L76: H&N 2

Question 1

Name the bones of the temporomandibular joint (TMJ):

Answer 1

• Head of mandible;
• Articular tubercle;
• Mandibular fossa.

(HAM)

Question 2

Name the ligaments of the TMJ:

Answer 2

• Sphenomandibular ligament;

- Lateral ligament.

Question 3

What are the other main components of the TMJ?

Answer 3

• Capsule;
• Muscles;
• Synovial joint/ fibrocartilaginous disc.

(CMS)

Question 4

The movement at the upper joint…

Answer 4

is gliding forward (protrusion)

Question 5

The movement at the lower joint is…

Answer 5

a hinge movement (depression)

Question 6

The anterior of the TMJ attaches to…

Answer 6

the lateral pterygoid muscle

Question 7

What are the names of the two processes of the ramus?

Answer 7

• Coronoid process AND

- Condylar process.

Question 8

Which nerve supplies the mandible?

Answer 8

The inferior alveolar nerve (the mandibular division of the trigeminal nerve - CNV).

Question 9

What is the mental foramen?

Answer 9

One of two openings located on the anterior surface of the mandible. It transmits the terminal branches of the inferior alveolar nerve.

Question 10

What type of joint is the TMJ?

Answer 10

A synovial joint

Question 11

What is a synovial joint?

Answer 11

A area that joins bones with a fibrous joint capsule (the articular surface)

Question 12

What is a synovial joint?

Answer 12

An joint that joins bones with a fibrous joint capsule (the articular surface)

Question 13

Name the two accessory ligaments of the TMJ:

Answer 13

The sphenomandibular and stylomandibular ligaments.

Question 14

What is the main function of the sphenomandibular ligament?

Answer 14

To limit distension of the mandible in an inferior direction

Question 15

What is the main function of the stylomandibular ligament?

Answer 15

To limit anterior movement of the mandible

Question 16

What is the styloid process?

Answer 16

A thin piece of bone which extends downwards and forwards from the temporal bone. It serves as an anchor point for many muscles.

Question 17

At what position is the TMJ most stable?

Answer 17

When the mandible is elevated and teeth are occluded. i.e. when the condyle is secure in the mandibular fossa.

Question 18

What is the blood supply to the TMJ?

Answer 18

External carotid artery (superficial temporal and maxillary branches)

Question 19

What is the nerve supply to the TMJ?

Answer 19

CNVc: The mandibular branch of the trigeminal nerve

Question 20

What are the 4 muscles of mastication?

Answer 20

• Masseter;
• Temporalis;
• Medial Pterygoid;
• Lateral Pterygoid.