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D2 Fall - Radiology > 10/29: Panoramic Positioning Issues > Flashcards

10/29: Panoramic Positioning Issues Flashcards

1
Q
A

ghost of glasses

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2
Q
A

ghost of earrings

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3
Q
A

ghost of lead apron

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4
Q
A

ghost of hairpins

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5
Q
A

dentures

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6
Q

when taking a pano, should they remove dental appliances such as dentures/RPD?

A

yes

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7
Q

what are the 5 parts of proper positioning?

A

teeth and jaw are sharply depicted
slight curve to occlusal plane
no air space obstructing maxillary roots
equal magnification
no ghost image of cervical spine

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8
Q
A

to far forward

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9
Q

what happens when you are too far forward?

A

cervical spine overlaps ramus
anterior teeth are small and narrow

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10
Q

what happens when you are too far back?

A

anterior teeth are widen
inferior turbinates and meati are across maxillary sinuses

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11
Q
A

too far back

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12
Q
A

too far back

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13
Q

this is when you have excessive curvature on the occlusal plane

A

chin down

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14
Q
A

chin down

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15
Q
A

chin up

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16
Q

this is when you have a flat occlusal plane, or reverse

A

chin up

17
Q

this is when you have unequal magnification of the left and right side

A

head turned

18
Q
A

head turned to right

19
Q
A

head turned left

20
Q

what happens when you are slumped?

A

cervical spine ghost is too opaque

21
Q
A

slumped

22
Q
A

tongue not on roof

23
Q
A

partial panoramic image

24
Q
A

patient moved

25
Q
A

patient moved

26
Q

what is the cause of wide anterior teeth?

A

too far back

27
Q

what causes flat occlusal plane?

A

chin up

28
Q

what causes ghost image of cervical spine?

A

slumped

29
Q

what causes a double real image of the cervical spine?

A

too far forward

30
Q

what is the distortion if teh teeth are located outside of the central plane towards the rotational center?

A

stretched wide in a horizontal direction

31
Q

the hard palate is superimposed on the maxillary roots

A

chin up

32
Q

what occurs when you are too far forward?

A

anterior teeth are narrow
doubel cervical spine image

33
Q

what occurs when you are too far back?

A

condyles are cut off
inferior turbinate and meati are on maxillary sinus
anterior teeth widened

34
Q

the rami/condyles are tipped inward in

A

chin down

35
Q

when is the hyoid superimposed on the mandible?

A

chin down

36
Q

what occurs in chin down?

A

large occlusal curve
hyoid bone superimposed on mandible
condyles are close to or cut off
rami/condyles are tipped inwards

37
Q

what occurs in chin up?

A

flat occlusal or reversed
rami/condyles tipped laterally
hard palate superimposed on maxillary apices

D2 Fall - Radiology (22 decks)

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