Anatomy

Question 1

The masseter muscle arises from the ________ and inserts on the _______ of the mandible

Answer 1

Zygomatic arch
Lateral ramus of the mandible

Question 2

The TMJ is formed by what 2 structures?

Answer 2

1. mandibular articular proces
2. mandibular fossa of the temporal bone

Question 3

What are the 3 alveolar bone layers?

Answer 3

1. Compact bone next to the tooth = cribriform plate and radiographically the lamina dura. This remodels with occlusal stresses
2. Cortical plates covered with periosteum
3. Spongy cancelleous trabecular bone

Question 4

The temporalis muscle is the largest and most powerful muscle of mastication. It occupies the __________ fossa and extends to the _________ of the mandible

Answer 4

Temporal fossa
Coronoid process of the mandible

Question 5

The lateral pterygoid muscle extends from the ______ bone to the _____ of the mandible

Answer 5

sphenoid bone
condyle

Question 6

The medial pterygoid muscle extends from the ______ bone to the ________ of the mandible

Answer 6

sphenoid bone
Articular process

Question 7

The digastricus muscle is responsible for opening the jaw, it arises from the _______ of the occipital bone and inserts on the ________ of the mandible

Answer 7

Jugular process
Ventral border

Question 8

The muscles of mastication are all innervated by the _______ nerve, except the caudal belly of the digastricus muscle which is innervated by the ______ nerve

Answer 8

Trigeminal nerve
Facial

Question 9

Name these clinically important salivary glands

Answer 9

B. Parotid
C. Zygomatic
D. Sublingual
E. Mandibular

Question 10

The base of the frenulum rests in the floor of the mouth. To either side of this base are small elevation sod tissue known as the _____________. These serve as anatomic locations of the duct opening for the ______ and ______ salivary glands.

Answer 10

Sublingual caruncles
Salivary
Mandibular

Question 11

The salivary pH range of dogs and cats is ______

Answer 11

7.2-8.5 - alkaline and facilitates calculus formation

Question 12

The mandibular salivary gland rests between which two vessels in the dog?

Answer 12

linguofacial and maxillary veins

Question 13

Name these clinically important salivary glands

Answer 13

1. Zygomatic
2. Lingual Molar
3. Buccal Molar
4. Sublingual Gland
5. Mandibular Gland
6. Parotid Gland

Question 14

What does this swelling just above the 3rd premolar likely represent in a healthy young dog?

Answer 14

Buccal lymph nodes (present in about 9% of dogs)

Question 15

Where do the zygomatic and Parotid salivary glands empty into the mouth?

Answer 15

Zygomatic: maxillary M1
Parotid: distal root max PM4

Question 16

What are the normal sulcus depths in the dog and cat?

Answer 16

Dog <1-3mm
Cat <0.5mm

Question 17

Kittens should have all deciduous teeth by ____ weeks of age

Answer 17

6 weeks

Question 18

Puppies have all deciduous teeth by ___ weeks of age

Answer 18

10 weeks