Mandible

Question 1

What is the mandible

Answer 1

This is the lower jaw, it articulates through it’s condyles with the temporal

Question 2

Where is the mandible body or corpus

Answer 2

This is the thick bony part of the mandible which anchors the teeth - Can be used for sexing

Question 3

Where is the mental foramen

Answer 3

This is located on the lateral surface of the body

Question 4

Where is the external oblique line

Answer 4

This is a weak eminence that passes from the root of the ramus to the rear of the mental foramen

Question 5

Where is the retro molar or extramolar sulcus

Answer 5

This is the gap seen between the root of the ramus and the third molar

Question 6

Where is the mylohyoid line

Answer 6

This crosses the medial surface of the corpus, beginning near the alveolar margin running anteroinferiorly

Question 7

Where is the submandibular fossa

Answer 7

This is the hollow beneath the mylohyoid line

Question 8

Where is the sublingual fossa

Answer 8

This is above the mylohyoid line

Question 9

Where is the mandibular torus

Answer 9

This is the thickening of the alveolar margin

Question 10

Where is the mandibular symphysis

Answer 10

This refers to the midline surfaces of the unfused right and left mandibular halves

Question 11

Where is the mental spine or genial tubercles

Answer 11

These are the inferior margin on the posterior surface of the corpus in the midline

Question 12

Where is the digastric fossae

Answer 12

These are the pair of roughened depressions on the inferior surface of the corpus at the midline

Question 13

Where is the mental protuberance or mental eminence

Answer 13

This is the triangular eminence making up the chin (Can be used for sexing)

Question 14

Where is the ramus

Answer 14

This is the vertical part of the mandible (Can be used for sexing)

Question 15

Where is the mandibular condyle

Answer 15

This is the large rounded articular prominence on the top corner of the ramus

Question 16

Where is the condylar neck

Answer 16

This is just under the condyle

Question 17

Where is the coronoid process

Answer 17

This is the thin triangular protuberance at the top of the ramus, anterior to the condyle - can be used for sexing

Question 18

Where is the mandibular notch

Answer 18

This is the notch between the condyle and the coronoid process

Question 19

Where is the gonial angle

Answer 19

This is the rounded posterior angle of the mandible - The flaring can be used for sexing

Question 20

Where is the masseteric tuberosity

Answer 20

This is above the gonial angle - on the ramus

Question 21

Where is the masseteric fossa

Answer 21

This is the hollowing on the lateral surface of the gonial angle

Question 22

Where is the endocoronoid ridge

Answer 22

This is the vertical ridge extending inferiorly from the coronoid tip of the inner aspect of the ramus

Question 23

Where is the mandibular foramen

Answer 23

This is on the medial surface of the ramus this becomes the mandibular canal

Question 24

Where is the lingula

Answer 24

This is the sharp projection at the edge of the mandibular foramen - tongue

Question 25

Where is the mylohyoid groove

Answer 25

This runs down from mandibular foramen on the medial surface of the ramus

Question 26

Where are the pterygoid tuberosities

Answer 26

These are on the medial surface of the gonial angle

Question 26

What can cause sexing the mandible hard

Answer 26

Tooth loss - causes body height loss, ramus tilts and becomes narrow

Question 26

How would you side a mandible

Answer 26

The incisors are anterior and nearer to the midline than the molars, the ramus is posterior.
For isolated condyles the the border of the mandibular notch is lateral
For isolated coronoids the notch is posterior, the tip superior and the endocoronoid ridge is medial
For isolated gonial angles the tuberosities are medial