07 Normal radiographic anatomy Flashcards

1
Q

midpalatal suture

A

thin vertical radiolucent line between roots of maxillary central incisors

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2
Q

anterior maxillary structures

A

midpalatal suture, soft tissue outline of nose, nasal fossa, nasal septum, incisive foramen, anterior nasal spine, incisive foramen

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3
Q

floor of nasal fossa

A

radiolucent because they contain air, floor appears at a thin line above maxillary incisors

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4
Q

nasal septum

A

comprised of cartilage and vomer bone, between nasal fossa

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5
Q

anterior nasal spine

A

radiopaque ridge near nasal septum, most anterior point of maxilla

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6
Q

incisive foramen

A

ovoid radiolucency between roots of maxillary centrals, paired incisive canals may also be visible

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7
Q

lateral fossa

A

radiolucent concavity in maxilla between roots of laterals and canines, more prominent in some patients

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8
Q

lateral canine area

A

inverted radiopaque Y is the floor of the nasal fossa and the medial wall of the maxillary sinus, useful to ID canine area in edentulous surveys

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9
Q

maxillary sinus

A

walls appear as thin radiopaque lines, space is radiolucent

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10
Q

malar process

A

J or U shaped radiopacity typically over the roots of maxillary first molars, sometimes visible superimposed on maxillary sinus

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11
Q

sinus septations

A

vertical radiopaque lines, may be membranous or bony and usually only partial septations

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12
Q

PSA canal

A

posterior superior alveolar neurovascular bundle passes through maxillary sinus, often seen in maxillary molar PA as horizontal radiolucent band

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13
Q

maxillary tuberosity

A

visible posterior to maxillary molars

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14
Q

hamular process

A

thin vertical radiopaque line posterior to maxillary tuberosity, landmark necessary when making maxillary dentures

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15
Q

nasolabial fold

A

soft tissue outline sometimes seen in maxillary premolar PA when mouth is partially open

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16
Q

coronoid process

A

may be in maxillary premolar PA, especially when patient’s mouth is open

17
Q

oblique ridges

A

external oblique is thickened radiopaque line that crosses mandibular 2nd and 3rd molars at CEJ, internal (mylohyoid) oblique on lingual surface crosses near apices of 2nd and 3rd molars

18
Q

mandibular canal

A

transmits IAN bundle through mandible, horizontal radiolucent band below roots of molars in PA

19
Q

mental foramen

A

ovoid radiolucency inferior to the mandibular premolars

20
Q

genial tubercles

A

2 superior, 2 inferior around lingual foramen

21
Q

lingual foramen

A

small radiolucent circle surrounded by genial tubercles and below the mandibular central incisors

22
Q

submandibular fossa

A

radiolucent area inferior to internal (mylohyoid) ridge, more prominent in some patients

23
Q

nutrient canals

A

thin radiolucent lines in interdental bone, neurovasclar bundles supplying local bone and gingiva, more obvious in edentulous

24
Q

extraction socket

A

radiolucency in shape of roots, will fill completely with time

25
Q

radicular development

A

root development visible on radiographs