Epitélio Oral - Conceito, Classificação - Como ele é renovado! - Periodontia

sexta-feira, 17 de setembro de 2010
Postado por Odontologia Fama

Epitélio Oral - Conceito, Classificação - Como ele é renovado!

Figura 1.1

É um epitélio estratificado, queratinizado escamoso que reveste a superfície vestibular e palatina da gengiva. regiao externa da gengiva Estendes-se da junção mucogengival à margem gengival ,com exceção da superfície palatina onde comina-se com o epitélio palatino.

O epitélio oral consiste em uma camada basal , uma camada espinhosa , camada granular e uma camada cornificada.

É projetado principalmente para proteção contra injúrias mecânicas durante a mastigação. Resistência à injúria mecânica é mediada principalmente pelas numerosas junções intercelulares, principalmente os desmossomos , que se une às células e a camada córnea. A camada córnea e os espaços de intercellular relativamente estreitos também contribuem à relativa falta de permeabilidade.



Como e renovado o tecido epitelio oral?

Ela inicia da camada basal (SOFRE MITOSA E A CAMADA VAI RENOVANDO O EPITELIO, ESTRATO GERMINATIVO) Ou seja a celulas formada pela celulas mae empurram a celula mãe para regiao mais externa do epitélio e nesse caminho ela vai formando ceratinocito( Celulas sem Núcleo, mitocondrias ou seja vai perdendo organelas) até chegar superficie mais externa onde vai ser descamada.


Texto - Thierre Januth

Figura 1.1 - Disponivel em http://www.dentistadafamilia.odo.br/dicas.html

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