Document Detail

Tooth ontogeny in the upper jaw and tongue of the rainbow trout (Salmo gairdneri).
MedLine Citation:
PMID:  282289     Owner:  NLM     Status:  MEDLINE    
Tooth development has been studied in the upper jaw and tongue of a series of rainbow trout embryos (Salmo gairdneri). The sequence of tooth ontogeny in the maxillary bone differs significantly from that seen in the premaxillary bone. In the maxillary bone the teeth developed in an almost perfect alternating sequence from front to back, the teeth occupying the odd-numbered tooth positions developing ahead of those occupying the even-numbered tooth positions. However an alternating sequence was not encountered in the premaxillary bone of the rainbow trout where, from tooth position 4, teeth developed in sequence, and at approximately the same rate, in both directions. The significance of this difference was discussed. The teeth on the tongue developed in an alternating sequence, the fourth tooth developing first followed by the second tooth. The teeth in positions one, three and five later developed simultaneously. Evidence was presented which indicated that resorption of a tooth may commence from its pulpal surface in association with the appearance of multinucleated giant cells and not from the external surface in relation to a successional tooth. This was particularly so in the case of lingual teeth where the successor was laterally positioned or in midline teeth which lacked successional teeth.
B K Berkovitz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal de biologie buccale     Volume:  6     ISSN:  0301-3952     ISO Abbreviation:  J Biol Buccale     Publication Date:  1978 Sep 
Date Detail:
Created Date:  1979-03-24     Completed Date:  1979-03-24     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0400336     Medline TA:  J Biol Buccale     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  205-15     Citation Subset:  D; IM    
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MeSH Terms
Dental Enamel / anatomy & histology
Dental Pulp / anatomy & histology
Maxilla / physiology*
Mesoderm / anatomy & histology
Salmonidae / physiology*
Tongue / physiology*
Tooth / physiology*
Tooth Germ / anatomy & histology
Tooth Resorption / physiopathology
Trout / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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