Chapter 21

Question 2

The oblique ridge is most likely to be recorded on an intraoral radiograph of the:

Answer 2

D) mandibular posterior region.

Question 3

The incisive foramen is most likely to be recorded on an intraoral radiograph of the:

Answer 3

A) maxillary anterior region.

Question 4

The genial tubercles are most likely to be recorded on an intraoral radiograph of the:

Answer 4

C) mandibular anterior region.

Question 5

The zygomatic process is most likely to be recorded on an intraoral radiograph of the:

Answer 5

B) maxillary posterior region.

Question 6

Bones are solid only on the outside and honeycombed within.

Answer 6

TRUE

Question 7

Small, interconnected trabeculae form a multitude of various-sized compartments that account for the honeycomb appearance of cancellous bone radiographically.

Answer 7

TRUE

Question 8

Cancellous bone appears extremely radiopaque.

Answer 8

FALSE

Question 9

Cortical bone varies in radiopacity according to the size and number of trabeculae.

Answer 9

FALSE

Question 10

The periodontal ligament space appears as a thin radiolucent line between the lamina dura and the root of the tooth.

Answer 10

TRUE

Question 11

Nutrient canals are thin radiolucent lines of uniform width that sometimes exhibit radiopaque borders.

Answer 11

TRUE

Question 12

The lingual foramen is a depression on the labial aspect of the mandibular incisor area, often appearing as a generalized radiolucent area around the incisor apices.

Answer 12

TRUE

Question 13

The nasal septum appears as a radiopaque V-shaped projection from the floor of the nasal fossa in the midline.

Answer 13

FALSE

Question 14

An important radiographic landmark is the inverted Y, which is seen between the right and left nasal fossae.

Answer 14

FALSE

Question 15

A thin radiopaque line delineates the midline of the palate and the junction of the right and left maxilla.

Answer 15

FALSE

Question 16

The lingual foramen is a very small opening located in the center of the genial tubercles on the lingual side of the mandible.

Answer 16

TRUE

Question 17

While the maxillary sinus appears radiolucent on a radiograph, the maxillary sinus walls appear radiopaque.

Answer 17

TRUE

Question 18

A line of union of adjacent cranial or facial bones that appears radiolucent on radiographs is called a ‘suture.’

Answer 18

TRUE

Question 19

The alveolar process is that portion of the maxilla or mandible that surrounds and supports the teeth.

Answer 19

TRUE

Question 20

Structures that are dense and absorb or resist the passage of x-rays will appear dark or black on the radiograph.

Answer 20

FALSE

Question 21

Examples of anatomic landmarks that appear radiolucent include ridges, spines, and tubercles.

Answer 21

FALSE

Question 22

Examples of anatomic landmarks that appear radiopaque include foramina, canals, and sutures.

Answer 22

FALSE

Question 23

Examples of anatomic landmarks that may appear on a maxillary anterior radiograph include the nasal septum, anterior nasal spine, and soft tissue shadow of the nose.

Answer 23

TRUE

Question 24

Examples of anatomic landmarks that may appear on a mandibular anterior radiograph include the genial tubercles, lingual foramen, and mental ridge.

Answer 24

TRUE

Question 25

Examples of anatomic landmarks that may appear on a mandibular posterior radiograph include the oblique ridge, mylohyoid ridge, and mental foramen.

Answer 25

TRUE

Question 26

How does cortical bone appear on a radiograph?

Answer 26

Radiopaque.

Question 27

What are the four small radiopaque bony crests imaged at the midline of the mandible called?

Answer 27

Genial tubercles.

Question 28

What is the very small, circular radiolucency often observed in the middle of the radiopaque genial tubercles called?

Answer 28

Lingual foramen.

Question 29

What is the radiopaque ridge that extends forward and downward on the lateral surface of the mandible called?

Answer 29

Oblique ridge.

Question 30

What is a bony growth extending out from the lingual surface of the mandible called?

Answer 30

Torus mandibularis.

Question 31

What term is applied to a large, irregularly shaped radiolucency below the mylohyoid ridge and roots of the mandibular molars?

Answer 31

Submandibular fossa.

Question 32

What is the round radiolucency often observed near the apices of the mandibular premolars called?

Answer 32

Mental foramen.

Question 33

What is the vertical radiopaque line separating the paired radiolucencies of the nasal cavity called?

Answer 33

Nasal septum.

Question 34

What is the thin radiolucent line that delineates the midline of the palate and the junction of the right and left maxilla called?

Answer 34

Median palatine suture.

Question 35

How does the lateral fossa appear on a dental radiograph?

Answer 35

As a radiolucency between the maxillary lateral incisor and canine teeth.