Ultrastructure of developing tooth plates in the Australian lungfish, Neoceratodus forsteri (Osteichthyes : Dipnoi)

Kemp, Anne (2003) Ultrastructure of developing tooth plates in the Australian lungfish, Neoceratodus forsteri (Osteichthyes : Dipnoi). Tissue & Cell, 35 6: 401-426. doi:10.1016/S0040-8166(03)00066-1


Author Kemp, Anne
Title Ultrastructure of developing tooth plates in the Australian lungfish, Neoceratodus forsteri (Osteichthyes : Dipnoi)
Journal name Tissue & Cell   Check publisher's open access policy
ISSN 0040-8166
Publication date 2003-12
Sub-type Article (original research)
DOI 10.1016/S0040-8166(03)00066-1
Volume 35
Issue 6
Start page 401
End page 426
Total pages 26
Place of publication Edinburgh, Scotland
Publisher Churchill Livingstone
Collection year 2003
Language eng
Subject C1
270503 Animal Anatomy and Histology
780105 Biological sciences
Abstract While the lungfish dentition is partially understood as far as morphology and light microscopic structure is concerned, the ultrastructure is not. Each tooth plate is associated with a dental lamina that develops from the inner layer of endodermal cells that form the oral epithelium. Dentines, bone and cartilage of the jaws differentiate from mesenchyme cells aggregating beneath the oral endothelium. Enamel, in the developing and in the mature form, has similarities to that of other early vertebrates, but unusual characters appear as development proceeds. Ameloblasts are capable of secreting enamel, and, with mononuclear osteoclasts, of remodelling the bone below the tooth plate. The forms of dentine, all based largely on an extracellular matrix of collagen and mineralised with biological apatite, differ from each other and from the underlying bone in the ultrastructure of associated cells and in the mineralised extracellular matrices produced. Cell processes emerging from the odontoblasts and from the osteoblasts vary in length, degree of branching and of anastomoses between the processes, although all of the cell types have large amounts of rough endoplasmic reticulum. Mineralisation of the extracellular matrices varies among the enamel, dentines and bone in the tooth plate. In addition, the development of the hard tissues of the tooth plates indicates that many of the similarities in fine structure of the dentition in lungfish, to tissues in other fish and amphibia, apparent early in development, disappear as the dentition matures. (C) 2003 Elsevier Ltd. All rights reserved.
Keyword Anatomy & Morphology
Cell Biology
Lungfish Dentition
Enamel
Dentine
Bone
Ultrastructure
Ontogeny
Ambystoma-mexicanum
Fine-structure
Teeth
Vertebrates
Amelogenin
Dentition
Amphibia
Tissues
Fish
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2004 Higher Education Research Data Collection
Centre for Microscopy and Microanalysis Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 17 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 14 Aug 2007, 19:25:33 EST