Mandibular Intraoral anatomy

Question 1

Symphysis

Answer 1

▪In Infants it is a radiolucent line through
the midline of the jaw between the
images of the forming deciduous central
incisors.

Question 2

Genial Tubercles

Answer 2

▪They are bony protuberances
located on the lingual surface of
the mandible slightly above the
inferior border and in the midline.

Question 3

Lingual Foramen

Answer 3

▪Is a foramen on the lingual surface of the
midline of the mandible in the region of the
genial tubercles.
▪There are often two or even more.

Question 4

Mental Ridge

Answer 4

▪On periapical radiographs of the
mandibular central incisors, the mental
ridge may occasionally be seen as two
radiopaque lines sweeping bilaterally
forward and upward toward the
midline.

Question 5

Mental Fossa

Answer 5

▪The mental fossa is a depression
on the labial aspect of the
mandible extending laterally from
the midline and above the mental
ridge.

Question 6

Mental Foramen

Answer 6

▪The mental foramen is
usually the anterior limit of
the inferior dental canal.

Question 7

Mandibular Canal

Answer 7

▪The radiographic image of the
mandibular canal is a dark linear
shadow with thin radiopaque
superior and inferior borders.

Question 8

Nutrient Canals

Answer 8

▪Nutrient canals carry a
neurovascular bundle and appear
as radiolucent lines of fairly
uniform width.

Question 9

Internal Oblique Ridge

Answer 9

▪The mylohyoid ridge is a slightly
irregular crest of bone on the
lingual surface of the mandibular
body.
▪Also called mylohyoid ridge

Question 10

Submandibular
Gland Fossa

Answer 10

▪Is a depression of the bone on
the lingual surface of the
mandibular body, immediately
below the internal oblique ridge in
the molar area.

Question 11

External Oblique
Ridge

Answer 11

▪Is a continuation of the
anterior border of the
mandibular ramus.

Question 12

Inferior Border of
the Mandible

Answer 12

▪Occasionally, the inferior
mandibular border is seen on
periapical projections as a
characteristically dense, broad
radiopaque band of bone.

Question 13

Coronoid Process

Answer 13

▪The image of the coronoid
process is triangular radiopacity,
with its apex directed superiorly
and anteriorly, superimposed on
the region of the third molar.

Question 14

Mandibular tori

Answer 14

▪ Bony outgrowths on the lingual
surface of the mandible
▪Often bilateral and symmetrical