DPT Flashcards
what does a dpt show
entire maxillomandibular region
how long does a dpt take
10-15 seconds
how does a dpt work
patient stands in the middle of machine
x ray behind patient, receptor in front
controlled rotation around head during exposure
what is the focal trough
structures in focal trough remain projected on same point of receptor (look sharp)
structures outside the focal trough continually projected onto different points on projector (appear blurred)
why are incisors often blurry on DPTs
focal trough is thinner due to speed of rotation here
where is there most likely to be distortion in a DPT
anteriorly where the focal trough is thinnest
what should the patient be advised of before dpt
remove metal foreign bodies from the head and neck
keep neck upright
tongue roof of the mouth
stand still
dont talk or swallow
what direction does x ray tube move in during a dpt
right to left
what happens if a pt does not put their tongue to the roof of there mouth
air shadow band
what are the advantages of a dpt
shows height mandible and ID canal
shows walls of maxillary sinus
dose is smaller than full mouth periapicals
what shadows can be found on a DPT
real shadows
ghost shadows
air shadows
why take a DPT
grossly neglected dentition
perio bone assessment
bony legion or unerupted tooth (if you cant see it on intra orals)
8s assessment
ortho assessment
why take a dpt for caries diagnosis
if a patient has a strong gag reflex
