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Oral Bio 2 > Quiz 4 > Flashcards

Quiz 4 Flashcards

1
Q

What’s unique about the cartilage on the TMJ?

A

it’s fibrocartilage

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2
Q

What is hiltons law?

A

muscles acting on a joint have the same nerve supply as the joint.

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3
Q

What four muscles receive motor innervation by “mandibular nerve”?

A

temporalis
masseter
medial pterygoid
lateral pterygoid

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4
Q

What three arteries supply the TMJ and muscles of mastication?

A

Maxillary
Facial
External carotid

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5
Q

What’s the hole the tmj sits in?

A

Glenoid fossa

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6
Q

what does the fibrous articular zone cover?

A

all the bony surfaces internal to the joint capsule

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7
Q

Can the fibrous connective tissue proliferate?

A

Yes

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8
Q

Where does translation occur?

A

The upper maxillary

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9
Q

Where does rotation occur?

A

mandibularly

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10
Q

What is in between the sheets of tmj disk?

A

A space filled with loose, vascular connective tissue

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11
Q

Is the TMJ cavity filled with epithelium?

A

No

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12
Q

What do Type A cells do in the TMJ?

A

phagocytosis

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13
Q

What do Type B cells synthesize in the TMJ?

A

hyaluronate

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14
Q

What’s the function of the synovial fluid?

A

provide liquid environment for the joint surfaces and lubrication
provides nutrients for the avascular tissue

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15
Q

What is the purpose of the TMJ ligament?

A

restrict movement of the condyle posteriorly
prevent Lateral displace (one side) Medial displacement (other side)
prevent Inferior displacement

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16
Q

What is adhesion (in the TMJ)?

A

Scar tissue in the joint that inhibits it from moving as designed

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17
Q

What are the 4 phases of tissue repair?

A
  1. hemostasis: clot
  2. inflammatory: immune cells, initiation
  3. Reparative: proliferate, migration of cells, granulation tissue
  4. Wound contraction: scarring
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18
Q

What leads to the coagulation cascade?

A

Disruption of platelets

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19
Q

What’s different about oral cavity blood clots?

A

Softer and easier to detach

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20
Q

What’s the primary hemostasis platelet plug process?

A

> Vascular spasm (constriction) with platelet plug
Exposed collagen in subendothelium allows platelet plug (bc of von willebrand)
platelets activate and dump out fibrinogen glue

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21
Q

What’s the secondary hemostasis process?

A

> Extrinsic vs Intrinsic pathways
Extrinsic: requires tissue factor not normally found in blood
Intrinsic: uses factors found in the blood
Prothrombin turns in thrombin…which converts soluble fibrinogen to fibrin (insoluble) (a net for clot)
Requires calcium

22
Q

What creates the “granulation tissue”?

A

Cells migrating under the fibrin clot

23
Q

What cytokines help with angiogenesis (blood vessels forming)??

A

TGF-B
VEGF
FGF-2

24
Q

What is primary intention vs secondary intention?

A

Primary: when you stitch the wound
Secondary: when the wound heals on its own.

25
Q

What helps with initial wound contraction?

A

Fibroblasts (myofibroblasts with actin/myosin) draw the edges together

26
Q

Why don’t perio ligaments have a scar with healing?

A

There is immediate remodeling by ligament fibroblasts

27
Q

What prevents epithelial invasion in the perio tissues during root planing?

A

a fake membrane implanted that encourages connective tissue proliferation at the apex and inhibits apical migration of the epithelium

28
Q

What forms a perio pocket?

A

apical migration of junctional epithelium

29
Q

What are the 3 zones of caries?

A
  1. surface and body (body is main zone of demineralization)
  2. Dark zone (increasing demineralized tissue)
  3. Translucent zone: leading edge of micro pores (inner most)
30
Q

Where do secondary odontoblasts come from?

A

mesenchymal progenitor cells in pulp

31
Q

What’s the dentin bridge?

A

dentin formed between surviving dentin and restorative material

32
Q

Could biomaterials (ground up dentin) induce odontoblast differentiation and dentin production?

A

Yes (more rapid dentin bridge)

33
Q

What is tertiary (sclerotic) dentin?

A

the reparative dentin

34
Q

What are the 3 key parts in tissue engineering?

A
  1. Cell source (the right cells to put in)
  2. material (a good scaffold)
  3. Bio-active component (growth factors)
35
Q

What cells do osteoblasts come from?

A

Mesenchymal

36
Q

What does Stro-1 show?

A

That is has a mesenchymal origin

37
Q

What does F4/80 show?

A

macrophages

38
Q

What does TGFB-1 show?

A

growth factor

39
Q

What does Osteopontin show?

A

Non-collagenous protein found in bone healing GT

40
Q

What are three things Actinomyces israelli can cause?

A

Tonsillar crypts
Plaque
Carious dentin

41
Q

What type of granules are in the yellow discharge of Actinomyces?

A

Sulfur

42
Q

What’s the name of the “cat scratch disease”?

A

Baronella henselae

43
Q

Where does “baronella henselae” (cat scratch) spread?

A

Skin to lymph nodes

44
Q

What are the two Candida dimorphic forms?

A

Yeast (innocuous)

Hyphal (invasion of tissues)

45
Q

What are the two common species of Aspergillosus?

A

Fumigatus 90%

Flavus

46
Q

What are the two common species of Aspergillosus?

A

Fumigatus 90%

Flavus

47
Q

What are the two types of Herpes Type 1 for under 18 and over 18?

A
  1. gingivostomatitis

2. Pharyngotonsillitis

48
Q

What are the 3 “less common’’ herpes?

A

Whitlow (fingers and thumb)
Gladiator or Scrumpox (wrestlers)
Barbae (facial shaving)

49
Q

What cells do HIV/AIDs target?

A

CD4/Helper T

50
Q

What are the oral manifestations of HIV/AIDS?

A 
Candidiasis
Hairy Leukoplakia
Kaposis Sarcoma
Non-hodgkins lymphoma
Perio disease

Oral Bio 2 (4 decks)

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