Ameloblast cycling patterns as measured by fluorochrome infiltration of rat incisor enamel.
Arch Oral Biol
; 40(3): 193-8, 1995 Mar.
Article
em En
| MEDLINE
| ID: mdl-7605247
ABSTRACT
Rapid modulation of maturation ameloblasts between smooth-ended and ruffle-ended forms may play an important part in the development of normal dental enamel. Previous studies of modulation rates relied upon measurements of stained or fluorescing bands on the enamel surface of whole incisors along with separate histological sections for cell-band dimensions. The present study utilized direct measurement of maturation-ameloblast bands and fluorescing regions of underlying enamel in the same histological sections, which increased the accuracy and ease with which modulation rates could be determined. Rats were injected with calcein at various times before killing and preparation of survey midsagittal sections of the lower incisors. The lengths of bands of smooth-ended ameloblasts and underlying fluorescing regions of enamel were measured throughout the maturation zone. Modulation rates were found to range from 238 microns/h (early maturation) to 91 microns/h (late maturation). Calcein diffused into enamel to varying degrees depending upon the location within the maturation stage. This new approach of direct measurement greatly facilitates the investigation of ameloblast modulation and provides additional insights into progressive structural changes in enamel during maturation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ameloblastos
/
Amelogênese
Limite:
Animals
Idioma:
En
Revista:
Arch Oral Biol
Ano de publicação:
1995
Tipo de documento:
Article
País de afiliação:
Estados Unidos