NBDE ANATOMICAL SCIENCES: Periodontium Flashcards Preview

NBDE PART 1 BIOCHEM/PHYSIOLOGY > NBDE ANATOMICAL SCIENCES: Periodontium > Flashcards

Flashcards in NBDE ANATOMICAL SCIENCES: Periodontium Deck (75):
1

surrounding the gingival portion of the root of each tooth is a specialized epithelium known as the

junctional epithelium

2

the dentogingival epithelium is the junction bw the

tooth surface and the gingival tissues

3

the sulcular epithelium and junctional epithelium form the _ made of ___ epithelia

dentogingival junctional tissues
non-keratinized stratified squamous epithelium

4

___ epithelium aka crevicular epithelium stands away from the tooth, creating a gingival sulcus or space that is filled with gingival fluid

sulcular

5

__ epithelium is a deeper extension of the sulcular epithelium. It begins at the BASE of the sulcus

junctional

6

the junctional epithelium is 15-30 cell layers thick at the _ end and only a few cells thick at the ___

at beginning it is 15-30 cell layers thick
at end only a few cells thick

7

the junctional epithelium consists of 2 layers a _ and _

basal layer and suprabasal layer

8

which layer of the junctional epithelium provides the hemidesmosomes

superficial aka suprabasal epithelial cells

9

the internal basal lamina/outer basal lamina provide the epithelial attachment of the junctional epithelium

internal basal lamina

10

in ideal gingival health, the JE is located entirely in _, above the __ (CEJ/DEJ)

enamel, above the CEJ

11

what is the difference histologically bw the free gingiva and the epithelial attachment (JE)?

the free gingiva contains rete pegs and CT papillae but JE (epithelial attachment) does not

12

__ are epithelial projections that extend into the gingival CT

rete pegs

13

___ are CT progejections that extend into the overlying epithelium

connective tissue papillae

14

which gingival fibers extend bw the cementum and approximating teeth?

transseptal

15

the mucosa on the hard palate is known as

masticatory mucosa

16

oral mucosa is composed of what two layers

stratified squamous epithelium (which can be parakeratinized/non keratinized/orthokeratinized depending on location) and LAMINA PROPIA = CT supporting epithelium. can be attached to periosteum of bone or interposed over the submucosa

17

the submucosa contains the

glnads/bv/nerves

18

the soft palate is _ mucosa

lining mucosa

19

the free, interdental and attached gingiva are _ mucosa

masticatory mucosa

20

the dorsal tongue surface is both _ and __ mucosa

specialized and masticatory

21

the buccal mucosa, labial mucosa, alveolar mucosa, floor of mouth, ventral tongue surface and soft palate are __ mucosa

lining

22

the free gingiva, attached gingiva, interdental gingiva, hard palate, dorsal surface of tongue are _ mucosa

masticatory

23

the lining mucosa are/not keratinized

not! thin lamina propria with few rete pegs

24

the masticatory mucosa are/not keratinized

are! thick lamina propria with many rete pegs

25

the __mucosa of the dorsal tongue is associated with lingual papillae.

specialized

26

Lingual papillae are

the small nipple or hair–like structures on the upper surface of the tongue that give the tongue its characteristic rough texture.

27

There are four types of lingual papillae on the human tongue: circumvallate papillae (vallate papillae), fungiform papillae, filiform papillae and foliate papillae. All except the ___papillae are associated with taste buds

filiform

28

the specialized mucosa is __ keratinized

mostly

29

which lingual papillae are keratinized?

circumvallate and the filiform (to remember, both are the only ones that the 2nd letters are I)

30

which lingual papillae are NOT keratinized?

fungiform and foliate

31

the crevicular (sulcular) epithelium and the gingival COL are __keratinized?

not

32

the gingival _ is the interdental depression in the gingiva bw the buccal and lingual papillae

col

33

the lining of healthy sulcus is composed of __keratinized epithelial tissues with _ rete pegs

nonkeratinized, no rete pegs

34

the presence of rete pegs in the sulcus indicates

inflammation

35

the junction of the lining mucosa and masticatory mucosa Is called the

mucogingival junction

36

the BM is located bw

oral epithelium and CT.

37

the BM is composed of two layers =

basal lamina
reticular lamina

38

scaling and root planning can remove calculus and stimulate the gingiva. usually periodontics waits 4-6wks after procedure to reevaluate therapy. this allows healing of the CT by what cellular component of the gingival CT?
osteoblast/odontoblast/fibroblast/ameloblast

fibroblast = responsible for synthesis and secretion of collagen and proteins. therefore they are responsible for healing of the gingiva following surgery or disease processes

39

the gingival apparatus is the

gingival ligaments and epithelial attachment

40

which is not a derivative of the dental follicle:
pulp/cementum/PDL/alveolar bone

pulp

41

the dental follicle is aka

the dental sac!

42

the dental follicle (Dental sac) is responsible for the development of the

supporting structures of the tooth = including the cementum, PDL and alveolar bone

43

the pulp is a derivation of the

dental papilla (P for pulp)

44

the __ appears as the periodontal space on radiographs (0.2mm width)

PDL = a radiolucent area bw the radiopaque lamina dura of the alveolar bone proper and the radiopaque cementum

45

the PDL is _ CT

fibrous

46

PDL transmits occlusal forces from teeth to bone allowing for a small amount of __ and acting as a shock absorber for the soft tissue around the teeth such as BV and nerves

movement

47

when a tooth loses its function (hypofunction) what happens to the PDL

becomes very thin and loses regular attachment

48

PDL also becomes very thin and loses regular attachment in areas of tension/compression?

tension

49

teeth in hyperfunction have a _ PDL width

increased

50

does the PDL show changes related to aging?

no, unlike other CT tissues of periodontium the PDL does not

51

the PDL can undergo drastic changes as a result of

periodontal disease

52

epithelial rests of Malassez

are remnants of Hertwig's epithelial root sheath found in the PDL of a functional tooth.

53

epithelial rests of Malassez are remnants of Hertwig's epithelial root sheath found in the PDL of a functional tooth that may become mineralized and form __

cementicles

54

Periapical and radicular cysts derive their cyst linings from the

rest of Malassez

55

which periodontal ligament fiber mainly resist movements of a tooth in an occlusal direction

apical group aka periapical = resists extrusive forces that try to pull the tooth out (in an occlusal direction) and rotational forces

56

PDL is made of type _ collagen

type 1 just like dentin

57

the main principal fiber group of the PDL is the

alveolodental ligament (consists of 5 groups)

58

function of this group is to resist tilting forces, which work to force the tip either mesially, distally, lingually or facially

horizontal group (from alveolar bone above crest to cementum horizontally)

59

the function of this group is to resist intrusive forces that try to push tooth inward and also rotational forces

oblique = cover the apical 2/3 of the root from bone to more apically located cementum

60

the function of this group is to work with alveolar crest and apical groups to resist intrusive, extrusive tilting and rotational forces

interradicular group = from cementum into bone in bifurcation of root

61

the _ group function is to resist tilting, intrusive extrusive and rotational forces originates at alveolar crest and fans out to insert into CERVICAL cementum at various angles

alveolar crest group

62

which fibers go from cementum to cementum without attaching to bone

transseptal aka interdental ligaments. = function resist rotational forces and keep teeth in contact

63

note all the PDL fibers resist

rotational forces

64

the ends of the principal fibers which are embedded into the cementum AND alveolar bone are called

Sharpey's fibers

65

what is the most common cell found in the PDL

fibroblasts

66

IN ALL CT THE _ ARE THE MOST COMMON CELL

fibroblasts

67

Contents of PDL

cementoblasts and cementoclasts
osteoblasts and osteoclasts
macrophages mast cells eosinophils
undifferentiated mesenchymal cells
ground substance (proteoglycans, GAGs, glycoproteins and water)

68

functions of PDL

support, formative, nutritive, sensory, remodeling

69

sensory function of PDL?

contains afferent nerves = pain pressure porprioception

70

remodeling function of PDL?

contains cells responsible for remodeling of PDL

71

orthodontic treatment is possible bc the pDL

continuously responds to changes as the result of functional requirements imposed upon the PDL by externally applied forces

72

is the PDL vascular?

yes from maxillary artery

73

the PDL lymphatics drian to the _ lymph nodes except for the mandibular inscisors that drain into the

submandibular
submental lymph nodes

74

what are the two types of nerves found in the PDL

afferent (sensory) = myelinated and transmits sensation.
autonomic sympathetic = regulates the BV's

75

two types of nerve endings in the PDL

FREE nerve endings = convey pain
ENCAPSULATED nerve endings = convey PRESSURE