is twisted in the region of the triangle plane. The superficial layer of the dentine is homogeneously calcified and is considered to be enameloid, because some of the inner dentinal epithelial cells in the tooth germ are columnar and possess cellular processes at their apical ends. The dentine is fibrous and fine dentinal tubules are visible in dentine treated with sodium hydroxide and observed by scanning electron microscopy. The upper half of the root is surrounded by a dense layer of collagen fibers running parallel to the tooth axis, and the lower half is encompassed by interlaced collagen fibers. The lower part of the root is open on its lingual side. The pedicle is a long rod which is homogeneously calcified and enmeshed by interlaced collagen fibers, and it curves mediad as it nears the jaw bone. The pedicles are interposed between a layer of gelatinous connective tissue and the jaw bone and terminate on the periosteum. Comparative aspects of ayu tooth morphology are discussed. © 1993 Wiley-Liss, Inc.

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Scanning Electron Microscopic Views of Tubular Enamel in a Fish (Samicosssyphus reticulatus)

Cited by 6 publications

References 3 publications

Tooth Enameloid Formation of a Fish (Hoplognathus fasciatus)

Tooth Enameloid Formation of a Fish (Hoplognathus fasciatus)

Structure of the upper teeth of the filefish, Stephanolepis cirrhifer

Structure of comblike teeth of the ayu sweetfish, Plecoglossus altivelis (Teleostei: Isospondyli): I. Denticles and tooth attachment

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