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D2 Summer > Radiology - Intraoral Anatomy > Flashcards

Radiology - Intraoral Anatomy Flashcards

(85 cards)

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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
On an X-Ray: radiolucent line, in the midline, between the central incisors
Intermaxillary suture
26
Exit of the nasopalatine canal
Incisive foramen
27
On an X-Ray: ovoid radiolucency, often with diffuse borders
Incisive foramen
28
On an X-Ray: bilateral circular or ovoid radiolucent image
Nasal opening of nasopalatine canal
29
Bone cavities filled with air divided by the nasal septum
Nasal fossae
30
On an X-Ray: radiolucent area in maxilla
Nasal fossae
31
Wafer-thin, curved plates of bone that extend from the lateral walls of the nasal cavity
Inferior nasal concha
32
On an X-Ray: radiopaque structure extending from the lateral walls of the nasal cavity
Inferior nasal concha
33
Divides the nasal cavity into two fossae
Nasal septum
34
On an X-Ray: vertical radiopaque structure on maxilla
Nasal septum
35
On an X-Ray: radiopaque line located in the lower portion of the nasal cavity (in the projection of incisors and canines)
Floor of nasal cavity
36
Bony projection formed by the fusion of the two maxillary bones at the intermaxillary suture
Anterior nasal spine
37
On an X-Ray: radiopaque V–shaped line on maxilla
Anterior nasal spine
38
On an X-Ray: radiolucent area located between the canine and the lateral incisor
Lateral fossa
39
The most posterior region of the alveolar process of the maxilla
Maxillary tuberosity
40
On an X-Ray: bone radiopacity on maxilla
Maxillary tuberosity
41
Hook-like process at the lower part of the medial pterygoid plate of the sphenoid bone
Pterygoid hamulus
42
On an X-Ray: radiopaque hook-like image on maxilla
Pterygoid hamulus
43
On an X-Ray: wide radiolucent area bounded by a radiopaque line
Maxillary sinus
44
On an X-Ray: thin radiopaque line located in the lower portion of the maxillary sinus
Floor of maxillary sinus
45
On an X-Ray: radiolucent areas that extend towards the alveolar ridge
Alveolar extension of the maxillary sinus
46
On an X-Ray: radiolucent areas that extend towards the maxillary tuberosity
Tuberosity extension of the maxillary sinus
47
On an X-ray: radiolucent areas that extend anteriorly
Anterior extension of the maxillary sinus
48
On an X-ray: radiopaque line around part of the dental root, in cases of alveolar extension of the maxillary sinus
Alveolar dome
49
Thin cortical bone protruding through the maxillary sinus
Bone septa of the maxillary sinus
50
On an X-Ray: thin radiopaque line projected on the maxillary sinus
Bone septa of the maxillary sinus
51
Superimposition of the floor of the nasal fossa and the anterior border of the maxillary sinus
Y line of Ennis
52
On an X-Ray: radiopaque line in inverted "Y" format
Y line of Ennis
53
Anatomic structures of the alveolar bone through which neurovascular elements transit
Nutrient canals
54
Bony projection of the maxilla that articulates with the zygomatic bone
Zygomatic process of maxilla
55
On an X-Ray: J-shaped or U-shaped radiopacity located superior to the maxillary first molar region
Zygomatic process of maxilla
56
Articulates with the zygomatic process of the maxilla; composed of dense cortical bone
Zygomatic bone
57
On an X-Ray: appears as a diffuse radiopaque band extending posteriorly from the zygomatic process of the maxilla
Zygomatic bone
58
Marked prominence of bone on the anterior ramus of the mandible
Coronoid process of mandible
59
On an X-Ray: triangular radiopacity superimposed over, or inferior to, the maxillary tuberosity region
Coronoid process of mandible
60
Linear prominence of cortical bone located on the external surface of the anterior portion of the mandible
Mental ridge
61
On an X-Ray: thick radiopaque lines that extends from the premolar region to the incisors’ region on mandible
Mental ridge
62
Depression on the labial aspect of the mandible extending laterally from the midline and above the mental ridge
Mental fossa
63
On an X-Ray: radiolucent area above the mental ridge
Mental fossa
64
Opening in bone located on the internal surface of the mandible
Lingual foramen
65
On an X-Ray: small, radiolucent dot located inferior to the apices of the mandibular incisors
Lingual foramen
66
On an X-Ray: surrounded by genial tubercles
Lingual foramen
67
Bone protuberances that serve as attachment sites for the genioglossus and geniohyoid muscles, located on the lingual aspect of the midline of the mandible
Genial tubercles
68
On an X-Ray: ring-shaped radiopacity in the midline inferior to the apices of the mandibular incisors
Genial tubercles
69
Opening in bone located on the external surface of the mandible in the region of the mandibular premolars
Mental foramen
70
Anterior limit of the inferior dental canal that is apparent on periapical radiographs
Mental foramen
71
On an X-Ray: small, ovoid or round radiolucent area located in the apical region of the mandibular premolars
Mental foramen
72
On an X-Ray: may be misdiagnosed as a periapical lesion (periapical cyst, granuloma, or abscess) because of its apical location, in some cases
Mental foramen
73
Passageway through bone that travels the length of the mandible
Mandibular canal
74
Extends from the mandibular foramen to the mental foramen and houses the inferior alveolar nerve and blood vessels
Mandibular canal
75
On an X-Ray: radiolucent band, with two thin radiopaque lines that represent the cortical walls of the canal
Mandibular canal
76
On an X-Ray: appears below or superimposed over the apices of the mandibular molar teeth
Mandibular canal
77
Linear prominence of bone located on the internal surface of the mandible
Mylohyoid ridge
78
Serves as an attachment site for the mylohyoid muscle
Mylohyoid ridge
79
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
Mylohyoid ridge
80
Linear prominence of bone located on the external surface of the body of the mandible
External oblique ridge
81
On an X-Ray: radiopaque band extending downward and forward from the anterior border of the ramus of the mandible
External oblique ridge
82
Depressed area of bone located on the internal surface of the mandible inferior to the mylohyoid ridge that accommodates the submandibular gland
Submandibular gland fossa
83
On an X-Ray: radiolucent area in the molar region below the mylohyoid ridge
Submandibular gland fossa
84
On an X-Ray: dense, broad, radiopaque band of bone on the mandible
Inferior border of mandible
85
Interdental nutrient canals are most often seen in the ____________ ____________, a region that typically has thin bone
anterior mandible

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