pano positioning errors Flashcards

1
Q

components of positioning errors

A

pt position and head alignment

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2
Q

lips with pano

A

must be closed

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3
Q

what should pts remove with pano

A

Dental appliances
Earrings
Necklaces
Hairpins
Glasses

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4
Q

what dental appliances may not need to be remvoed for pano

A

those without metal

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5
Q
A

glasses on

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6
Q
A

necklace on

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7
Q
A

hairpins left in

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8
Q

PROPER POSITION for pano
* Teeth and jaws?
* occlusal plane?
* magnification?
* air space?
* No ghost image of?

A
  • Teeth and jaws sharply depicted.
  • Slight curvature of occlusal plane.
  • Equal magnification on left and right side.
  • No air space obstructing view of maxillary roots.
  • No ghost image of cervical spine in midline.
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9
Q

pt too far forward pano app

A
  • Anterior teeth narrowed and blurred= outside the focal trough
  • Cervical spine superimposed on ramus. (double real image of cervical spine).
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10
Q
A

pt too far forward

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11
Q
A

pt too far forward

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12
Q

pt too far back pano app

A

Anterior teeth widened and blurred.
* Inferior turbinates and meati spread across maxillary sinuses.
* Condyles close to or cut off side of image.

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13
Q
A

pt too far back

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14
Q
A

pt too far back

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15
Q

meati and turbinates?

A

Inferior turbinates and meati spread across maxillary sinuses= pt too far back

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16
Q

pt chin down pano app

A

Excessive curvature of occlusal plane.
* Roots of mandibular anterior teeth are blurred.
* Rami/condyles tipped inward.
* Condyles close to or cut off top of image.
* Hyoid bone superimposed on mandible.

17
Q
A

pt chin down

18
Q
A

pt chin down

19
Q

can there be more than one positioning error in pano?

20
Q

pt chin up pano app

A

Flat occlusal plane or reverse curvature.
* Roots of maxillary anterior teeth are blurred.
* Rami/condyles tipped laterally.
* Condyles close to or cut off side of image.
* Hard palate superimposed on maxillary apices.

21
Q
22
Q
23
Q

pano app if pt head is turned

A
  • Unequal magnification of left and right side (teeth, ramus)
  • Increased blurring and overlapping of contacts on side magnified
24
Q
A

pt head turned to the right

25
head rotation and the focal trough
when the head turns one way the contralateral posterior teeth will move closer to the sensor and project narrower on image the same side posteriors as the direction of roation will move further from the sensor thus appear magnified
26
what errors are here
head turned to the left palatoglossal air space
27
lateral translation of head effect on pano
could be due to failure to engage bitstick properly posterior teeth on same side as direction of translation are closer to sensor and will appear more narrow posterior teeth opposite of translation direction will be further from sensor and thus magnified
28
slumped pt pano app
ghost image of cervical spine
29
pt slumped
30
tongue not at roof of mouth
will produce palatoglossal airspace superimposed of mx PA
31
palatoglossal air space
32
palatoglossal airspace and open mouth
33
opacity?
lead apron artifact
34
opacities?
lead apron artifact and ghost image of cervical spine
35
partial pano image
36
pt movement pano app
can trace inf cortex of mandible to look for distortions
37
pt movement
38
pt movement