perio anatomy

Question 1

parts of the periodontium

Answer 1

gingiva, cementum, pdl, alveolar bone

Question 2

3 parts of gingiva

Answer 2

free gingiva, attached gingiva, interdental papilla

Question 3

where is the FGM located?

Answer 3

2 mm coronal to CEJ

Question 4

what is also associated with the FGG

Answer 4

CEJ

Question 5

histology of the gingival sulcus

Answer 5

nnon keratinized mucosa, no CT, not attached to periosteum

Question 6

boundaries of attatched gingiva

Answer 6

FGG to MGJ

Question 7

more than Xmm is considered a pocket

Answer 7

2

Question 8

t/f. there is a MGJ on both the F and L side of the maxillary dentition

Answer 8

f. there is only attached gingiva on the hard palate (L)

Question 9

describe the size of attached gingiva max buccal

Answer 9

widest in incisors, narrowest in premolars

Question 10

describe the size of attached gingiva max ling

Answer 10

all attached, cant measure

Question 11

describe the size of the attached gingiva mand ling

Answer 11

narrowest in incisors, widest in molars

Question 12

how do you measure the width of attached gingiva

Answer 12

apical to coronal

Question 13

t/f. premorals and canines have the least amount of buccal attached gingiva

Answer 13

true.

Question 14

free and attached gingiva are keratinized or non keratinized?

Answer 14

keratinized

Question 15

3 zones of oral mucosa

Answer 15

masticatory, specialized, oral mucous membrane

Question 16

masticatory mucosa

Answer 16

tissue of hard palate and gingiva (covers alveolar process)

Question 17

specialized mucosa

Answer 17

covers dorsum of the tongue

Question 18

oral mucous membrane

Answer 18

covers the remainder of the oral cavity (not masticatory or specialized)

Question 19

recession

Answer 19

when the FGM is apical to the CEJ

Question 20

t/f. narrow gingiva has less resistance to attachment loss than wider gingiva without inflammation

Answer 20

false. narrow and wide gingiva have the same resistance to attachment loss without inflammation; therefor the amount of inflammation is more important than the amount of recession

Question 21

people with a thin phenotype have to be careful because (4 things)

Answer 21

increased recession, more vulnerable to trauma, more inflammation, less favorable Tx outcome

Question 22

connective tissue graft

Answer 22

make a flap on the hard palate and take a wedge of gingiva with ct and place it in the site of recession

Question 23

free gingival graft

Answer 23

take entire epithelium (maybe periosteum), then place it where you need it

Question 24

which is more aesthetic, free gingival graft or ct graft

Answer 24

ct graft

Question 25

what is the col

Answer 25

concavity in the interdental papilla of the contact areas of the premolar/molar region of interdental papilla

Question 26

differences of interdental gingiva in the anterior vs posterior teeth

Answer 26

ant - pyramidal | post - col

Question 27

when the distance between the crest of bone to the contact point is Xmm, a papilla will form

Answer 27

5. anything larger, the papilla will not fill in completely

Question 28

orthokeratinized

Answer 28

no nucleus

Question 29

parakeratinized

Answer 29

nuclear remnants

Question 30

layers of oral epithelium

Answer 30

basal, prickle cell (spinosum), granular (granulosum), keratinized (corneum)

Question 31

relationship of cytoplasmic tonofilaments and desmosomes to organelles from basal to granular layer

Answer 31

cytoplasmic tonofilaments and desmosomes increase while the number of organelles decrease

Question 32

cells other than keratinocytes in the oral epithelium

Answer 32

melaocytes, langerhans (immune), merkel (sensory) cells

Question 33

2 layers of basement membrane

Answer 33

``` lamina lucida (adj to basal cells) lamina densa (adj to ct) ```

Question 34

what causes the stippling appearance

Answer 34

when rete pegs fuse

Question 35

t/f rete pegs are at the JE site

Answer 35

false. there are no rete pegs at the JE

Question 36

type of epithelium at JE

Answer 36

stratified squamous non keratinized epithelium about 0.24 - 1.35mm long

Question 37

location of JE in diseased adult

Answer 37

below CEJ

Question 38

location of JE in child

Answer 38

above CEJ

Question 39

periodontitis is a result of

Answer 39

attachment loss and pocket

Question 40

how do you measure attachment loss

Answer 40

subtract 2 from probing depth (assuming 2mm is healthy length of free gingiva)

Question 41

diagnosis when someone has necrotic JE

Answer 41

NUP, seen in AIDS patients

Question 42

gingival fibers

Answer 42

circular, dentiogingival (cementum to FG), dentinoperiosteal (cementum to AG), transseptal

Question 43

width of PDL

Answer 43

0.25mm

Question 44

t/f. PDL is vascular

Answer 44

true.

Question 45

PDL fibers

Answer 45

alveolar crest, horizontal, oblique, apical

Question 46

cells of the PDL

Answer 46

fibroblasts, osteoblasts, cementoblasts, osteoclasts, epithelial cells, nerve fibers, epithelial rests of mallassez

Question 47

principle of guided tissue regeneration

Answer 47

epithelium grows faster than bone | epithelial exclusion will allow selective growth of bone and ct

Question 48

what do you use in guided tissue regeneration surgery

Answer 48

barrier membranes to prevent epithelium from growing in the space the ct is supposed to grow in

Question 49

what makes cementum different than bone tissue

Answer 49

no blood vessels, no lymph, no innervation, no remodeling

Question 50

intrinsic cemental fibers

Answer 50

produced by cementoblasts, fibers parallel to root

Question 51

extrinsic cemental fibers

Answer 51

produced by PDL fibroblasts, sharpeys fibers

Question 52

cementum at coronal/middle portion of root

Answer 52

acellular, extrinsic fiber cementum

Question 53

cementum at apical 1/3 of root and furcations

Answer 53

cellular, mixed stratified cementum

Question 54

cementum in resorption lacunae

Answer 54

cellular, intrinsic cementum

Question 55

cementum thickness in cervical portion of root

Answer 55

20 - 50um

Question 56

cementum thickness in apical portion of root

Answer 56

150 - 250um

Question 57

dental tissue that most closely resembles bone

Answer 57

cementum

Question 58

biological width

Answer 58

ct and JE

Question 59

length of biological width

Answer 59

2.04mm, round to 3

Question 60

what do you have to do if your distance from the crown margin to alveolar crest (BW) is shorter than 3mm

Answer 60

crown lengthening

Question 61

blood supply to periodontal tissues

Answer 61

dental artery, sup/inf alveolar, intraseptal, rami perforantes (terminal branches of intraseptal)

Question 62

which CN branches innervate the periodontium

Answer 62

trigeminal

Question 63

what part of embryogenesis precedes the periodontium

Answer 63

dental follicle

Question 64

what produces PDL

Answer 64

fibroblasts that are differentiated from the dental follicle, lateral to the cementum