Radiography
cavity = tooth hole
impacted tooth = it occurs when a tooth fails to break through the gum line
prosthetic = an artificial body part; a prosthesis.
brace = a wire device fitted in the mouth to straighten the teeth
intraoral = inside the mouth
abnormality = not usual
exposure = a situation where you aren't protected from something dangerous or unpleasant
lead [lɛd] = a soft heavy grey metal, the chemical element of atomic number 82 (Pb)
