Comparison of teeth and dermal denticles (odontodes) in the teleost Denticeps clupeoides (Clupeomorpha)

Journal of Morphology
J Y SireFrançoise Allizard

Abstract

The present work is a contribution to an extensive comparative structural and developmental study we have undertaken to understand the evolution of the dermal skeleton in osteichthyans. We have investigated the structure of developing and functional tooth-like dermal denticles located on the head of Denticeps clupeoides, a clupeomorph, and compared their features to those of oral teeth. Morphological (scanning electron microscopy) and structural (light microscopy and transmission electron microscopy) observations clearly demonstrate that these small, sharp, conical and slightly backward-oriented denticles are true odontodes, i.e., homologous to oral teeth. They are composed of a dentine cone surrounding a pulp cavity, the top being covered by a hypermineralized cap. These odontodes are attached to a circular pedicel of attachment bone by a ligament that mineralizes, and the attachment bone matrix merges with that of the bony support. The pedicel of attachment bone surrounds a vascular cavity that is connected to the pulp cavity which is devoid of blood vessels and of nerve endings. Once the odontode is functional, the deposition of collagen matrix (called circumpulpar dentine) continues against the dentine, ligament, and attach...Continue Reading

References

May 29, 1992·Science·I J SansomM M Smith
Aug 1, 1990·Biological Reviews of the Cambridge Philosophical Society·M M Smith, B K Hall
Jan 1, 1993·Critical Reviews in Oral Biology and Medicine : an Official Publication of the American Association of Oral Biologists·A Linde, M Goldberg
Apr 16, 1998·European Journal of Oral Sciences·A Huysseune, J Y Sire

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Citations

Sep 28, 2002·Journal of Morphology·Scott A Schaefer, Uriel Angel Buitrago-Suárez
Oct 18, 2001·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·D W Stock
Aug 24, 2010·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Gareth J FraserJ Todd Streelman
Jan 18, 2019·Microscopy Research and Technique·Alaa El-Din H SayedFatma Essa
May 9, 2009·Journal of Anatomy·Jean-Yves SireMatthews K Vickaryous
Dec 20, 2002·Connective Tissue Research·A HuysseuneN Van Damme
Sep 11, 2014·Anatomical Science International·Javad SadeghinezhadAshkan Zargar
Nov 14, 2002·Microscopy Research and Technique·Philip C J Donoghue, Ivan J Sansom
May 9, 2009·Journal of Anatomy·Ann HuysseuneP Eckhard Witten

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