EXAM Flashcards
is it true or false that xray photons have electrical charge
false
what is the correct ring holder to use when taking a paralleling periapical radiograph of tooth 11
blue
is it true or false that the xray beam is aimed upwards at approx 8 degrees
true
when positioning a patient for a panoramic radiograph which anatomical reference should be horizontal?
Frankfort plane
it should be standard practice for the patient to wear a lead apron for which intramural dental radiograph?
none of them
list 2 specific anatomical features that can hinder the positioning of the image receptor holder when attempting to take a paralleling periapical radiograph of a first molar tooth in an adult?
strong tongue
lack of adjacent teeth
shallow or high hard palate
lack of opposing molar teeth
tight cheeks unable to hold receptor
intra oral dental xray units, with an operating potential of 60-70kv, must include a spacer cone to ensure a minimum “focus to skin distance”. state the minimum distance and explain why the UK guidance depends it?
focus to skin distance 200mm
ensures xray beam is near parallel as more parallel beam means you have less distortion of the anatomy, maintains high quality and can be replicated
what does the Compton effect cause?
scatter which results in a lower quality image very little diagnostic information.
which end of the spectrum has photons which are not useful for image formation?
what material is used to filler these out of the xray beam?
low end of spectrum
aluminium
who can be the referee for radiographs?
qualified dental professionals
operators
practitioners
what are ghost shadow son a radiograph?
earrings
facial peircings
salivary stones
tonsil stones
dental restorations
dentures
what radiographs would you use for a patient with a BPE of 4 in all sextants?
Full mouth of periapicals
