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  • 1965-1969  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Volume fraction analysis of human coronal dentin (1969)
    Springer
    Calcified tissue international 4 (1969), S. 257-259 
    Details
    ISSN: 1432-0827
    Keywords: Teeth ; Dentin ; Tubules ; Sclerosis ; Microradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Une méthode systématique de comptage par points a été utilisée pour déterminer le volume respectif de la dentine humaine coronaire péricanaliculaire et intercanaliculaire. Contrairement à l'opinion classique, il apparait que la dentine péricanaliculaire constitute une partie relativement importante de la dentine humaine coronaire, surtout au niveau de la moitié interne de la dentine. Dans cette couche, les proportions relatives des deux constitutants sont sensiblement égales.
    Abstract: Zusammenfassung Einc systematische Punktzählmethode wurde angewendet, um die Fraktionen der peritubulären Matrix im menschlichen Dentin der Zahnkrone volumetrisch auszuwerten. Entgegen der früheren Annahme zeigte es sich, daß das peritubuläre Dentin eine relativ große Fraktion des Dentins der Zahnkrone ausmacht; dies war besonders in der inneren Hälfte vom Dentin der Fall, wo die relativen Volumen der beiden Matrices ungefähr gleich groß waren.
    Notes: Abstract A systematic point-count method was utilized to determine the volume fractions of peritubular and intertubular matrix in human coronal dentin. Contrary to previous thought, it was found that peritubular dentin represents a relatively large fraction of human coronal dentin, particularly in the inner one-half of the dentin, where the relative volumes of the two matrices were approximately equal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279128
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  • 2
    Electronic Resource
    Electronic Resource
    Optical and radiographic appearance of thin ground sections of dentin (1967)
    Springer
    Calcified tissue international 1 (1967), S. 319-323 
    Details
    ISSN: 1432-0827
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Des microradiographies de coupes minces minéralogiques de canalicules dentinaires, en coupe transversale, sont comparées a vec les aspects de ces mêmes canalicules en microscopie optique. Les anneaux clairs, visibles autour des canalicules en microscopie à lumière transparentc, en effectuant la mise au point sur la partie supérieure de la coupe, ne peuvent être mis en parallèle avec la zone péricanaliculaire — ces anneaux sont visibles dans la dentine d'incisive de rat, qui ne contient pas de matrice péricanaliculaire. Il semble donc que des coupes par usure, observée en lumière transparente classique, ne permettent pas d'identifier la zone péricanaliculaire.
    Abstract: Zusammenfassung Röntgenmikrographien von quergetroffenen Zahnbeinkanälchen in Schliffschnitten wurden mit gewöhnlichen lichtmikroskopischen Bildern verglichen. Die hellen Ringe, welche im gewöhnlichen lichtmikroskopischen Bild erscheinen, wenn das Mikroskop über die obere Schnittfläche eingestellt wird, konnten nicht mit einer röntgenmikrographisch dargestellten peritubulären Zone verglichen werden. Diese Ringe konnten im Zahnbein von Rattenschneidezähnen, die keine peritubuläre Zone besitzen, dargestellt werden. Es wurde festgestellt, daß die im gewöhnlichen Licht beobachteten Schliffschnitte nicht für die Herstellung der peritubulären Zonen geeignet sind.
    Notes: Abstract Microradiograms of thin ground sections of transversely cut dentinal tubules were compared to the light microscopic images of the ground sections. The bright rings seen around tubules viewed by ordinary transmitted light with the objective focused on the upper surface of the section could not be related to a radiographically demonstrable peritobular zone. These rings could be produced in rat incisor dentin which does not have peritubular matrix. It was concluded that ground sections viewed with ordinarily transmitted light could not be validly used to determine the presence of peritubular matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008103
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  • 3
    Electronic Resource
    Electronic Resource
    Apparently hypermineralized perilacunar bone an artefact in microradiographs (1968)
    Springer
    Calcified tissue international 2 (1968), S. 177-182 
    Details
    ISSN: 1432-0827
    Keywords: Microradiography ; Bone ; Dentin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Les couches de matrice osseuse entourant les lacunes des osteocytes qui sont apparemment hypermineralisees (radioopaques), peuvent etre eliminees des microradiographies au moyen d'une agitation continue au cours de developpement. Il en va de meme des bordures radioopaques situees le long des felures artificielles dans les coupes. Les structures reellement hypermineralisees, telles que la dentine peritubulaire, les lignes cementantes es les bords internes des osteones ne sont pas modifiees par le traitement.
    Abstract: Zusammenfassung Das Auftreten einer hypermineralisiert erscheinenden Schicht von Knochengewebe um die Knochenhoehlchen, aber auch dasjenige von dichter erscheinenden Rändern an künstlich erzeugten Spalten in den Gewebsschnitten, konnte verhindert werden durch stetiges Agitieren während der Entwicklung der Historadiogramme. Dagegen hatte die gleiche Behandlung keinen Einfluß auf das Sichtbarbleiben anderer, wirklich hypermineralisierter Gebilde, z. B. der Ränder der Zahnbeinkanälchen, Knochenkittlinien, und Binnensäume von Osteonen.
    Notes: Abstract Apparently hypermineralized (radiopaque) layers of bone matrix surrounding osteocyte lacunae, as well as radiopaque edges along artificial cracks in the sections, could be eliminated from microradiographs by continuous agitation during development. Other hypermineralized structures, such as peritubular dentin, cementing lines and the inner edges of osteons, persisted and were not artefacts of development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279206
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  • 4
    Electronic Resource
    Electronic Resource
    The distribution of peritubular matrix in human coronal dentin (1968)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 126 (1968), S. 435-445 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Thin semi-serial ground sections of coronal dentin were examined radiographically. The bulk of the coronal dentin was characterized by the majority of the tubules having a distinct peritubular zone. With the exception of the tubules running from the tip of the cusp to the pulp cornu, the bulk of peritubular matrix forming the walls of the tubules was disposed eccentrically. The matrix was thicker on the cervical sides of the tubule than it was on the incisal sides. In a relatively narrow layer of the coronal dentin between the bulk of the dentin and the predentindentin border area the thickness of the peritubular matrix varied considerably. It was extremely narrow or absent in some tubules and reached its greatest thickness in others. The tubules in the predentin border area showed little or no evidence of peritubular matrix. The area of dentin beneath the central developmental groove differed somewhat from the bulk of the dentin. Many of the tubules at all levels of this area showed little radiographic evidence of peritubular matrix. Obliterated tubules were seen in some of the sections taken immediately above the predentin-dentin border area in the region of the pulp cornu and were always seen at the junction of the mantle dentin and the circumpulpal dentin beneath the central developmental groove.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051260405
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