oral radiology

Question 1

traumatic bone cyst

Answer 1

RL, in the body of the mandible, apical to severe teeth, scalloped cortical border around roots
vital teeth, no epithelial lining (dead space)

Question 2

Dentigerous cyst

Answer 2

Associated with an impacted or unerupted tooth
Spans CEJ to CEJ

Question 3

Located in an edentulous space

Answer 3

Residual cyst

Question 4

Central giant cell granuloma

Answer 4

Well-defined, uni or multilocular radiolucency
● Often located in anterior mandible that crosses midline

Question 5

Odontogenic myxoma

Answer 5

● Well-defined, multilocular radiolucency
● Often located in posterior mandible or third molar region ● “Honeycomb” or “tennis racket” appearance
● Whispy trabeculae

Question 6

“Honeycomb” or “tennis racket” appearance

Answer 6

Odontogenic myxoma

Question 7

Well-defined, multilocular radiolucency ● Often located in posterior mandible
● Scalloped borders

Answer 7

Odontogenic keratocyst

Question 8

Ameloblastoma

Answer 8

Well-defined, uni or multilocular radiolucency ● Often located in the posterior mandible
● “Soap bubble” appearance

Question 9

Acute osteomyelitis

Answer 9

Ill-defined, non-corticated radiolucency,history of trauma, surgery or infection

Question 10

● Ill-defined radiolucency
● “Sunburst” appearance
● Potential opacities within the lesion

Answer 10

Osteosarcoma

Question 11

● Mobile teeth
● Telangiectasias
● History of previous cancer or evidence of recurrence
or metastasis
● Ill-defined radiolucency ● Destructive

Answer 11

Metastatic carcinoma

Question 12

Mixed radiolucent-radiopaque ● “Onion peel” appearance

Answer 12

Chronic osteomyelitis

Question 13

Adenomatoid odontogenic tumor

Answer 13

Retained primary tooth
● Unerupted permanent teeth
● Well-corticated, mixed radiolucent-radiopaque

Question 14

● Typically occurs in African American adult females over the age of 30
Mixed radiolucent-radiopaque
● Often located in periapical mandibular incisor region

Answer 14

Periapical cemento-osseous dysplasia

Question 15

hyperparathyroidism

Answer 15

multiple focal lesion
loss of lamina dura
brown tumor

Question 16

cherubism

Answer 16

bilateral symmetrical jaw expansion
soap bubble apperance

Question 17

● Thickening of lamina dura
● “Hair-on-end” striations on a skull in cephalometric
radiograph
Interproximal alveolar bone “step ladder” pattern

Answer 17

Sickle cell disease

Question 18

Multiple “punched out” osteolytic lesions

Answer 18

Multiple myeloma

Question 19

Radiopaque
● Irregular sclerosis adjacent to the apex of a root
● Involved with both vital and non-vital teeth

Answer 19

Condensing osteitis

Question 20

● Radiopaque
● Bulbous, enlarged roots ● Thickened cementum
vital teeth

Answer 20

Hypercementosis

Question 21

● Radiopaque
● Often located in posterior mandible ● Not associated with teeth

Answer 21

Idiopathic osteosclerosis (dense bone island)

Question 22

● Radiopaque mass with thin radiolucent border
● Commonly associated with mandibular first molars ● Attached to root
● Root resorption

Answer 22

Cementoblastoma

Question 23

● History of Gardner syndrome
Radiopaque
● Can have radiolucencies within

Answer 23

Osteoma

Question 24

Mixed radiolucent-radiopaque
● Multiple, small tooth-like structures

Answer 24

Compound odontoma

Question 25

Mixed radiolucent-radiopaque
● Ill-formed mass resembles tooth density
unerupted/ impacted teeth

Answer 25

complex odontoma

Question 26

normal bone is replaced by fibrous bone
● Mixed radiolucent-radiopaque
● Often located in the posterior mandible

Answer 26

Focal cemento-osseous dysplasia

Question 27

Ossifying fibroma

Answer 27

Mixed radiolucent/radiopaque ● Expansile

Question 28

Mixed radiolucent-radiopaque ● Associated with impacted teeth

Answer 28

Calcifying odontogenic cyst