histoolgy chapter 10-gingival and dentogingival junctional tissue.txt

epithelial tissue covering the alveolar process

gingiva tightly adheared to bone around the roots of the teeth

extension of attached gingiva between adjacent teeth

unattached band of tissue that encircles the neck of the tooth

gingiva that faces the tooth

interdental gingiva that is apical to the contact area-concave form-mainly seen between posterior teeth

is the most important tissue to the dental hygienist-provides a barrier to periodontal damage and disease

smae as the gingivial margin-easily seen and is an important part of the clinical exam

mostly pink-firm and immobile with stippling-width varies

fill the area between the teeth to prevent food impaction-conical in anterior and more blunted in the posterior area

similar to the attached gingiva in appearance-lacks stippling and is more mobile-.5-2mm in width

separates the attached gingiva from the marginal (free) gingiva-corresponds to the ase of the sulcus -most prominent in lower anterior and premolar areas

firm and immobile - thick layer of paarakeratinized epithelium-interface between epithelium and lamina propria is highly interdigitated

firm but moile-keratinized stratified squamous epithelium-

junction between tooth surfaces and gingival tissue

sulcular epithelium and junctional eptihelium together

narrow space between tooth and sucular epithelium-normally .5-3mm deep

fills the gingival sulcus and includes WBC and antibodies
seeps between dpithelial cells into sulcus
passes form sulcus into the oral cavity

lines the floor of the sulcus-attaches to tooth surface on enamel, cementum, or dentin

sulcular eptihelium is nonkeratinized stratified squamous epithelium

the interface between the epithelium and lamina propria is fairly smooth on this type of epithelium

differs form other types of oral epithellium in several ways
loosely packed cells with fewer desmosomal junctions
more intercellular space
increased flow of WBC from lamina propria

thinner than other tissue, but forms strong seal between gingiva and tooth surface
rapid rate of mitosis

cells remain immature
have many more organelles

RER, GOLGICOUPLEX, MITOCHONDRIA

cell renewal in dentinogingival junctional tissues

junction between the tooth surface and the gingival tissues

stands away from the tooth creates the gingival sulcus

space tht is filled with gingival fluid(crevicular fluid)

depth of the marginal tissue