Random Flashcards
Tissues that are dense (enamel and bone) will absorb lots of X-rays and appear white
Radiopaque
Tissues that are thin (oral soft tissues) will allow most xrays to pass through and will appear dark
Radiolucent
What do chronic alveolar abscesses show up as
Dark circular area at apex
What does periodontal disease show up as
Loss of lamina dura forming the crest of alveolar bone, loss of height and widening of periodontal ligament space
What do caries show up as
A dark area
Paralleling technique
An X-ray beam aiming device which consists of a bite block film holder which enables the film to be held parallel to the teeth
Bisecting angle technique
Direct the tube at a right angle to an imaginary line bisecting the long axis of the tooth and film
Where should the pimple of the X-ray be facing
The X-ray tube
The layers within a film packet in order from the machine tube are
Paper
Film
Paper
Lead foil
The chemical used in an intensifying screen can be what
Calcium tungstate
How can staff X-ray exposure be checked
Dosimeter
What do amalgam fillings appear as
White
What do composite fillings appear as
Grey
Staff must wear a dosimeter if they are exposed to what
150 intra oral or 50 DPT films a week
‘Development is random and can occur when exposed to any dose of radiation’ refers to what
Stochastic effects
