Radiology Midterm

Question 1

Answer 1

Lamina Dura

A thin, hard layer of commpact alveolar bone that appears as a continuous white line on radiograph: Lines the socket and strongly signifies a vital pulp.

Question 2

Answer 2

PDL space/ Periodontal Ligament Space

Radiolucent line between root and lamina dura

Widening due to:

1) Tooth Mobility
2) Disease

Question 3

Answer 3

Alveolar Bone

Consists of inner and outer cancellous (spongy) bone

Question 4

Answer 4

Alveolar Crest

Thin, White, radiopaque line

Question 5

Answer 5

Incisive Foramen

Oval or round shaped radiolucency that transmits the nasopalatine nerve and vessels

Question 6

Answer 6

Median Maxillary Suture/ Median Palatal Suture

Thin, Radiolucent line

Question 7

Answer 7

Nasal Cavity / Nasal fossa

Radiolucent cavity above central incisors

*Nasal Conchae

Shell shaped bones that appear as diffuse radiopaque masses

Question 8

Answer 8

Nasal Septum

Vertical Bony wall that appears as a radiopaque line that divides the nasal fossa

Question 9

Answer 9

Floor of Nasal Cavity

Radiopaque wall of cortical bone

Question 10

Answer 10

Anterior Nasal Spine

Question 11

Answer 11

Soft Tissue Shadows

Nose (Yellow)

Lip (Green)

Question 12

Answer 12

Maxillary Canine Area/ Y-line of Ennis

Black arrow= lateral wall of nasal fossa

Grey arrow= Maxillary sinus

Question 13

Answer 13

Maxillary Sinus/ Sinus Septa (Septum)

Question 14

Answer 14

Maxillary Tuberosity

Radiopaque bluge distal to the third molar region

Star= pterygoid plates

Question 15

Answer 15

Black Arrows= Genial Tubercles

Bumps of bone appearing as a radiopacity for muscle attachment

Red Arrows= Lingual Foramen

Question 16

Answer 16

Mental Ridges

Question 17

Answer 17

Mental Foramen

An oval/round radiolucency where the inferior alveolar nerve divides into its terminal branches- incisive and mental nerves

Can run close to third molar roots, causing problems upon extraction

Question 18

Answer 18

Mandibular Canal

Contains the inferior alveolar nerve and blood vessels that extend from the mandibular foramen ro the mental foramen

Question 19

Answer 19

Mandibular Canal

Contains the inferior alveolar nerve and blood vessels that extend from the mandibular foramen ro the mental foramen

Can run close to third molar roots, causing problems upon extraction

Question 20

Answer 20

Internal oblique ridge / Mylohyoid ridge

For muscle attachment and appears as a dense radiopaque band underneat the apicies of the molars

Question 21

Answer 21

External Oblique Ridge

A continuation of the anterior border of the ramus appearing as a distinct radiopaque band just underneath crown of the molars

Question 22

Answer 22

Submandibular Gland Fossa

Depression on the lingual side of the mandible below mylohyoid ridge.

Trabecular pattern of bone is sparse and appears as a radiolucency

Differs from pathology in that it occurs bilaterally

Question 23

Answer 23

Coronoid process of the mandible

Question 24

Answer 24

Yellow arrows=Zygomatic Process of Maxilla: “U” shaped radiopacity

Red Arrows= Zygomatic bone

Question 25

Answer 25

External Auditory Meatus Round radiolucent hole in temporal bone

Question 26

Answer 26

Mastoid Air Cells Located just posterior or EAM

Question 27

Answer 27

Base of middle cranial fossa

Question 28

Answer 28

Pterygomaxillary fissure Separates the lateral pterygoid plate fromthe maxilla A radiolucent Inverted tear drop Important for diagnosis of pathology- destroying the border

Question 29

Answer 29

Pink= Orbital rim Yellow= Infraorbital Canal

Question 30

Answer 30

Styloid Process Stylohyoid ligament attaches to this bony fingerlike projection

Question 31

Answer 31

Yellow Arrows= Hyoid Bone Pink circle= Artefact via lead apron

Question 32

Answer 32

Cervical Vertebrae Displayed as a double real image and a superimposed ghost image Having patient stand tall as possible will reduce this ghost image

Question 33

Answer 33

Borders of Maxillary sinus

Question 34

Answer 34

Red= Zygomatic process of the maxilla Green= Temporal bone Black Lines= Zygomatic bone Black Circle= Zygomatico-Temporal suture

Question 35

Answer 35

Yellow= Zygomatic process of the maxilla "J" shaped radiopacity located medial to posterior wall of maxillary sinus (Red arrows)

Question 36

Consisting of 1, 2, and 3

Answer 36

Zygomatic Arch Consists of: 1) Zygomatic process of maxilla 2) Zygomatic Bone 3) Temporal Bone

Question 37

Answer 37

Floor of Nose and Hard Palate

Question 38

Answer 38

Yellow= Nasal Septum Orange= Nasal Fossa

Question 39

Answer 39

Inferior Turbinate bones/Nasal Conchae (T)

Question 40

Answer 40

Yellow= Maxillary Tuberosity Green= Pterygoid plates

Question 41

Answer 41

Red= Condylar head Yellow= Sigmoid notch Green= Coronoid process

Question 42

Answer 42

Red= External Oblique Ridge Yellow= Angle of Mandible Blue= Inferior cortical border

Question 43

Answer 43

Yellow= Madibular Foramen Green= Inferior alveolar nerve canal Pink= Mental foramen Mandibular foramen is not often clearly seen as a radiolucent circle, but can mimic pathology when superimposed over a root apex

Question 44

Answer 44

Mental Fossa Bone here is less dense than protuberance of chin, and is seen as an oval radiolucency

Question 45

Answer 45

Ear

Question 46

Answer 46

Epiglottis

Question 47

Answer 47

Yellow= Soft tissues of the neck Pink= Carotid artery calcifications (abnormal)

Question 48

Soft Tissue

Answer 48

Ala of the nose

Question 49

Answer 49

Soft Palate

Question 50

Answer 50

1) Nasal Cavity 2) Nasopharynx 3) Oropharynx 4) Palatoglossa air space 5) Oral Cavity a) Ala of the nose b) Ear lobe c) Tongue d) Lingual tonsils e) Epiglottis f) Soft Palate

Question 51

Answer 51

Corneal Transplant (Abnormality)

Question 52

Answer 52

Screws and their ghost images (Abnormality)

Question 53

Answer 53

Tongue Piercing

Question 54

Answer 54

Borders of Maxillary sinus

Question 55

Answer 55

Borders of Orbit

Question 56

Answer 56

Zygomatic Process of the Maxilla

Question 57

Answer 57

Pterygomaxillary Fissure

Question 58

Answer 58

White arrows= soft Palate Red arrows= tongue

Question 59

Answer 59