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oral radiology > maxillary anatomy > Flashcards

maxillary anatomy Flashcards

1
Q

Lamina Dura

A

The teeth sockets are
bounded by a thin
radiopaque layer of dense
bone.

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2
Q
A

lamina dura

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3
Q

Alveolar Crest

A

Is the gingival margin of the alveolar
process between teeth (radiopaque
line).

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4
Q
A

alveolar crest

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5
Q
A

alveolar crest

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6
Q

Periodontal Ligament Space

A

It appears as a radiolucent space
between the tooth root and the
lamina dura

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7
Q
A

PDL space

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8
Q

A double periodontal ligament space and lamina dura (arrows) may be seen when?

A

when there is a convexity of the proximal surface of the root resulting in two heights of contour.

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9
Q

Cancellous or trabecular Bone

A

The cancellous bone lies between the cortical
plates in both jaws.

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10
Q
A

trabecular plates

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11
Q
A

marrow spaces

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12
Q

Anterior Nasal Spine

A

Anterior Nasal Spine
It is usually at or just below the
junction of the inferior end of the
nasal septum and the inferior
outline of the nasal aperture.

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13
Q
A

ant nasal spine

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14
Q
A

ant nasal spine

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15
Q

Intermaxillary Suture

A

▪Median suture
▪Extends from alveolar crest between #8 and #9 posteriorly to distal aspect of hard palate
▪Uniform width
▪Variable shape due to Angulation of central ray

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16
Q
A

intermaxillary suture

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17
Q
A

intermaxillary suture

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18
Q

Nasopalatine canal

A

▪Transmits nasopalatine nerves and vessels
▪Terminates in incisive foramen
▪Entrance foramina: two usually round or oval foramina in
the floor of the nasal cavity.
▪Not always seen

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19
Q

nasopalatine canal anatomy

A
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20
Q
A

stensen foramen of NP canal

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21
Q

green arrows

A

stensen foramen

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22
Q

Incisive Foramen

A

Incisive Foramen
▪Is the oral end of the nasopalatine canal
▪Variable size and shape
▪Variable position, due to x-ray beam angulation

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23
Q
A

incisive foramen

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24
Q
A

incisive foramen

25
Q

Nasal cavity

A

▪Is located above the oral cavity.
▪Its floor is seen as a thin
radiopaque line

26
Q
A

nasal cavity

27
Q
A

nasal cavity

28
Q

lateral? posterior?

extensions of the nasal cavity

A

Floor of the nasal cavityextending laterally from the anterior nasal spine.
The floor of the nasal aperture (arrows) extends posteriorly, superimposed over the maxillary sinus.

29
Q
A

inf nasal concha

30
Q
A

nasal septum

31
Q

MAXILLARY SINUS

A

MAXILLARY SINUS
▪Is an air-containing cavity lined with mucous membrane.
▪The borders appear in periapical radiographs as a thin and radiopaque line near apices
▪May have internal septa

32
Q
A

inf border of max sinus

33
Q

mx sinus response to missing teeth

A

The floor of the maxillary sinus (arrows) often extends toward the crest of the alveolar ridge in response to missing teeth

34
Q
A

max sinus with missing teeth

35
Q
A

septum in max sinus

36
Q
A

neurovascular canals in the wall of the max sinus

37
Q
A

neurovascular canals in the wall of the max sinus

38
Q

What is the “Inverted Y”?

A

Formed by nasal fossa
and maxillary sinus

39
Q
A

inverted Y
max sinus and nasal fossa

40
Q

Nose in radiographs

A

▪The soft tissue of the tip of the nose
can be seen in projections of the
maxillary incisors, superimposed over
the roots.

41
Q
A

nose soft tissue

42
Q

Lateral Fossa

A

Lateral Fossa
▪Is a depression in the maxilla near
the apex of the lateral incisor.
▪It is formed by a depression in the
maxilla at this location.
The lateral fossa is a diffuse radiolucency in the region of the lateral incisor.

43
Q
A

lateral fossa

44
Q
A

lateral fossa

45
Q

Nasolacrimal Canal

A

▪Runs from the orbit inferiorly
to the nasal cavity.
Occasionally seen near the apex of the canine
when steep vertical angulation is used.
The nasolacrimal canals are commonly seen as ovoid radiolucencies on maxillary occlusal projections.

46
Q
A

NL canal

47
Q
A

NL canal

48
Q

ZYGOMATIC PROCESS OF
THE MAXILLA

A

▪The zygomatic process of the maxilla is anextension of the lateral maxillary surface that articulates with the maxillary process of the zygoma.

49
Q
A

zygomatic process

50
Q
A

zygomatic process

51
Q
A

zygoma

52
Q

NASOLABIAL FOLD

A

▪Radiographically is an oblique line
demarcating a region that appears
to be covered by a veil of slight
radiopacity.
▪Frequently traverses periapical
radiographs of the premolar region.
The nasolabial soft tissue fold extends across the canine-premolar region.

53
Q
A

Nasolabial fold

54
Q

distal area

A

tuberosity

55
Q

Pterygoid Plates and Hamular notch

A

▪The medial and lateral pterygoid
plates lie immediately posterior to
the tuberosity of the maxilla.

56
Q
A

hamular process

57
Q
A

pterygoid plates posterior to tuberosity

58
Q
A

hamular process

oral radiology (22 decks)

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