04 Intraoral rad and darkroom errors Flashcards
1
Q
what type of patient preparation errors often occur?
A
- forget to have patient take off glasses, or remove dental appliances
- movement of patient or tubehead during exposure=blurred image (motion artifact)
2
Q
technique errors
A
- not including distals of canines when required, apices cut off, not enough of bone included, etc
- backwards film=herringbone/tire track pattern superimposed on film from the lead foil
- dot articfact, “put the dot in the slot”, and it should be placed at the coronal/occlusal portion so the apex can be seen
- cone cut, bad setup and ring is superimposed, angulation errors,
3
Q
if the film is processed without having been exposed, what will the plastic film look like?
A
the plastic film will be clear with a blue tint
4
Q
if the film is exposed to room light before processing…
A
the image will be completely black
5
Q
if the automatic processors are dirty what will happen on the films?
A
radiolucent lines may appeaer
6
Q
if the fixer is not completely removed…
A
brown stains occur with age
7
Q
what causes the brown stains when rads age?
A
-retained hypo (thiosulfate) from the fixer reacting with the metallic silver image to form brown silver sulfide
