intraoral anatomy- maxillary Flashcards

1
Q

the teeth sockets are bounded by a thin radiopague layer of dense bone

A

lamina dura

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2
Q

if tooth is gone, do we still have lamina dura

A

no (because reacts on stimulus)

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3
Q

space between cementum and lamina dura

A

PDL space

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4
Q

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

A

alveolar crest

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5
Q

radipaque highest to lowest of tooth

A

enamel>dentin

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6
Q

mm from alveolar crest to CEJ

A

1-2mm

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7
Q

it appears as radiolucent space between tooth root and the lamina dura

A

periodontal ligament space

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8
Q

double peridontal ligament and lamina dura may be seen when there is a

A

convexity(concavities) of the proximal surface of the root resulting in two heights of contour

or could be another root we dk

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9
Q

the cancellous bone lies between the cortical plates in both jaws

A

cancellous or trabecular bone

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10
Q

inbetween trabecular bone we have

A

marrow spaces

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11
Q

usually at or just below the junction of the inferior end of the nasal septum and the inferior outline of the nasal aperture

A

anterior nasal spine

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12
Q

-median suture
-uniform width
-variable shape (angulation of centray ray)

A

intermaxillary suture

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13
Q

where does intermaxillary suture extend from

A

from alveolar crest between 8 and 9 posteriorly to distal aspect of hard palate

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14
Q

intermaxillary suture radiopaque or lucent?

A

radiolucent

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15
Q

-transmits nasopalatine nerves and vessels

A

nasopalatine canal

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16
Q

connects nasal cavity to oral cavity

A

nasopalatine canal

17
Q

the nasopalatine canal terminates in

A

incisive formaen

18
Q

enterance foramina for nasapalatine canal

A

two usually round or oval foramen in the floor of the nasal cavity
-not always seen

19
Q

the superior foramina of the nasopalatine canal appear just lateral to the :
and posterior to:

A

nasal septum (divides the two foramens)

anterior nasal spine

20
Q

the lateral walls of the nasopalatine canal extend from the ____ to the _____

A

incisive foramen to the floor of the nasal fossa

21
Q

is the oral end of the nasopalatine canal
-variable size and shape and position due to xray beam angulation

A

incisive foramen

22
Q

located above the oral cavity
-its floor is seen as a thin radiopaque line
v shape

A

nasal cavity

23
Q

the floor of the nasal aperture extends posteriorly, superimposed over the

A

max sinus

24
Q

straight line:
bump line:

A

straight line: floor of nasal cavity
bump line: sinus

25
Q

where sinus and floor of nasal cavity meet (around level of premolars)

A

inverted Y

nota actual anatomical definition

26
Q

-air-containing cavity lined with mucous membrane
-borders appear in peri-apical radiographs as a thin and radiopaque
-may have internal septa

-wavey borders!!!! NOT straight

A

maxillary sinus

27
Q

the inferior border of the max sinus apepars as a thin radiopaque line near the

A

apices of the max premolars and molars

28
Q

formed by nasal fossa and max sinus

A

inverted Y (most of time at level of premolars)

29
Q

soft tissue of tip of nose can be seen in projections of the max incisors, superimposed over the roots

A

nose

30
Q

depression in maxilla near the apex of the lateral incisor

A

lateral fossa

31
Q

this is formed by a depression in the maxilla at this location

A

lateral fossa

32
Q

runs from the orbit inferiorly to the nasal cavity

A

nasolacrimal canal
(drains tears to nose)

33
Q

this is occasionally seen near the apex of the canine when steep vertical angulation is used

commonly seen as ovoid radiolucencies on maxillary occlusal projections

A

nasolacrimal canal

34
Q

in maxilla, is an extension of the lateral maxillary surface that articulates with the maxillary process of the zygoma

radiopaque

A

zygomatic process of the maxilla

35
Q

protrudes laterally from maxillary wall.
its size may be quite variable: small with thick borders or large with thin borders

A

zygomatic process of maxilla

36
Q

radiographically is an oblique line demarcating a region that appears to be covered by a veil of slight radiopacity

A

nasolabial fold

37
Q

frequently traverses periapical radiographs of the premolar region

A

nasolabial fold

38
Q

these lie immediately posterior to the tuberosity of the maxilla

A

the medial and lateral pterygoid plates

(hamular notch is noted)
(part of sphenoid bone)