radiology Flashcards
teeth are wide and short
too far back
teeth are thin and long
too far forward
straight smile
chin up
exaggerated smile
chin down
how often take BWS
6-12 months normal pt
6-18 months adult, partially endentulous
lingual mounting
raised dot is AWAY from the viewer
viewer look at from behind pt
labial mounting
raised dot is TOWARD the viewer
viewer look at in front pt
recommended by ADA
manual processing
developing, washing, fixing, washing and drying
developing 5 mins at 68F
- reducing agent: hydroquinone or elon : reduces exposed silver halide crystal into black metallic silver
- alkalizer: sodium carbonate : softens film emulsion and speeds up action
- restrainer: potassium bromide: inhibits development of unexposed silver halide crystals
- preservative: sodium sulfite : prevents oxidation
fixing 10 mins or 2x developing time
- fix agent: sodium thiosulfate: clears unexposed silver halide crystals
-hardener: potassium alum - shrinks and hardens emulsion - acidifier: acetic acid : keeps medium acidic and stops additional developemtn
-preservative: sodium sulfite - prevents oxidation
inverted Y
mostly found supreior to the max canine apex
zygomatic process
radiopaque
nutrient canals
radiolucent
mandibular canal
thick, radiolucent
mental foramen
around premolars
lingual foramen
radiolucent
caries classification
class I : not at the DEJ
class II: at the DEJ
class III : over the DEJ
class IV : deep
clinician postion
behind the wall OR 6 FT AWAY from the source of the radiation, at a 90-135 degree angle
PAN
thyroid collar is NOT worn
only Lead apron
gag reflex
maxillary molars are most lily to provoke gag reflex
wave length
longer wavelength = low frequency = less energy
and vice versa
ampere
number of electrons per second
dental machine : 5-15 mA
volt
force that moves electrons
