Seven viruses that can be present in oral secretions include:
cold and flu viruses and bacteria
CMV
HBV
HCV
herpes simplex viruses
HIV
mycobacterium tuberculosis
The absence of pathogens, or disease causing microorganisms. This term is often used to describe procedures that prevent infection
aspesis
instruments used to penetrate soft tissue or bone, such as forceps, scalpels, bone chisels, scalers, and surgical burs are what type of instruments?
critical
Instruments that contact but do not penetrate soft tissue or bone such as x-ray film holding devices, mirrors, amalgam condensers, and burs, are what type of instruments?
semicritical
instruments or devices that do not come in contact with the mucous membranes, PID, exposure button, x-ray control panel, and lead apron
non critical
What type of disinfectant is used to clean and wipe down the dental unit once you are finished?
intermediate - level disinfectant
true or false. You must cover and clean all x-ray surfaces including x-ray machine, dental chair, work area, and lead apron, once finished with a pt
true
What is the proper way to clean film holding devices?
package and sterilized
describe the proper infection control procedure used for processing
carry cup with films to dark room with ungloved hands
place cup and paper towel down, turn off light, and place gloves
unwrap package fall on to the paper towel without touching them with gloves
once all films are unwrapped, take off gloves and throw garbage away
with ungloved hands, run the films
The imaginary bisector bisects what two angles?
the angle formed by the film and the long axis of the tooth
What is the primary benefit of using film holders in the bisecting technique?
it reduces radiation exposure to the pt, because they don't have to stabilize the film
The patients ________ __________ is used to hold the maxillary right molar film
left thumb
What is the proper vertical angulation for bitewing films?
+10
What causes foreshortening?
too much vertical angulation
What are three main disadvantages of using the bisecting technique?
image distortion
angulation problems (no film holder and aiming ring)
unnecessary exposure if pt used finger to stabilize film
Where should the front edge of the film be aligned for a:
premolar bitewing
molar bitewing
center of mandibular canine
center of mandibular 2nd premolar
What is the proper exposure sequence for taking radiographs?
anterior PA films to
posterior PA films (premolar then molar)
bitewing films (premolar than molar)
When are the use of each size of film indicated for bitewings?
size 0
size 1
size 2
children with primary dentition
Children with mixed dentition
adults
When is the use of vertical bitewings indicated?
follow up films for pts wiht bone loss due to periodontal disease
used to examine the level of alveolar bone in the mouth
When can you best evaluate interproximal root caries?
