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DMD6350 - perio > perio anatomy > Flashcards

perio anatomy Flashcards

1
Q

parts of the periodontium

A

gingiva, cementum, pdl, alveolar bone

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2
Q

3 parts of gingiva

A

free gingiva, attached gingiva, interdental papilla

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3
Q

where is the FGM located?

A

2 mm coronal to CEJ

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4
Q

what is also associated with the FGG

A

CEJ

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5
Q

histology of the gingival sulcus

A

nnon keratinized mucosa, no CT, not attached to periosteum

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6
Q

boundaries of attatched gingiva

A

FGG to MGJ

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7
Q

more than Xmm is considered a pocket

A

2

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8
Q

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

A

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

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9
Q

describe the size of attached gingiva max buccal

A

widest in incisors, narrowest in premolars

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10
Q

describe the size of attached gingiva max ling

A

all attached, cant measure

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11
Q

describe the size of the attached gingiva mand ling

A

narrowest in incisors, widest in molars

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12
Q

how do you measure the width of attached gingiva

A

apical to coronal

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13
Q

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

A

true.

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14
Q

free and attached gingiva are keratinized or non keratinized?

A

keratinized

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15
Q

3 zones of oral mucosa

A

masticatory, specialized, oral mucous membrane

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16
Q

masticatory mucosa

A

tissue of hard palate and gingiva (covers alveolar process)

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17
Q

specialized mucosa

A

covers dorsum of the tongue

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18
Q

oral mucous membrane

A

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

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19
Q

recession

A

when the FGM is apical to the CEJ

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20
Q

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

A

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

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21
Q

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

A

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

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22
Q

connective tissue graft

A

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

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23
Q

free gingival graft

A

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

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24
Q

which is more aesthetic, free gingival graft or ct graft

A

ct graft

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25
Q

what is the col

A

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

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26
Q

differences of interdental gingiva in the anterior vs posterior teeth

A

ant - pyramidal

post - col

27
Q

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

A
  1. anything larger, the papilla will not fill in completely
28
Q

orthokeratinized

A

no nucleus

29
Q

parakeratinized

A

nuclear remnants

30
Q

layers of oral epithelium

A

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

31
Q

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

A

cytoplasmic tonofilaments and desmosomes increase while the number of organelles decrease

32
Q

cells other than keratinocytes in the oral epithelium

A

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

33
Q

2 layers of basement membrane

A 
lamina lucida (adj to basal cells)
lamina densa (adj to ct)
34
Q

what causes the stippling appearance

A

when rete pegs fuse

35
Q

t/f rete pegs are at the JE site

A

false. there are no rete pegs at the JE

36
Q

type of epithelium at JE

A

stratified squamous non keratinized epithelium about 0.24 - 1.35mm long

37
Q

location of JE in diseased adult

A

below CEJ

38
Q

location of JE in child

A

above CEJ

39
Q

periodontitis is a result of

A

attachment loss and pocket

40
Q

how do you measure attachment loss

A

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

41
Q

diagnosis when someone has necrotic JE

A

NUP, seen in AIDS patients

42
Q

gingival fibers

A

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

43
Q

width of PDL

A

0.25mm

44
Q

t/f. PDL is vascular

A

true.

45
Q

PDL fibers

A

alveolar crest, horizontal, oblique, apical

46
Q

cells of the PDL

A

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

47
Q

principle of guided tissue regeneration

A

epithelium grows faster than bone

epithelial exclusion will allow selective growth of bone and ct

48
Q

what do you use in guided tissue regeneration surgery

A

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

49
Q

what makes cementum different than bone tissue

A

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

50
Q

intrinsic cemental fibers

A

produced by cementoblasts, fibers parallel to root

51
Q

extrinsic cemental fibers

A

produced by PDL fibroblasts, sharpeys fibers

52
Q

cementum at coronal/middle portion of root

A

acellular, extrinsic fiber cementum

53
Q

cementum at apical 1/3 of root and furcations

A

cellular, mixed stratified cementum

54
Q

cementum in resorption lacunae

A

cellular, intrinsic cementum

55
Q

cementum thickness in cervical portion of root

A

20 - 50um

56
Q

cementum thickness in apical portion of root

A

150 - 250um

57
Q

dental tissue that most closely resembles bone

A

cementum

58
Q

biological width

A

ct and JE

59
Q

length of biological width

A

2.04mm, round to 3

60
Q

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

A

crown lengthening

61
Q

blood supply to periodontal tissues

A

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

62
Q

which CN branches innervate the periodontium

A

trigeminal

63
Q

what part of embryogenesis precedes the periodontium

A

dental follicle

64
Q

what produces PDL

A

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

DMD6350 - perio (6 decks)

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