Normal Anatomy

Question 1

Cortical Bone

Answer 1

[compact] dense outer later of bone, appears radiopaque

Question 2

Cancellous Bone

Answer 2

soft, spongy, between cortical bone. trabeculae (radiopaque) + marrow space (radiolicent)

Question 3

Incisive Foramen

Answer 3

hole in anterior midline of hard palate. *radiolucent, between max central incisors

Question 4

Superior Foramina of the Incisive Canal

Answer 4

two tiny openings at floor of nasal cavity. *radiolucent above apices of max central incisors

Question 5

Median Palatal Suture

Answer 5

joint of palatine processes *radiolucent, thin line between max central incisors

Question 6

Lateral Fossa

Answer 6

[canine fossa] *radiolucent, between max canine/incisors

Question 7

Nasal Cavity

Answer 7

[nasal fossa] large, pear-shaped *radiolucent, above max incisors

Question 8

Nasal Septum

Answer 8

bony partition dividing nasal cavity *radiopaque, superior to apices of max central incisors

Question 9

Floor of Nasal Cavity

Answer 9

bony wall of palatal process and palatine bones *dense radiopaque band of cortical bone above max incisors

Question 10

Anterior Nasal Spine

Answer 10

v-shaped, sharp projection of maxilla located at the floor of nasal cavity and nasal septum *radiopaque

Question 11

Inferior Nasal Conchae

Answer 11

bone extending from lateral walls of nasal cavity *radiopaque, lighter/grayer

Question 12

Border of the Nose

Answer 12

bow-like shape on central incisor PA

Question 13

Border of the Lip

Answer 13

ocasional, projected across crowns of max teeth *may falsely simulate carious lesion

Question 14

Maxillary Sinus

Answer 14

L+R paired cavities above max premolar and molars. *radiolucent
(can contain a septa or radiopaque bony wall)

Question 15

Nutrient Canals

Answer 15

tiny, tubelike passageways in bone containing blood vessels and nerves *radiolucent band with radiopaque borders (cortical bone walls)

Question 16

Inverted Y

Answer 16

intersection of max sinus and nasal cavity, above max canine *radiopaque

Question 17

Nasolabial Fold

Answer 17

soft tissue shadow, associated with buccal fat pad

Question 18

Maxillary Tuberosity

Answer 18

rounded extension posterior/distal to 3rd molar *radiopaque bulge

Question 19

Hamulus

Answer 19

hooklike projection from sphenoid bone *radiopaque

Question 20

Zygomatic Process

Answer 20

A/J/U shaped bony projection of cheekbone above max 1st molar *radiopaque

Question 21

Zygoma

Answer 21

cheekbone *radiopaque

Question 22

The Mandible

Answer 22

largest/strongest bone of face. 3 parts: ramus, body, alveolar process

Question 23

Genial Tubercles

Answer 23

ring shaped bone bumps on lingual mandible below mand incisors *radiopaque

Question 24

Lingual Foramen

Answer 24

surrounded by genial tubercles *radiolucent

Question 25

Mental Ridge

Answer 25

thick linear band extending from mand premolar to incisor region *radiopaque / superimposed

Question 26

Mental Fossa

Answer 26

scooped-out, depressed area above mental ridge *radiolucent

Question 27

Mental Foramen

Answer 27

opening near mand premolars, misdiagnosed as periapical lesion *radiolucent

Question 28

Soft Tissue of Lower Lip

Answer 28

margin visible on anterior mand PA

Question 29

Mandibular Canal

Answer 29

tubelike passageway, houses alveolar nerve, from mandibular to mental foramen *radiolucent band outlined with radiopaque lines of bone/wall

Question 30

Mylohyoid Ridge

Answer 30

[internal oblique ridge] prominence of internal surface of mandible from mand molars downward *radiopaque band

Question 31

External Oblique Ridge

Answer 31

prominense on external surface near mand molars *radiopaque

Question 32

Anterior Border of Ramus

Answer 32

vertical curved border near mand molar *radiopaque

Question 33

Submandibular Fossa

Answer 33

scooped out, depression on internal surface of mandible molar region *radiolucent

Question 34

Coronoid Process

Answer 34

triangular prominence on anterior ramus *radiopaque in max tuberosity area

Question 35

Supporting Tooth Structures

Answer 35

Lamina Dura (radiopaque, surrounds root) Alveolar Crest (radiopaque, between teeth) PDL (radiolucent, between tooth and LD)

Question 36

Alveolar Bone Shape

Answer 36

Anterior = pointed ; Posterior = flat