Maxilla, mandible, TMJ

Question 1

identify the numbered structures

Answer 1

1. incissive fossa
2. palatine process of maxilla
3. horizontal plate
4. greater palatine foramina
5. lesser palatine foramina

Question 2

identify the number structures on the mandible

Answer 2

1. coronoid process
2. condylar process
3. ramus
4. angle of the mandible
5. body of the mandible
6. mental tubercle
7. mental protuberance

Question 3

Identify the numbered structures on the posterior view of mandible

Answer 3

1. lingula
2. mandibular foramen
3. mylohyoid groove
4. mylohyoid line
5. submandibular fossa
6. digastric fossa
7. mental spines

Question 4

what group of muscles suspends and stabilizes the larynx

Answer 4

extrinsic laryngeal muscles

• suprahyoid m.m. = suspension
• infrahyoid m.m. = stabilization

Question 5

list the suprahyoid muscles

Answer 5

1. digastric
2. stylohyoid
3. mylohyoid
4. geniohyoid

Question 6

list the infrahyoid muscles

Answer 6

1. sternohyoid
2. sternothyroid
3. thyrohyoid
4. omohyoid

Question 7

what part of the digastric muscle is attached the mandible? To what structure on mandible?

Answer 7

a) anterior belly
b) digastric fossa

Question 8

what structure on the mandible does the geniohyoid muscle attach to?

Answer 8

mental spines

Question 9

Identify the numbered muscles

Answer 9

1. anterior belly of digastric
2. mylohyoid
3. stylohyoid
4. thyrohyoid
5. sternothyroid
6. sternohyoid
7. omohyoid

NOTE: geniohyoid lies superior to the mylohyoid in this view

Question 10

what is the fulcrum point of the larynx?

Answer 10

the hyoid bone

(fulcrum point means an anatomical structure that acts as a hinge or point of support)

Question 11

what are the suspension points of the extrinsic laryngeal muscles?

Answer 11

1. mandible
2. mastoid process
3. styloid process

Question 12

what are the stabilization points of extrinsic laryngeal muscles?

Answer 12

1. sternum
2. scapulae

Question 13

What joins the anterior and posterior bellies of the diagastric muscle?

Answer 13

intermediate tendon

Question 14

when does the stylohyoid muscle split?

Answer 14

prior to insertion on the hyoid bone, (a.k.a the stylohoid sling) it allows the hyoid bone to slide via the intermediate tendon of the digastric muscle

Question 15

how many muscle make up the floor of the mouth?

Answer 15

1. mylohoid muscle
2. digastric muscle
3. stylohyoid muscle

Question 16

what is the largest facial bone?

Answer 16

mandible

Question 17

Larynx suspension diagram

Answer 17

Question 18

the body of the mandible is at what cervical vertebrae level?

Answer 18

C3

Question 19

what part of the mandible would you palpate the facial artery?

Answer 19

body of the mandible

Question 20

true or false. this mandible is not normal

Answer 20

fasle

it is normal

Question 21

Name the mandibular abnormality

Answer 21

macrogenia

Question 22

name the mandibular abnormality

Answer 22

micronathia

Question 23

name the mandibular abnormality

Answer 23

macrognathia

Question 24

Name the mandibular abnormality

Answer 24

mandibular retrognathism

Question 25

Name the mandibular abnormality

Answer 25

mandibular prognathism

Question 26

Dr. Hall refers the Temporomandibular joint (TMJ) as a ________ joint?

Answer 26

true

Question 27

How many compartments does the TMJ have?

Answer 27

1. inferior - allows rotation 2. superior - allows gliding

Question 28

what separates the TMJ compartments and allows for the movement actions

Question 29

Each TMJ compartment accounts for what % of mouth opening

Answer 29

50 % each

Question 30

what type of action allows the jaw to slightly open

Answer 30

hinge action (rotation)

Question 31

what type of action allows the jaw to open widely

Answer 31

combination of hinge and gliding action

Question 32

where is the point of rotation with TMJ

Answer 32

axis of condylar process

Question 33

which part of the TMJ glides

Answer 33

condylar process

Question 34

what is normal distance for mouth opening

Answer 34

4 - 5 cm With full range of motion, the patient should have 4-5 cm between his/her central incisors

Question 35

What technique might be used if you are having trouble scissoring a patient's mouth open after relaxation?

Answer 35

use thumb (at central incisor) & index finger (base of mandible) to pull/glide the mandible forward. then open by rotation (hinge action)

Question 36

What preop evaluation allows us to test the limitation (if any) of the TMJ

Answer 36

1. having the patient open his or her mouth 2. asking the patinet to protrude their jaw

Question 37

what is the term for a large chin

Answer 37

macrogenia

Question 38

what is the term for a small chin

Answer 38

microgenia

Question 39

what is the term for a small mandible (or jaw)

Answer 39

micrognathia

Question 40

what is macrognathia

Answer 40

a large mandible (or jaw)

Question 41

what is the term for a receding jaw

Answer 41

mandibular retronagthism

Question 42

what is the term for a protruding jaw

Answer 42

mandibular prognathism