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Anatomy - Head and Neck > Week 2: Station 1 - The Mandible, Teeth and TMJ > Flashcards

Week 2: Station 1 - The Mandible, Teeth and TMJ Flashcards

1
Q
A
  1. Coronoid process
  2. Alveolar process
  3. Mental protuberance
  4. Mental foramen (inf. alveolar nerve)
  5. Angle
  6. Body
  7. Ramus
  8. Mandibular notch
  9. Head (condyle)
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2
Q

What are the anatomical changes of the edentulous mandible??

A
  • Lack of mandibular height
  • No teeth
  • Posterior mandible wider
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3
Q

What are the names of adult and baby teeth?

A

Baby teeth = deciduous

Adult teeth = permanent

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4
Q

How many baby teeth do we have?

A

Incisors = 8

Canines = 4

Molars = 8

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5
Q

How many permanent teeth do we have?

A

Incisor = 8

Canines = 4

Premolars = 8

Molars = 12

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6
Q

What type of joint is the temperomandibular joint (TMJ)?

A

Synovial hinge

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7
Q

What are the 2 articular processes of the TMJ?

A

Condyle of mandible

Mandibular fossa of temporal bone

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8
Q

What are the 5 movements that occur at the TMJ?

A

Elevation

Depression

Protrusion

Retraction

Side to side movements

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9
Q

What nerve innervates the sensation of the TMJ?

A

V3

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10
Q

What is the definition of “muscles of mastication”?

A

Muscles that act on the TMJ during chewing

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11
Q

What are the 4 muscles of mastication?

A
  1. Temporalis
  2. Masseter
  3. Lateral pterygoid
  4. Medial pterygoid
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12
Q

What are the bony attachements of the temporalis?

A

Origin = fossa termporalis

Insertion = coronoid process

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13
Q

Note: the posterior fibres of the temporalis are almost horizontal and the anterior ones are almost vertical i.e. this allows a wide range of movement

A
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14
Q

What action do the anterior fibres of the temporalis have on the mandible?

A

Elevation

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15
Q

What are the bony attachments of the masseter? And it’s actions?

A

Origin = zygomatic bone + arch

Insertion = outer surface of the ramus and the angle

Actions = elevation and protrusion

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16
Q

What bone in the skull floor do the pterygoid muscles attach?

A

Sphenoid bone

17
Q

What part of the sphenoid bone do the pterygoid muscles attach?

A

Lateral pterygoid plate

18
Q

Identify the lateral pterygoid plate

A

12

19
Q

What part of the pterygoid plate does the lateral pterygoid attach to?

A

Lateral part

20
Q

What part of the pterygoid plate does the medial pterygoid attach to?

A

Medial part

21
Q

Identify 1, 2 and 3

A
  1. Lateral pterygoid
  2. Masseter
  3. Medial pterygoid
22
Q

Where does the lateral pterygoid attach to on the mandible?

A
  • Enters the TMJ joint capsule
  • Attaches to the neck of the mandible
23
Q

What part of the mandible does the medial pterygoid attach to?

A

Medial surface of angle and ramus

24
Q

How does the mandible move when both lateral pterygoids contract?

A

Protraction

25
Q

How does the mandible move when the medial and lateral pterygoid on one side contract?

A

Side to side movements

26
Q

How does the mandible move when both medial pterygoid muscles contract?

A

Elevation

27
Q

Which of the suprahyoid muscles depress the mandible?

A
  • Mylohyoid
  • Anterior digastric
  • Geniohyoid
28
Q

What muscles elevate the mandible?

A
  • Masseter
  • Temporalis
  • Medial pterygoid
29
Q

What muscles cause protrusion of the mandible?

A

Masseter

30
Q

What muscles cause retraction of the mandible?

A

Lateral pterygoid

31
Q

What muscles cause side to side movement of the mandible?

A

Both pterygoids contracting at once

32
Q

What structure do the motor fibres of the mandibular division of the trigeminal nerve enter to supply the muscles of mastication?

A

Infratemporal fossa

33
Q
A
34
Q

What division of V3 provides sensory innervation to the mandible?

A

Inferior alveolar nerve

35
Q

What is the path of the inferior alveolar nerve?

A
  • Into the mandibular foramen

Anatomy - Head and Neck (19 decks)

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