Deck 27: Normal Anatomy: Intraoral Images

Question 1

The superior foramina of the incisive canal are located on the ____ of the nasal cavity.

A) Lateral wall
B) Medial wall
C) Floor
D) Roof

Answer 1

Floor

Question 2

On a periapical radiograph, the superior foramina appear as radiolucencies located superior to apices of the:

A) Maxillary canines.
B) Maxillary central incisors.
C) Mandibular canines.
D) Mandibular central incisors.

Answer 2

Maxillary central incisors.

Question 3

The ____ nerve exits the maxilla through the incisive foramen.

A) Anterior superior alveolar
B) Middle superior alveolar
C) Posterior superior alveolar
D) Nasopalatine

Answer 3

Nasopalatine

Question 4

The superior foramina of the incisive canal are ____ tiny openings or holes in bone.

A) Two
B) Four
C) Six
D) Eight

Question 5

The median palatal suture is located between the two ____ of the maxillA.

A) Inferior nasal conchae
B) Nasal cavities
C) Palatine processes
D) Maxillary sinuses

Question 6

Cancellous bone is the soft, ____ bone located between two layers of ____ cortical bone.

A) Spongy; spongy
B) Dense; dense
C) Spongy; dense
D) Dense; spongy

Question 7

Cortical bone is also referred to as:

A) Trabecular bone.
B) Spongy bone.
C) Cancellous bone.
D) Compact bone.

Question 8

A ____ is defined as a marked prominence or projection of bone.

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

Question 9

On a periapical radiograph, the median palatal suture appears as a thin ____ line between the ____.

A) Radiopaque; maxillary lateral incisor and cuspid
B) Radiolucent; maxillary lateral incisor and cuspid
C) Radiopaque; maxillary central incisors
D) Radiolucent; maxillary central incisors

Question 10

A foramen is a(n):

A) Opening or hole in bone that permits the passage of nerves and blood vessels.
B) Broad, shallow, scooped-out or depressed area of bone.
C) Hollow space, cavity, or recess in bone.
D) Sharp, thornlike projection of bone.

Question 11

____ bone appears predominantly radiopaque, and ____ bone appears predominantly radiolucent.

A) Cortical; cancellous
B) Cancellous; cortical
C) Trabecular; compact
D) Spongy; cortical

Question 12

Which of the following radiographic landmarks would appear radiolucent?

A) Septum
B) Suture
C) Tubercle
D) Tuberosity

Question 13

Which type of bone is composed of bony trabeculae?

A) Cortical
B) Dense
C) Compact
D) Cancellous

Question 14

On a ____ periapical radiograph, the incisive foramen appears as a small, ovoid or round ____ area located between the roots of the central incisors.

A) Maxillary; radiopaque
B) Maxillary; radiolucent
C) Mandibular; radiopaque
D) Mandibular; radiolucent

Question 15

A suture is a(n):

A) Movable joint between any two bones in the body.
B) Immovable joint between any two bones in the body.
C) Movable joint between two bones in the skull.
D) Immovable joint between two bones in the skull.

Question 16

The ____ the trabeculations, the ____ radiolucent the area of cancellous bone appears.

A) Smaller; more
B) Larger; more
C) Larger; less
D) Both a and b

Question 17

A ____ is a tubelike passageway through bone that contains nerves and blood vessels.

A) Canal
B) Foramen
C) Fossa
D) Sinus

Question 18

A ridge is defined as a ____ of bone.

A) Linear prominence or projection
B) Sharp, thornlike projection
C) Small bump or nodule
D) Rounded prominence

Question 19

A ____ is a bony wall or partition that divides two spaces or cavities.

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

Question 20

The ____ is an opening or hole in bone that is located in the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors.

A) Mental foramen
B) Foramen ovale
C) Greater palatine foramen
D) Incisive foramen

Question 21

The hamulus extends from the:

A) Medial pterygoid plate of the sphenoid bone.
B) Lateral pterygoid plate of the sphenoid bone.
C) Styloid process.
D) Maxillary tuberosity.

Question 22

The lateral walls of the nasal cavity are formed by the ____ bone and the maxillae.

A) Temporal
B) Sphenoid
C) Ethmoid
D) Zygomatic

Question 23

Bony septa and nutrient canals may be seen within the walls of the:

A) Median palatal suture.
B) Maxillary sinus.
C) Incisive foramen.
D) Anterior nasal spine.

Question 24

On a maxillary periapical radiograph, the anterior nasal spine appears as a ____-shaped radiopaque area located at the intersection of the floor of the nasal cavity and the nasal septum.

A) T
B) U
C) V
D) I

Question 25

On a maxillary periapical radiograph, the inferior nasal conchae appear as a ____ mass within the nasal cavity.

A) Well-demarcated radiolucent
B) Well-demarcated radiopaque
C) Diffuse radiolucent
D) Diffuse radiopaque

Question 26

On a radiograph, the lateral fossa appears as a ____ area of ____ appearance, depending on the anatomy of the individual.

A) Radiopaque; consistent
B) Radiolucent; consistent
C) Radiopaque; variable
D) Radiolucent; variable

Question 27

The genial tubercles serve as attachments for the ____ muscles.

A) Digastric and genioglossus
B) Genioglossus and geniohyoid
C) Geniohyoid and digastric
D) Mylohyoid and geniohyoid

Question 28

The anterior nasal spine is located at the ____ portion of the nasal cavity.

A) Anterior and superior
B) Anterior and inferior
C) Posterior and superior
D) Posterior and inferior

Question 29

On a maxillary periapical radiograph, the floor of the nasal cavity appears as a ____ band of bone ____ the maxillary incisors.

A) Radiolucent; above
B) Radiolucent; below
C) Radiopaque; above
D) Radiopaque; below

Question 30

On a periapical radiograph, the genial tubercles appear as a ring-shaped ____ the apices of the mandibular incisors.

A) Radiolucency below
B) Radiolucency above
C) Radiopacity below
D) Radiopacity above

Question 31

On a maxillary periapical radiograph, the zygomatic process appears as a ____ to the maxillary first molar region.

A) radiolucency located inferior
B) radiopacity located superior
C) radiolucency located superior
D) radiopacity located inferior

Question 32

The inverted Y refers to the intersection of the maxillary sinus and the:

A) Median palatal suture.
B) Anterior nasal spine.
C) Incisive foramen.
D) Nasal cavity.

Question 33

The maxillary tuberosity appears as a ____ bulge distal to the ____ molar region.

A) Radiolucent; first
B) Radiolucent; third
C) Radiopaque; first
D) Radiopaque; third

Question 34

The lingual foramen is surrounded by the:

A) Mental foramen.
B) Genial tubercles.
C) Anterior nasal spine.
D) Internal oblique ridge.

Question 35

The maxillary sinuses are located above the ____ teeth.

A) Incisor
B) Premolar
C) Molar
D) Premolar and molar

Question 36

On a maxillary periapical radiograph, the nasal septum may be superimposed over the:

A) Canine.
B) Median palatal suture.
C) Greater palatine foramen.
D) Genial tubercles.

Question 37

The lateral fossa is located between the:

A) Maxillary canine and lateral incisor.
B) Mandibular canine and lateral incisor.
C) Maxillary canine and first premolar.
D) Mandibular canine and first premolar.

Question 38

The inferior nasal conchae extend from the:

A) Medial walls of the maxillary sinus.
B) Lateral walls of the maxillary sinus.
C) Medial walls of the nasal cavity.
D) Lateral walls of the nasal cavity.

Question 39

The ____ is the portion of the mandible that encases and supports the teeth.

A) Ramus
B) Coronoid process
C) Body
D) Alveolar process

Question 40

The inverted Y is a ____ line above the maxillary ____.

A) Radiopaque; canine
B) Radiopaque; first molar
C) Radiolucent; canine
D) Radiolucent; first molar

Question 41

When the internal and external oblique ridges appear separate, the ____ band is the external oblique ridge.

A) Superior radiopaque
B) Superior radiolucent
C) Inferior radiopaque
D) Inferior radiolucent

Question 42

The ____ is found in the submandibular fossA.

A) Inferior alveolar nerve
B) Submandibular salivary gland
C) Mylohyoid muscle
D) Lingual nerve

Question 43

On a radiograph, the mylohyoid ridge is a ____ band that may appear to be continuous with the ____.

A) Radiolucent; internal oblique ridge
B) Radiolucent; external oblique ridge
C) Radiopaque; internal oblique ridge
D) Radiopaque; external oblique ridge

Question 44

The coronoid process may be seen on a ____ periapical film.

A) Maxillary incisor
B) Maxillary molar
C) Mandibular incisor
D) Mandibular molar

Question 45

Interdental nutrient canals are most often seen in the:

A) Anterior maxilla.
B) Anterior mandible.
C) Posterior maxilla.
D) Posterior mandible.

Question 46

Which of the following tooth structures is most radiolucent?

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

Question 47

On a mandibular periapical radiograph, the mandibular canal is a ____ band that appears below or superimposed over the apices of the mandibular ____ teeth.

A) Radiolucent; incisor
B) Radiolucent; molar
C) Radiopaque; incisor
D) Radiopaque; molar

Question 48

Which of the following tooth structures is most radiopaque?

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

Question 49

On a periapical radiograph, the submandibular fossa appears as a ____ area in the molar region ____ the mylohyoid ridge.

A) Radiopaque; above
B) Radiopaque; below
C) Radiolucent; above
D) Radiolucent; below

Question 50

The ____ is a linear prominence of bone extending from the molar region downward on the internal surface of the mandible.

A) External oblique ridge
B) Mylohyoid ridge
C) Internal oblique ridge
D) Symphysis

Question 51

The external oblique ridge typically ends in the ____ molar region.

A) Maxillary first
B) Mandibular first
C) Maxillary third
D) Mandibular third

Question 52

The ____ is an opening or hole in bone located on the external surface of the mandible in the region of the mandibular premolars.

A) Nutrient canal
B) Mental fossa
C) Lingual foramen
D) Mental foramen

Question 53

Radiographically, the mental ridge often appears superimposed over the ____ teeth.

A) Maxillary anterior
B) Maxillary posterior
C) Mandibular anterior
D) Mandibular posterior

Question 54

The internal oblique ridge may end in the region of the mandibular ____ molar, or it may continue on as the ____ ridge.

A) First; mylohyoid
B) Third; mylohyoid
C) First; external oblique
D) Third; external oblique

Question 55

The mental ridge is located on the ____ portion of the mandible.

A) External surface of the anterior
B) Internal surface of the anterior
C) External surface of the posterior
D) Internal surface of the posterior

Question 56

Nutrient canals appear as ____ lines on a periapical radiograph.

A) Vertical radiolucent
B) Horizontal radiolucent
C) Vertical radiopaque
D) Horizontal radiopaque

Question 57

The ____ is the wall of the tooth socket that surrounds the root of a tooth.

A) Alveolar crest
B) Residual ridge
C) Periodontal ligament space
D) Lamina dura

Question 58

On a dental radiograph, the alveolar crest is typically located ____ mm below the junction of the crown and the root surfaces.

A) 0.5 to 1.0
B) 1.5 to 2.0
C) 2.0 to 3.0
D) 1.5 to 3.0

Question 59

The mental foramen is frequently misdiagnosed as a ____ because of its apical location.

A) Dentigerous cyst
B) Radicular cyst
C) Periapical granuloma
D) Odontoma

Question 60

The mental fossa is located ____ the mental ridge in the mandibular ____ region.

A) Above; incisor
B) Below; incisor
C) Above; premolar
D) Below; premolar

Question 61

The alveolar crest in the posterior region tends to appear ____ dense and ____ radiopaque than the alveolar crest seen in the anterior region.

A) Less; less
B) More; more
C) Less; more
D) More; less

Question 62

On a dental radiograph, the periodontal ligament space (PDL) space appears as a ____ line around the root of a tooth.

A) Thin radiopaque
B) Thin radiolucent
C) Wide radiopaque
D) Wide radiolucent