L1: periodontium

Question 1

what constitutes the masticatory mucosa , specialized mucosa , and lining mucosa?

Answer 1

masticatory :gingiva and mucosa covering hard palate
(keratinized , comes in contact with food)

specialized mucosa : dorsum mucosa of the tongue

lining mucosa: remaining parts of oral mucous membrane

Question 2

functions of periodontium :

Answer 2

attach teeth to alveolar bone , maintain surface integrity of masticatory mucosa in mouth

Question 3

connective tissue fibers are produced by _____ and can be divided into _____

Answer 3

1.) fibroblasts

2.)
collagen fibers , reticulin fibers
oxytalan fibers
elastic fibers

Question 4

collagen fiber types:

Answer 4

1.) circular fibers : run in FREE GINGIVA and encircle tooth , fixes gingiva in place

2.)dentogingival fibers

3.)dentoperiosteal fibers: run apically over the facial and lingual bone crest and terminate in the tissue of the attached gingiva

4.) transseptal fibers

Question 5

what cells are present in the gingiva ?

Answer 5

1.) langerhans cells: defense

2.) melanocytes: dendritic cells located in the basal and spinous layers of the gingival epithelium . synthesizes melanin in granules called premelanosomes or melanosomes

3.) merckel cells: harbor nerve endings and are identified as tactile preceptors

Question 6

epithelium of COL area :

Answer 6

non keratinbized , like junctional epithelium

Question 7

what is the periodontal attachment apparatus ?

Answer 7

periodontal ligament , root cementum , and alveolar bone

Question 8

healthy gingiva should be in what position in relation to CEJ.

Answer 8

equigingival or 1.5mm above CEJ

Question 9

Normal depth of gingival sulcus?

Answer 9

0-3mm

Question 10

list the non-keratinized gingiva :

Answer 10

-junctional epithelium , interdental col area

Question 11

what are the advantages and disadvantages of not having keratinized epithelium ?

Answer 11

disadvantage: higher chance of periodontal disease because bacteria can easily enter .

advantage : allows ciricular fluid to come with defense mechanism GCF

Question 12

VIisual manifestation of transition from free gingiva to attached gingiva is known as/

Answer 12

gingival groove

Question 13

interdental papilla is only present when there is contact between adjasent teeth

Question 14

types of collagen fibers present ?

Answer 14

type 1(70%)
type 2 (30%)

elasticity increases during aging

Question 15

width of attached gingiva is greatest in___

Answer 15

the maxillary incisor area :3.5-4.5mm

in the mandibular incisors:3.3-3.9mm

in maxillary premolar area:1.9mm

in mandibular p0remolar area :1.8mm

Question 16

what is the significance of the attached gingiva;

Answer 16

protects periodontium from injury caused by frictional forces encountered during mastication and dissipate the pull on the gingival margin created by the muscles of the adjacesnt alveolar mucosa