DA Final
What item of the x-ray unit restricts the radiation beam to 2.75'' at the end of the cone?
A collimator
Which of the following describes the use of a filter in a dental tube head?
A filter removes low energy x-rays
Weak radiation leaving the tube during exposure is prevented by use of a/an
Aluminum filter
Immediate reaction of the immune system to attack the foreign agent just administrated to the body is called
Anaphylactic shock
Nitroglycerin is administrated to a patient with
Angina Pretoris
Interproximal, or cavity detecting radiographs are
BWX's
Which of the following is the true of radiation monitoring badges?
Badges should be worn at waist level when exposing x-ray receptors
The following films are used to examine the crowns of both maxillary and mandibular teeth on one film
Bite wing
What method uses a computer sensor replaced in the mouth and provides instant image on the screen
Direct digital imaging
Which of the following are considered radiation protection for the operator during patient exposure:
Distance of 6-8 feet from primary beam
Where should the dot be placed one taking a bite me
Dot placement does not matter
What is the key to preventing future lawsuits for treatment provided an emergency situation
Efficient and complete record keeping
What is the negatively charged particle that is responsible for producing dental radiographs?
Electron
An incorrect vertical angle of the PID causes
Elongation
Which of the following describes the primary use of the bitewing radiograph
Examination of the interproximal areas of the team
All of the following would be considered an advantage for direct digital imaging except
Expensive to initiate
Any leaks of white light into the dark room will cause
Film fogging
The amount of radiation exposure an individual receives varies on
Film speed
the speed of electrons through a circuit is referred to as
Kilovoltage
The head position on a panoramic unit consists of
Lateral head supports, bite block, chin rest
What type of radiation can be controlled and eliminated
Leakage radiation
The instrument from the XCP kit that allows the operator to align the PID (Cone) at a right angle to the film and long axis of the tooth is the
Metal indicator rod
The amount of electrons needed to produce a diagnostic film is referred to as
Milliamperes
The cathode is the
Negative terminal
What causes a cone cut
Not aligning the center of the cone to the center of the film
Which of the following is an intra oral fim
Occlusal
Which of the following is not an extra oral film
Occlusal
How often should the processing tank be cleaned?
Once per week
An incorrect horizontal angle of the PID causes
Overlapping
Which type of x-ray shows the upper and lower arch is in one continuous film
Panoramic
All of the following may be photographs taken except
Panoramic view
Purpose of the lead foil in the backside of a film packet is to
Prevent secondary radiation from fogging film
The beam of radiation which is responsible for exposing the X-ray film is the
Primary/Direct Radiation
The value of radiographs for patient education could include
Results of missing teeth, implants/bridges from restoring mouth, orthodontics conditions
Which of the following definitions is incorrect
Right angle: formed by two parallel lines
What method would be used by an office when they are converting from conventional to digital
Scanning
Radiopaque means
Shows white on a film
The following substance found in the emulsion of a film is responsible for an x-ray image
Silver halide (nitrate) crystals
Which of the following film sizes is known as the standard film
Size 2
The purpose of the fixer is to
Stop action of the developer
And AED should be used for treatment of
Sudden cardiac arrest
What is the most common in least life-threatening emergency in the dental office
Syncope
Intro oral camera has been one of the best tools in the dental office for
Temperature acceptance, insurance billing, patient education
An ion is
That has lost and electron
The identification on the intra oral film is significant because
The dot indicates the pt right or left, the dot determines film orientation, the dot is important in film mounting
A periapical x-ray shows
The entire tooth and surrounding tissues
Insulin is
The hormone responsible for observing sugar into the cells for energy
When mounting an upper bicuspid film, a good anatomical landmark to look for would be
The maxillary sinuses
Foreshortening of an image occurs when the PID is at
Too high a vertical angle
Spirits of ammonia is used to
Treat syncope (fainting)
Which type of holder is used for the paralleling technique?
XCP kit
Density means
Difference between black, white and shades of gray
What is the occupational dose limits for radiation exposure in a calendar quarter (13 weeks) for the whole body
1.25 rems
A full mouth x-ray survey on an edentulous patient consists of
14 PA's
A full mouth x-ray survey includes:
18 films (14 PA's and 4 BWX)
The minimum allowable distance of the darkroom safety light from the working countertop is
4 feet
How does the temperature of the processing solutions affect the x-ray film
Cause the films to develop slower and faster
The material responsible for giving suppo t and stiffness to the x-ray film is called
Cellulose acetate
When taking x-rays on someone who is missing teeth what can we use to support the x-ray film holders
Cotton rolls
Use of faster speed x-ray film would help to protect the patient from exposure by allowing the operator to ___________ the exposure time
Decrease
Distortion means
Degree of darkness on a film
The degree of thickness of an object which affects the overall degree of darkening of an exposed film is referred to as
Density
Future generations are termed
Genetic effects
Reticulation on a film is a processing error caused by excessive
Heat
Tightness in the chest, feeling of suffocation and fast breathing are symptoms of
Hyperventilation
Which medical emergency can be treated with glucose gel
Hypoglycemia
Process films that turn brown and this color every three days for the results of
Improper washing
What would be considered a disadvantage to using digital x-rays
Infection control
Hyperventilation may be treated by
Instructed the patient to breathe into cupped hands or brown paper bag
Reasons for taking x-rays on an edentulous patient include which of the following
Insurance verification, check bone level, to ensure all teeth and roots have been removed
Dental receptors placed inside the mouth are termed
Intraoral
Radiation is considered harmful because it
Is cumulative
Besides gamma rays, what additional radiation wave from the EMR spectrum is considered harmful to tissue due to its wavelength?
Ultra violet
Radiation protection for the patient would include
Use of lead apron
The part of the X-ray machine that produces the radiation is
Vacuum tube
What part of the intro oral camera is placed in the patient's mouth
Wand
After removing an exposed film from the patients mouth the first thing you should do is
Wipe off the saliva from the film