Dental Radiography Exam 1
three components of xray machine correct answers tubehead, extension arm, and
control panel
four components of xray film correct answers film base, adhesive layer, film emulsion,
and protective layer
________ in film emulsion absorb the x-radiation during xray exposure and store the
energy from the radiation correct answers silver halide crystals
invisible pattern on emulsion correct answers latent image
three types of film used in dental radiography correct answers intraoral film, extraoral
film, duplicating film
intraoral film sizes correct answers 0,1,2,3,4--larger the number, larger the size
intraoral film speeds correct answers D, F......f speed film reduces patient exposure to
radiation by 60% compared with d speed
__________ transform xray energy into visible light, which in turn exposes the screen
film correct answers intensifying screens
special type of photographic film used to make an identical copy of an intraoral or
extraoral radiograph correct answers duplicating film
5 steps in film processing correct answers development, rinsing, fixation, washing, and
drying
chemical solution used in development process to reduce the exposed, energized silver
halide crystals correct answers developer
developer solution 4 basic ingredients correct answers developing agent, perservative,
accelerator, and restrainer
fixer solution 4 basic agents correct answers fixing agent, preservative, hardening
agent, and acidifier
disease transmission may occur as a result of correct answers direct contact with
pathogens in saliva, blood, respiratory secretions, lesions...indiret contact with
contaminated objects or instruments....direct contact with airborne contaminants present
in spatter or aerosols or oral and respiratory fluids
, 3 conditions for infection control to occur correct answers susceptible host, pathogen
with suffiencient infectivity and numbers to cause infection
minimum ppe's correct answers protective attire, care of hands
film is placed in mouth, parallel to long axis of tooth, central ray is directed
perpendicular to film and long axis of tooth correct answers paralleling technique
anterior teeth film size correct answers 1
posterior teeth size film correct answers 2
5 basic rules of paralleling technique correct answers film must cover prescribed area,
film positioned parallel to long axis of tooth, central ray directed perpendicular to film
and long axis of tooth, central ray directed through contact areas between teeth, and
xray beam centered over film to ensure all areas of film are being exposed
which teeth should you always start with in paralleling technique correct answers
anterior
advantages of paralleling technique correct answers produces images with dimensional
accuracy,simple and easy to learn and use, easy to standardize, and can be accurately
repeated
bisecting technique used to expose correct answers periapical films
in bisecting technique: correct answers film placed along lingual surface of tooth, where
film contacts tooth-plane of film and long axis of tooth form an angle, imaginary bisector
divides the angle in half or bisects it, and central ray of xray beam is directed
perpendicular to the imaginary bisector
film size used with bisecting correct answers 2--positioned vertically for anterior and
horizontally for posterior
incorrect horizontal angulation results in correct answers overlapping
correct vertical angulation has the tooth... correct answers the same size as the film
Forshortening correct answers excessive vertical angulation, tooth is shortened
elongation correct answers insufficient vertical angulation, tooth is longer
bite-wing includes correct answers crowns of maxillary and mandibular teeth,
interproximal areas, and areas of crestal bone on the same film
four sizes of film correct answers 0,1,2,3...size 2 recommended
