Multiple developmental origin of the upper incisor in mouse: histological and computer assisted 3-D-reconstruction studies.
Int J Dev Biol
; 37(4): 581-8, 1993 Dec.
Article
em En
| MEDLINE
| ID: mdl-8180001
ABSTRACT
Heads of 11-15-day-old mouse embryos were cut in frontal serial sections. Early development of the maxillary incisor was analyzed using series of thick (5 and 7 microns) and semi-thin (1 micron) frontal sections and computer assisted 3-D-reconstructions of the epithelial component. The enamel organ of the mouse maxillary incisor was found to be a complex structure of multiple origin, involving several epithelial anlagen--primary dental laminae--, which could hypothetically correspond to the 5 upper incisors of early mammals. The transitory existence of at once distinct and then fusing dental primordia could reflect heterochronic changes in ontogeny which might be related to phyletic trends.
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Base de dados:
MEDLINE
Assunto principal:
Incisivo
Limite:
Animals
Idioma:
En
Revista:
Int J Dev Biol
Assunto da revista:
BIOLOGIA
/
EMBRIOLOGIA
Ano de publicação:
1993
Tipo de documento:
Article