Deck 22: Recognizing Normal Radiographic Anatomy Panoramic Radiographs

Question 1

Which of the following provides the best organizational framework of steps to aid in learning how to interpret normal radiographic anatomy?

A) First, determine if the structure in question is anterior or posterior; second, determine if radiopaque or radiolucent; third determine if maxilla or mandible.
B) First, determine if the structure in question is maxilla or mandible; second, determine if anterior or posterior; third, determine if radiopaque or radiolucent.
C) First, determine if the structure in question is radiopaque or radiolucent; second, determine if maxilla or mandible; third determine if anterior or posterior.
D) First, determine if the structure in question is anterior or posterior; second, determine if maxilla or mandible; third determine if radiopaque or radiolucent.

Answer 1

First, determine if the structure in question is maxilla or mandible; second, determine if anterior or posterior; third, determine if radiopaque or radiolucent.

Question 2

Which of these is NOT a normal radiographic landmark often imaged on intraoral radiographs?

A) The maxillary sinus
B) The mandibular canal
C) The nasal septum
D) The occipital bone

Answer 2

The occipital bone

Question 3

Which of the following describes the radiographic appearance of the lamina dura?

A) A thin radiolucent border that outlines the root of the tooth
B) A thin radiopaque border that outlines the root of the tooth
C) A radiolucent honeycomb layer adjacent to the root of the tooth
D) A radiopaque honeycomb layer adjacent to the root of the tooth

Answer 3

A thin radiopaque border that outlines the root of the tooth

Question 4

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

A) maxillary anterior region.
B) maxillary posterior region.
C) mandibular anterior region.
D) mandibular posterior region.

Question 5

What is the thin radiopaque border that outlines the root of the tooth called?

A) The trabeculae
B) The periodontal ligament space
C) The alveolar process
D) The lamina dura

Question 6

Which of the following structures of the tooth appears the most radiopaque?

A) Cementum
B) Enamel
C) Dentin
D) Pulp

Question 7

Each of the following appear radiopaque EXCEPT one. Which one is the EXCEPTION?

A) Foramen
B) Process
C) Ridge
D) Spine

Question 8

Which of these statements is FALSE?

A) The incisive foramen appears as a round or pear-shaped radiolucency between the apices of the maxillary central incisors.
B) The nasal fossa appears as two paired radiolucencies separated by the radiopaque nasal septum.
C) The lateral fossa appears as a radiolucency between the maxillary canine and first premolar.
D) The median palatine suture appears as a thin radiolucent line between the maxillary central incisors.

Question 9

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

A) maxillary anterior region.
B) maxillary posterior region.
C) mandibular anterior region.
D) mandibular posterior region.

Question 10

Which of the following is the correct term for a tooth that fails to erupt?

A) Supernumerary tooth
B) Impacted tooth
C) Primary tooth
D) Permanent tooth

Question 11

Each of the following is a structure of the mandible EXCEPT one. Which one is the EXCEPTION?

A) The ramus
B) The condyle
C) The coronoid process
D) The hamulus

Question 12

Which of the following statements regarding normal anatomic landmarks is correct?

A) The maxillae are two bones, a left maxilla and a right maxilla.
B) There are right and left mandibular bones.
C) There are two frontal bones, a right and a left.
D) The sphenoid bone is also called the "malar bone" or "cheekbone."

Question 13

Which of the following bone types will appear the most radiopaque?

A) Cancellous
B) Spongy
C) Cortical
D) Trabecular

Question 14

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

A) maxillary anterior region.
B) maxillary posterior region.
C) mandibular anterior region.
D) mandibular posterior region.

Question 15

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

A) maxillary anterior region.
B) maxillary posterior region.
C) mandibular anterior region.
D) mandibular posterior region.

Question 16

What is the compact or dense bone observed on dental radiographs called?

A) Cortical
B) Cancellous
C) Trabecular
D) Honeycomb

Question 17

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

A) maxillary anterior region.
B) maxillary posterior region.
C) mandibular anterior region.
D) mandibular posterior region.

Question 18

Certain anatomical landmarks may or may not be imaged on dental radiographs depending on:

A) placement of the image receptor.
B) patient positioning.
C) the angle of the x-ray beam.
D) All of the above.

Question 19

Which of the following lists the structures in order of decreasing radiopacity?

A) Pulp, dentin, cementum, enamel
B) Enamel, dentin, cementum, pulp
C) Pulp, cementum, dentin, enamel
D) Enamel, cementum, dentin, pulp

Question 20

Which of the following soft tissues may be imaged on an intraoral dental radiograph?

A) Eyelid
B) Ear lobe
C) Tip of the nose
D) Cheek

Question 21

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

Question 22

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

Question 23

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

Question 24

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

Question 25

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

Question 26

Cancellous bone appears extremely radiopaque.

Question 27

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.

Question 28

Bones are solid only on the outside and honeycombed within.

Question 29

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

Question 30

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

Question 31

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

Question 32

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

Question 33

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

Question 34

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

Question 35

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

Question 36

Radiographs taken on a 5-year-old child will most likely image 20 primary teeth.

Question 37

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

Question 38

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

Question 39

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

Question 40

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

Question 41

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

Question 42

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

Question 43

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

Question 44

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

Question 45

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

Question 46

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

Question 47

How does the lateral fossa appear on a dental radiograph?

Question 48

How does cortical bone appear on a radiograph?

Question 49

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

Question 50

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