Radiography Flashcards
What are latrogenic problems?
Overhanging restorations or root perforations by posts.
Define the term congenital?
A disease or physical abnormality presence from birth.
Define dental radiography
Diagnostic tool
How does periodontal disease show up on radiographs?
- Loss of lamina dura forming the crest of the alveolar bone.
- Loss is height of the alveolar bone.
- Widening of the periodontal ligament space.
How do cysts show on radiographs?
- Enlarged dark areas surrounding other structures.
- Seen pushing tooth roots out of their normal positions
Define radiopaque
- Absorbed or scattered
- More dense tissue
- Appear light grey to white
Define radiolucent
- Radiation pass through more
- Less dense tissue
- Appears dark grey to black
What is calcium hydroxyapatite?
Pure white in colour
Reason for a elongated image?
Collimator angulation is too shallow
Reason for foreshortening of image?
Collimator angulation is too steep
Reason for transparent film or faint image with overlying pattern?
Film places the wrong way around the collimator for exposure, with the lead foil pattern superimposed onto the film.
Reason for crazed pattern on film?
Film dried too quickly over a strong heat source.
Reason for black line across the film?
Film bent or folded during processing
Reason for brown or green stains?
Inadequate fixing due to old solution
Reason for scratches or fingerprints?
Catching the film on the tank side during immersion or not holding the film by the edges.
