Ch.103/Ch.104 Temporomandibular Joint Diorders, Craniomaxillofacial Disorders

Question 1

What is unique about the cartilage of the TMJ

Answer 1

Fibrocartilage not hyaline

Question 2

The incongruence between the shape of the mandibular and temporal condyles of the TMJ is mitigated by what

Answer 2

A fibrocartilage disc

Question 3

Components of the TMJ

Answer 3

Fibrocartilaginous disc
Articular tubercle

Dorsally -
1. Mandibular fossa
2. Retro-articular process of the
temporal bone

Ventrally -
1. Condylar process of the mandible

Question 4

How many pouches has the TMJ, which is larger

Answer 4

2
Dorsal - discotemporal 5ml
Ventral - discomandibular 3ml

Question 5

Each compartment of the TMJ has a cranial and a caudal out pouching, which of them is largest

Answer 5

Caudolateral of dorsal compartment accounts for 80% of space of discotemporal

Question 6

Innervation of TMJ

Answer 6

Inntraarticular neuromuscular bundle involving masseteric n (br of mandibular n. - CN V)

Transverse facial branch of auriculotemporal n runs ventral to joint

Auriculopalpebral n (br of facial n) caudal to j covered by parotid

Question 7

Where are the supporting ligs of the joint located

Answer 7

Caudal and lateral

Question 8

Muscles involved in joint movement

Answer 8

Temporal
Pteryoid - lateral and medial
Masseter

Question 9

Blood supply to the TMJ

Answer 9

Transverse facial
Superficial and deep temporal
Tympanic

Question 10

When does the synchondrosis of the mandible ossify

Answer 10

2 years old

Question 11

Cerebral cranium consists of

Answer 11

1. Frontal bone
2. Interparietal
3. Parietal bone
4. Temporal
5. Sphenoid
6. Occipital
7. Ethmoid

Question 12

Visceral cranium consists of

Answer 12

1. Frontal
2. Nasal
3. Lacrimal
4. Zygomatic
5. Paired incisive
6. Premaxilla
7. Vomer
8. Palatal
9. Pterygoid