Panoramic positioning errors Flashcards by Louise Schmanke

What is important for panoramic proper positioning?

Patient positioning and head alignment

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What do patients need to remove for a panoramic radiograph?

Dental appliances
Earrings
Necklaces
Hairpins
Glasses

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What is wrong with this image?

glasses

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earrings

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necklace

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hairpins

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removable prosthodontic device

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What should you be able to see with proper positioning for a panoramic?

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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What is wrong with this image?

Too far forward

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What happens if a panoramic is taken too far forward?

Anterior teeth narrowed and blurred.
Cervical spine superimposed on ramus (double real image of cervical spine)

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too far forward

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too far back

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What happens if a panoramic is taken too far back?

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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What is wrong with this image?

too far back

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What is wrong with this image?

Inferior turbinates and meati spread across maxillary sinuses (too far back)
(also ghost image of earrings?-haley)

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What is wrong with this image?

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chin down

What happens if a panoramic is taken with the chin down?

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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.

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chin down

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chin down and too far forward

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chin up

What happens if a panoramic is taken with the chin up?

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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.

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chin up

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head turned

What happens if a panoramic is taken with the head turned?

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Unequal magnification of left and right side (teeth, ramus)
Increased blurring and overlapping of contacts on one side.

When head is turned to the right, the posterior right dentition moves farther from the sensor so the teeth will project ________ on the radiographic image

wider

When head is turned to the right, the posterior left dentition moves closer to the sensor so the teeth will project _________ on the radiographic image

narrower

What is wrong with this image?