Panoramic positioning errors Flashcards
What is important for panoramic proper positioning?
Patient positioning and head alignment
What do patients need to remove for a panoramic radiograph?
Dental appliances
Earrings
Necklaces
Hairpins
Glasses
What is wrong with this image?
glasses
What is wrong with this image?
earrings
What is wrong with this image?
necklace
What is wrong with this image?
hairpins
What is wrong with this image?
removable prosthodontic device
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
What is wrong with this image?
Too far forward
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)
What is wrong with this image?
too far forward
What is wrong with this image?
too far back
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.
What is wrong with this image?
too far back
What is wrong with this image?
Inferior turbinates and meati spread across maxillary sinuses (too far back)
(also ghost image of earrings?-haley)
What is wrong with this image?
chin down
What happens if a panoramic is taken with the chin down?
- 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.
What is wrong with this image?
chin down
What is wrong with this image?
chin down and too far forward
What is wrong with this image?
chin up
What happens if a panoramic is taken with the chin up?
- 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.
What is wrong with this image?
chin up
What is wrong with this image?
head turned
What happens if a panoramic is taken with the head turned?
- 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?
head turned
Due to a left side shift, posterior teeth on left side will be closer to the sensor and project _________ on the radiographic image
narrower
Due to a left side shift, posterior teeth on right side will be farther from the sensor and project __________
wider
What is wrong with this image?
patient slumped
What is wrong with this image?
patient slumped
What is wrong with this image?
TONGUE NOT AT ROOF OF MOUTH
- palatoglossal air space
What is wrong with this image?
lead apron artifact
What is wrong with this image?
Ghost image of cervical spine and lead apron artifact.
What is wrong with this image?
partial panoramic image
What is wrong with this image?
patient movement
