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Oral Biology 2020 > 4/13/17 TMJ TEST #4 > Flashcards

4/13/17 TMJ TEST #4 Flashcards

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1
Q

What type of joints permit very little movement?

A

-Fibrous joints

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2
Q

What are three examples of fibrous joints?

A
  • Sutures
  • Gomphosis
  • Syndesmosis
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3
Q

What type of joints also permit very little movement?

A

-Cartilaginous joints

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4
Q

What are the two examples of cartilaginous joints?

A
  • Primary

- Secondary

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5
Q

Which example of cartilaginous joints are bone and cartilage in direct apposition?

A

-Primary

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6
Q

Which example of cartilaginous joints are fibrous tissues internally in the joint?

A

-Secondary

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7
Q

What type of joints are typically the moving part joints?

A

-Synovial

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8
Q

What does the capsule of a synovial joint consist of?

A

-Capsule filled with synovial fluid contained in a synovial membrane

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9
Q

The TMJ is called what type of joint?

A

-Synovial sliding-ginglymoid joint

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10
Q

What is the TMJ articulation composed of?

A
  • Condyle of the mandible

- Glenoid fossa

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11
Q

What is anterior to the condyle on which it slides and moves in front of when the jaw open?

A

–Articular eminence

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12
Q

T/F The condyle can rotate and translate in various ways

A

True

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13
Q

The TMJ is divided into two compartments by what?

A

-Articular disc

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14
Q

T/F The disk is effectively an extension of the synovial capsule, not a distinct structure

A

True

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15
Q

What is found between the glenoid fossa and the condyle?

A

-Articular disc

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16
Q

What ear bone does Meckel’s cartilage form?

A

-Malleus

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17
Q

The malleus articulates with the incus forming what type of joint?

A

-Primary joint

18
Q

The articulation between the temporal bone and the TMJ forms what type of joint?

A

-Secondary joint

19
Q

The articular surfaces of the TMJ are covered with what?

A

-Fibrous connective tissue

20
Q

What is the fibrous covering of the condyle known as?

A

-Lamina splendens

21
Q

What is the lamina splendens composed of?

A

-Type I collagen

22
Q

The glenoid fossa is covered by a thin or thick fibrous layer?

A

-Thin

23
Q

The articular eminence is covered by a thin or thick fibrous layer?

A

-Thicker

24
Q

Where do you find a cartilage layer in the TMJ?

A

-Condyle and the Articular eminence

25
Q

What type of collagen do chondrocytes make?

A

-Type II

26
Q

What process forms the bone on the tip of the condyle?

A

-Endochondral

27
Q

T/F There is remodeling that can occur in the TMJ because of the chondroblasts/cartilage found in the condyle and articular eminence

A

True

28
Q

What type of sac is the joint capsule of the TMJ?

A

-Dense collagenous sac

29
Q

The capsule has thickened regions that branch out to form what?

A

-Temperomandibular ligament

30
Q

What does the temporomandibular ligament do?

A

-Restricts lateral and medial movement when the joint articulates

31
Q

What are the three movements that the temporomandibular ligament restricts?

A
  • Medial-lateral
  • Superior-inferior
  • Posteriorly
32
Q

What are two other ligaments that limit the inferior movement of the joint when the jaw is open?

A
  • Sphenomandibular ligament

- Stylomandibular ligament

33
Q

T/F The articular disk is a dense fibrous structure

A

True

34
Q

T/F Posteriorly and anteriorly the articular disk in thinner

A

False

-Thicker

35
Q

What are the two layer of the synovial membrane?

A
  • Subintima

- Intima

36
Q

Which layer of the synovial membrane is a layer of loose connective tissue that contains elastin fibers and supporting vasculature?

A

-Subintima

37
Q

What layer of the synovial membrane contains macrophages, adipocytes, fibroblasts, mast cells and is continuous with the fibrous tissue of the capsule?

A

-Subintima

38
Q

What layer of the synovial membrane is the innermost layer?

A

-Intima

39
Q

What layer of the synovial membrane contains several layers of synovial cells that are either A cells (resemble macrophages) or B cells (resemble fibroblasts)?

A

-Intima

40
Q

What is the difference between synovial fluid and blood plasma?

A

-Synovial fluid contains extra proteins and proteoglycans

Oral Biology 2020 (21 decks)

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