EX2; Intra-oral Radiographic Techniques, Infection Control, and Quality Analysis Flashcards
True or False
The basic technique principles apply for both film and digital intraoral radiographs
True
What are the three categories of intraoral radiographs
periapical
bitewing
occlusal
How many radiographs and of what kinds does a full mouth series (FMS/FMX) consist of
14-17 periapical
4 bitewings
What is that 4 criteria for quality images
adequate diagnostic quality
completely covers area of interest
least amount of magnification and distortion
optimal density and contrast
When would you retake a radiograph
only if the required information is not of diagnostic quality
What are the two different projection techniques
paralleling
bisecting angle
What is the most common projection technique
paralleling; less distortion
What is the basis of paralleling technique
the image receptor is parallel to the long axis of the tooth
Where is the central ray directed using paralleling technique
at a right angle to image receptor and teeth
The X-ray source should be what from the teeth
distant
This reduces magnification using the paralleling technique
long source to object distance
What device is used to aid the paralleling technique
Rinn positioning device
If not using a Rinn, what distance should the end of the cone be in relation to the patients skin
within two centimeters of the patients skin
Positioning of the tube head downwards will result in what
positive vertical angulation
Positioning of the tube head upwards will result in what
negative vertical angulation
Incorrect horizontal angulation of beam will result in what
overlapping of inter proximal surfaces of the crowns
What concept is the bisecting angle technique based upon
Cieszynski’s rule of isometry
What is Cieszynski’s rule of isometry
two triangles are equal if they share one complete side and have equal angles
How is the image receptor placed using bisecting angle technique
it is placed as close as possible to the lingual surfaces of the teeth and palate or lingual surface of the mandible
Using the bisecting angle technique, the film and the long axis of teeth form what
an angle at point where the teeth meet the image receptor
An imaginary bisector bisects what
the angle where the teeth meet the image receptor
The central ray of the X-ray beam is directed at what
a right angle to the imaginary bisector
True or False
Performing a radiographic exam is a non-invasive procedure
True
What is the barrier protocol for performing a radiographic exam
plastic bags are used for covering chair headrest, x-ray tube head, and exposure switch
What color Rinn, film size, and position is used when taking radiographs of maxillary and mandibular anterior teeth
blue Rinn
size 1 film
vertical position
What color Rinn, film size, position is used when taking radiographs of maxillary and mandibular posterior teeth
yellow Rinn
size 2 film
horizontal position
What is radiograph is the most common retake
premolar bitewing
What is included in a bitewing radiograph
crowns
alveolar crests
both mandibular and maxillary
What three things are batwings useful in detecting
interproximal caries
marginal periodontal bone loss
interproximal calculus
What color Rinn, film size, and position is used when taking bitewings
red Rinn
size 2
horizontal position
What are some special circumstances involving radiographs
gag reflex infection/trauma mentally/physically disabled pregnancy edentulous patients
What is the buccal object rule
When determining what is buccal, the object that seems to move opposite of the PID is buccal after two radiographs with changed horizontal angulation
What is the “summary” of the buccal object rule
the object that moves in “same” direction is “lingual”
the object that moves in “opposite” direction is “buccal”
