Perio Test 1 Flashcards
Where do cells from the periodontia arise from?
Neural crest (neural tube)
Which structure gives rise to the periodontia?
Dental Follicle
Which type of cell remains in mature periodontia to participate in turnover? Where are the cells located?
Ectomesencymal cells, they are present in the PDL
Which structure provides contact between the gingiva and the tooth?
Junctional epithelium, is it attached to the tooth
What patterns are seen in attached gingiva width?
Width varies.
It increases with age
Widest in incisors, narrowest in premolars
Mandibular lingual is the narrowest in incisors and widest in molars
What is the mucogingival junction, what kind of tissue is it?
Junction between the attached gingiva and alveloar mucosa. Made up of keritinized tissue
Why is there no mucogingival junction in the palate?
Only keritinized tissue is present there.
What is the col and what kind of tissue is it?
Concavity in contact areas of premolar/molar region
Non-keratinized epithelium
What is the origin of the junctional epithelium during tooth eruption?
Reduced dental epithelium
What is the origin of junctional epithelium after tooth eruption?
Cells of the oral epithelium. (can differentiate into cells of JE)
What is attachment loss?
In periodontitis junctional epithelium migrates apically down root surface
What are circular gingival fibers?
Encircle tooth like a cuff
What are dentogingival fibers?
Fan up from supra-crestal cementum into free gingiva
What are dentoperiosteal fibers?
Fan down from supra-crestal cementum into attached gingiva
What are transseptal fibers?
Run from tooth to tooth, embedded in cementum
