Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AU 15- Periodontology > Junctional Epithelium > Flashcards

Junctional Epithelium Flashcards

1
Q

During tooth eruption, the junctional epithelium is made up of ________ epithelium.

A

Reduced Dental Epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

After tooth eruption, cells of the _______ possess the ability to differentiate into cells of the junctional epithelium.

A

oral epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

At which location is the junctional epithelium widest?

A

in the coronal region (15-20 cell layers thick)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

At which location is the junctional epithelium most narrow?

A

in the CEJ region (3-4 cell layers thick)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

True or False: Junctional Epithelium is continuously renewed.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

True or False: Turnover rate for oral epithelium is faster than junctional epithelium.

A

False: JE is faster

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Compared to oral epithelium, the junctional epithelium has larger ____ and larger ______.

A

cells and intercellular space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The junctional epithelium has fewer _____ than the oral epithelium.

A

desmosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the significance in different numbers of desmosomes between JE and OE?

A

Fewer desmosomes means larger gaps in the JE. Neutrophils must be able to enter/leave through the JE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which type of epithelium has the ability to keratinize, JE or OE?

A

Junctional Epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

True or False: The junctional epithelium is simply in contact with the tooth, not physically attached.

A

False; JE is attached

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why is it important to never probe sulcular pockets in children?

A

the JE sits much higher in children because passive eruption has not occured. The sulcus is much more shallow and sensitive to forced attachment loss.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is “attachment loss?”

A

apical movement of the junctional epithelium down the root surface, away from the CEJ; it is not a physical loss of epithelium but rather a loss of position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

True or False: Viable functional epithelium is necessary for pocket formation.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens in Necrotizing Ulcerative Periodontitis (NUP)?

A

Junctional epithelial cells DIE and bone is exposed; there is NO POCKETING

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Clinical attachment loss is equal to ______ + ________.

A

Pocket depth + gingival recession

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Is gingival recession recorded as a positive or negative number?

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

If a patient has a pocket depth of 10mm, but the bottom of the pocket is only 7mm below the CEJ: how much recession do they have?

A

+3mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

If a patient has a pocket depth of 6mm, but the free gingival margin is 3mm coronal to the CEJ: how much attachment loss do they have? Is this normal/what is happening?

A

Clinical Attachment Loss (CAL) = recession +pocket depth
-3mm + 6mm = 3 mm AL
This is pseudopocketing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

If a patient has 3mm of recession and a 6mm pocket depth, what is their CAL?

A

9mm (pocket depth + recession)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Gingival Connective Tissue (lamina propria) matrix and fibers are synthesized by _______.

A

Fibroblasts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which cells of the lamina propria are vasoactive?

A

Mast Cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which cells of the lamina propria are synthesizing and phagocytic?

A

Macrophages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

In addition to fibroblasts, mast cells, and macrophages; which cells types are present in the lamina propria (gingival connective tissue)?

A

Neutrophilic Granulocytes
Lymphocytes
Plasma Cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Which four fiber types are prevalent in the lamina propria (gingival CT)?

A
  1. collagen
  2. reticulin
  3. ocytalan
  4. elastic
    * C.O.R.E of the gingiva*
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Which fiber type is most abundant in the gingival connective tissue (lamina propria)?

A

Collagen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is characteristic of collagen in the lamina propria?

A

Cross-banding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Collagen is produced by _______, ________, and ______.

A

Fibroblasts
Osteoblasts
Cementoblasts

29
Q

Which two fiber types of the lamina propria are found around blood vessels?

A

Reticulin and elastic fibers

30
Q

Which fiber type of the lamina propria is found mostly in the PDL?

A

Oxytalan

31
Q

What three critical roles do gingival fibers play in the periodontium?

A
  1. reinforce the gingiva
  2. provide resilience and tone
  3. maintain architectural form and integrity
32
Q

Name four important gingival fiber types.

A
  1. Circular
  2. Dentogingival
  3. Dentoperiosteal
  4. Transseptal
33
Q

Which gingival fiber type encircles the tooth like a cuff?

A

Circular

34
Q

Which gingival fiber type fans out from supracrestal cementum into free gingiva?

A

Dentogingival

35
Q

Which gingival fiber type runs from supracrestal cementum into attached gingiva?

A

Dentoperiosteal

36
Q

Which gingival fiber type runs from tooth to tooth (embedded in cementum)?

A

Transseptal

37
Q

What is the difference between dentoperiosteal and dentogingival?

A

both run from supracrestal cementum:
gingival–>free gingiva (more coronally fanned out)
periosteal–>attached gingiva (more apical)

38
Q

Definition: Richly vascular and cellular connective tissue surrounding the roots and joining cementum and alveolar bone.

A

Periodontal Ligament (PDL)

39
Q

Radiographically, the PDL is the space between the ________ (alveolar bone proper) and the root surface.

A

lamina dura

40
Q

How wide is the PDL?

A

~0.25mm

41
Q

What is the functional importance of the periodontal ligament?

A

permits forces to be distributed and is essential for tooth mobility

42
Q

Name the four fibers of the PDL.

A
  1. Alveolar Crest Fibers (ACF)
  2. Horizontal Fibers (HF)
  3. Oblique Fibers (OF)
  4. Apical Fibers (APF)

think “aLoha” (L for ligament)

43
Q

True or False: There is no structural or compositional difference between differently named fibers of the PDL.

A

True

44
Q

Cells of the PDL include _________, osteoblasts, osteoclasts, cementoblasts, epithelial cells, nerve fibers, and ________.

A

Fibroblasts

Epithelial Rest Cells of Mallassez

45
Q

What are Epithelial Rest Cells of Mallassez?

A

Remnants of Hertwig’s epithelial root sheath

46
Q

What is the mineralized tissue that covers the root surface and portions of the tooth crown?

A

Cementum

47
Q

Cementum is similar to bone but differs in which four critical ways?

A
  1. No blood vessels
  2. No lymph vessels
  3. No innervation
  4. No physiologic resorption/remodeling
48
Q

What is the mineral content of cementum?

A

65%

49
Q

True or False: Cementum is continually deposited throughout life.

A

True

50
Q

Cementum ______ fibers are embedded in ______ matrix.

A

Collagen

Organic

51
Q

INTRINSIC cemental fibers are produced by _______ and are oriented _______ to the root.

A

Cementoblasts
Parallel
IntrInsIc….the “I”s are all parallel

52
Q

EXTRINSIC cemental fibers are called ________ and are produced by _________.

A

Sharpey’s Fibers

PDL fibroblasts

53
Q

What are the three forms of Cemental fibers?

A

Acellular, extrinsic
Cellular, mixed stratified
Cellular, intrinsic

54
Q

Which cemental fiber type is found in the coronal or middle portion of the root?

A

Acellular, extrinsic fibers

55
Q

Which cemental fiber type is found in the apical third of the root and in furcations?

A

Cellular, mixed stratified

56
Q

Which cemental fiber type is found in resorption lacunae?

A

Cellular, intrinsic

57
Q

Is cementum thickness greater in the cervical or apical portion of the root?

A

Apical (150-250 micrometers)
Cervical (20-50 micrometers)

Think about it: what is internal to the cementum? PULP, which takes up less of the thickness as it moves apically

58
Q

Alveolar bone consists of bone that is formed by cell from which two locations?

A

cells from the dental follicle

cells independent of tooth development

59
Q

Alveolar bone is made up of ______ bone and ______ bone.

A

Cancellous

Cortical

60
Q

Bone marrow is made up of adipocytes, vascular structures, and undifferentiatied _______ cells.

A

mesenchymal

61
Q

True or False: Osteoid (alveolar bone matrix) undergoes mineralization by the deposition of calcium and potassium.

A

False: calcium and PHOSPHATE

62
Q

Alveolar bone matrix is produced by _____ .

A

Osteoblasts

63
Q

Bone matrix (osteoid) consists of _______fibers, proteoglycans, and _________.

A

Collagen fibers

glycoproteins

64
Q

Which dental tissue most closely resembles bone?

A

cementum

65
Q

Blood supply to the gingiva is provided by ________ vessels.

A

Supraperiosteal (terminal branches of multiple vessels of the face)

66
Q

Blood supply to the periodontal tissues is provided by the dental artery, __________, ________, intra-septal artery, and rami perforantes.

A

Superior Alveolar a.

Inferior Alveolar a.

67
Q

Lymphatic drainage of the periodontium is through the _____, deep cervical, _______, and jugulodigastric lymph nodes.

A

Submental

Submandibular

68
Q

The periodontium is innervated by end branches of the _____ nerve.

A

Trigeminal

AU 15- Periodontology (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions