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D2 Summer > Radiology - Intraoral Anatomy > Flashcards

Radiology - Intraoral Anatomy Flashcards

1
Q

Order of radiographic density of structures (from most radiopaque -> radiolucent)

A

Enamel (radiopaque)
Cortical bone
Dentin/cementum
Alveolar bone
Pulp chambers and canals
PDL space (radiolucent)

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2
Q

Densest structure found in human body

A

Enamel

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3
Q

On an X-ray: outermost radiopaque layer of crown of a tooth

A

Enamel

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4
Q

Found beneath enamel layer of a tooth and surrounds pulp cavity

A

Dentin

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5
Q

Makes up majority of tooth structure

A

Dentin

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6
Q

On an X-ray: appears radiopaque, but not as radiopaque as enamel

A

Dentin

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7
Q

________ is not usually apparent radiographically bc the contrast between it and dentin is so low and the __________ layer is so thin

A

cementum; cementum

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8
Q

When is the only time you could see cementum on an X-Ray?

A

Hypercementosis

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9
Q

Contains blood vessels, nerves, and lymphatics

A

Pulp chamber/root canals

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10
Q

On an X-Ray: appears relatively radiolucent

A

Pulp chamber/root canals

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11
Q

Space between the root of the tooth and the lamina dura

A

PDL space

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12
Q

Contains connective tissue fibers, blood vessels, and lymphatics

A

PDL space

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13
Q

On an X-Ray: a thin radiolucent line around the root of a tooth

A

PDL space

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14
Q

On an X-Ray: In the healthy periodontium - continuous radiolucent line of uniform thickness

A

PDL space

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15
Q

Wall of the tooth socket that surrounds the root of a tooth; made up of dense cortical bone

A

Lamina dura

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16
Q

On an X-Ray: dense radiopaque line that surrounds the root of a tooth

A

Lamina dura

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17
Q

Most coronal portion of alveolar bone found between teeth

A

Alveolar crest

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18
Q

Made up of dense cortical bone and is continuous with the lamina dura

A

Alveolar crest

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19
Q

On an X-Ray: appears radiopaque and is typically located 1.5 to 2.0 mm below the junction of the
crown and the root surfaces (the cemento-
enamel junction)

A

Alveolar crest

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20
Q

Supports and encases the roots of teeth

A

Alveolar bone

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21
Q

On an X-Ray:
trabeculae - radiopaque lines
medullary spaces – radiolucent areas

A

Alveolar bone

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22
Q

On an X-Ray: radiolucent region at the apex of teeth in formation

A

Dental papilla space

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23
Q

On an X-Ray: radiolucent area between the crown of an unerupted tooth and the surrounding bone

A

Dental follicle space

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24
Q

Suture present between the palatine processes and the anterior portion of the maxilla

A

Intermaxillary suture

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25
Q

On an X-Ray: radiolucent line, in the midline, between the central incisors

A

Intermaxillary suture

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26
Q

Exit of the nasopalatine canal

A

Incisive foramen

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27
Q

On an X-Ray: ovoid radiolucency, often with diffuse borders

A

Incisive foramen

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28
Q

On an X-Ray: bilateral circular or ovoid radiolucent image

A

Nasal opening of nasopalatine canal

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29
Q

Bone cavities filled with air divided by
the nasal septum

A

Nasal fossae

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30
Q

On an X-Ray: radiolucent area in maxilla

A

Nasal fossae

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31
Q

Wafer-thin, curved plates of bone that extend from the lateral walls of the nasal cavity

A

Inferior nasal concha

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32
Q

On an X-Ray: radiopaque structure extending from the lateral walls of the nasal cavity

A

Inferior nasal concha

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33
Q

Divides the nasal cavity into two fossae

A

Nasal septum

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34
Q

On an X-Ray: vertical radiopaque structure on maxilla

A

Nasal septum

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35
Q

On an X-Ray: radiopaque line located in the lower portion of the nasal cavity (in the
projection of incisors and canines)

A

Floor of nasal cavity

36
Q

Bony projection formed by the fusion of the two maxillary bones at the intermaxillary suture

A

Anterior nasal spine

37
Q

On an X-Ray: radiopaque V–shaped line on maxilla

A

Anterior nasal spine

38
Q

On an X-Ray: radiolucent area located between the canine and the lateral incisor

A

Lateral fossa

39
Q

The most posterior region of the alveolar
process of the maxilla

A

Maxillary tuberosity

40
Q

On an X-Ray: bone radiopacity on maxilla

A

Maxillary tuberosity

41
Q

Hook-like process at the lower part of the
medial pterygoid plate of the sphenoid bone

A

Pterygoid hamulus

42
Q

On an X-Ray: radiopaque hook-like image on maxilla

A

Pterygoid hamulus

43
Q

On an X-Ray: wide radiolucent area bounded by a radiopaque line

A

Maxillary sinus

44
Q

On an X-Ray: thin radiopaque line located in the lower portion of the maxillary sinus

A

Floor of maxillary sinus

45
Q

On an X-Ray: radiolucent areas that extend towards the alveolar ridge

A

Alveolar extension of the maxillary sinus

46
Q

On an X-Ray: radiolucent areas that extend towards the maxillary tuberosity

A

Tuberosity extension of the maxillary sinus

47
Q

On an X-ray: radiolucent areas that extend anteriorly

A

Anterior extension of the maxillary sinus

48
Q

On an X-ray: radiopaque line around part of the dental root, in cases of alveolar extension
of the maxillary sinus

A

Alveolar dome

49
Q

Thin cortical bone protruding through the maxillary sinus

A

Bone septa of the maxillary sinus

50
Q

On an X-Ray: thin radiopaque line projected on the maxillary sinus

A

Bone septa of the maxillary sinus

51
Q

Superimposition of the floor of the nasal fossa
and the anterior border of the maxillary sinus

A

Y line of Ennis

52
Q

On an X-Ray: radiopaque line in inverted “Y” format

A

Y line of Ennis

53
Q

Anatomic structures of the alveolar bone
through which neurovascular elements
transit

A

Nutrient canals

54
Q

Bony projection of the maxilla that
articulates with the zygomatic bone

A

Zygomatic process of maxilla

55
Q

On an X-Ray: J-shaped or U-shaped radiopacity located superior to the maxillary first molar region

A

Zygomatic process of maxilla

56
Q

Articulates with the zygomatic process of the
maxilla; composed of dense cortical bone

A

Zygomatic bone

57
Q

On an X-Ray: appears as a diffuse radiopaque band extending posteriorly from the zygomatic process of the maxilla

A

Zygomatic bone

58
Q

Marked prominence of bone on the anterior ramus of the mandible

A

Coronoid process of mandible

59
Q

On an X-Ray: triangular radiopacity superimposed over, or inferior to, the maxillary tuberosity region

A

Coronoid process of mandible

60
Q

Linear prominence of cortical bone located on the external surface of the anterior portion of the mandible

A

Mental ridge

61
Q

On an X-Ray: thick radiopaque lines that extends from the premolar region to the incisors’ region on mandible

A

Mental ridge

62
Q

Depression on the labial aspect of the mandible
extending laterally from the midline and above the mental ridge

A

Mental fossa

63
Q

On an X-Ray: radiolucent area above the mental ridge

A

Mental fossa

64
Q

Opening in bone located on the internal surface of the mandible

A

Lingual foramen

65
Q

On an X-Ray: small, radiolucent dot located inferior to the apices of the mandibular incisors

A

Lingual foramen

66
Q

On an X-Ray: surrounded by genial tubercles

A

Lingual foramen

67
Q

Bone protuberances that serve as attachment sites for the genioglossus and geniohyoid muscles, located on the lingual aspect of the midline of the mandible

A

Genial tubercles

68
Q

On an X-Ray: ring-shaped radiopacity in the midline inferior to the apices of the mandibular incisors

A

Genial tubercles

69
Q

Opening in bone located on the external surface of the mandible in the region of the mandibular premolars

A

Mental foramen

70
Q

Anterior limit of the inferior dental canal that is apparent on periapical radiographs

A

Mental foramen

71
Q

On an X-Ray: small, ovoid or round radiolucent area located in the apical region of the mandibular premolars

A

Mental foramen

72
Q

On an X-Ray: may be misdiagnosed as a periapical lesion (periapical cyst, granuloma, or abscess) because of its apical location, in some cases

A

Mental foramen

73
Q

Passageway through bone that travels the length of the mandible

A

Mandibular canal

74
Q

Extends from the mandibular foramen to the mental foramen and houses the inferior alveolar nerve and blood vessels

A

Mandibular canal

75
Q

On an X-Ray: radiolucent band, with two thin radiopaque lines that represent the cortical walls of the canal

A

Mandibular canal

76
Q

On an X-Ray: appears below or superimposed over the apices of the mandibular molar teeth

A

Mandibular canal

77
Q

Linear prominence of bone located on the internal surface of the mandible

A

Mylohyoid ridge

78
Q

Serves as an attachment site for the mylohyoid muscle

A

Mylohyoid ridge

79
Q

On an X-Ray: dense radiopaque band that extends downward and forward from the third molar region at the level of the apices of the posterior teeth

A

Mylohyoid ridge

80
Q

Linear prominence of bone located on the external surface of the body of the mandible

A

External oblique ridge

81
Q

On an X-Ray: radiopaque band extending downward and forward from the anterior border of the ramus of the mandible

A

External oblique ridge

82
Q

Depressed area of bone located on the internal surface of the mandible inferior to the mylohyoid ridge that accommodates the submandibular gland

A

Submandibular gland fossa

83
Q

On an X-Ray: radiolucent area in the molar region below the mylohyoid ridge

A

Submandibular gland fossa

84
Q

On an X-Ray: dense, broad, radiopaque band of bone on the mandible

A

Inferior border of mandible

85
Q

Interdental nutrient canals are most often seen in the ____________ ____________, a region that typically has thin bone

A

anterior mandible

D2 Summer (37 decks)

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