Radiographic interpretation and caries in radiographs Flashcards
What order do you look at quadrants of the mouth in radiographs
top right, top left, bottom left, bottom left (how we’re taught to chart)
how can you roughly estimate a childs age from early mixed dentition
look at molar teeth. Age 6,12 and 18 are when they erupt
how long after eruption does it take for roots to form
3 years
What is an extra tooth in between central incisors called
mesiodent (type of supernumery)
Which teeth are most likely to be congenitally absent
The last of each of the different ‘types’ of teeth i.e. lateral incisor, 2nd premolar and 3rd molar
What is a clinical evaluation report
Written report, legal requirement. Must be recorded after each exposure by the dentist. Put in written notes
in terms of caries diagnosis where does radiography fit
gold standard
what are the best types of radiograph to see caries
bitewings
what does a cyst look like on a radiograph
circular radioleucency,
well defined margin
what is cervical burnout
phenomenon caused by relative lower X-ray absorption on the mesial or distal aspect of the teeth, between the edge of the enamel and the adjacent crest of the alveolar ridge. Because of the relative diminished X-ray absorption, these areas appear relatively radiolucent with ill-defined margins.
what type of caries can cervical burnout look like
root surface caries
how can we differentiate cervical burnout from root surface caries
should be able to detect root surface caries clinically
what is the selection criteria for radiography
- do perio and visual exam first
If pocket depths = 4-6mm, horizontal bitewings
If pocket depths >6mm, vertical bitewings
If no bone shown because of bone loss, periapicals
Irregular - supplement with periapicals
need to see all teeth - panoramic
what angle should the beam be for taking a radiograph
90 degrees to line of arch avoid overlaps of adjacent teeth
