Chapter 30 Flashcards
What is imperative when using handheld x-ray devices?
An image receptor positioner with an alignment guide must be used because the operator must take a position in front of the unit.
What is the correct answer regarding the statement about handheld x-ray devices?
C) The statement is correct, but the reason is not.
Which technique is recommended for exposing intraoral postmortem radiographs?
A) Paralleling technique.
What is necessary for film duplication?
D) All of the above.
What is the exception for needing duplicate radiographs?
C) Soft tissue assessment.
What is the correct order for producing duplicate films?
B) Remove original radiographs from mount and place on duplicator, remove duplicating film from the box and place emulsion-side down, close duplicator cover, set time, depress exposure button and process the film.
Which extraoral radiographic image examines fractures of the condylar neck?
B) Reverse towne.
Is it often difficult to use standard image receptor holders for radiographs during endodontic procedures?
TRUE
Does duplicating film have double-sided emulsion?
FALSE
Duplicating film has single-sided emulsion.
Do localization methods provide a way for the radiographer to read a third dimension into two-dimensional radiographs?
TRUE
Is a series of radiographs on the same tooth needed to evaluate various stages of endodontic treatment?
TRUE
Is the right-angle method of localization based on the shadow-casting principle?
FALSE
The definitive method of localization is based on the shadow-casting principles.
Does the definitive method of localization rely on the S.L.O.B. rule?
FALSE
The tube shift method of localization relies on the S.L.O.B. rule.
Can extraoral radiographs be substituted for intraoral radiographs?
FALSE
Although intraoral radiographs provide better resolution, extraoral radiographs may be substituted for patients who cannot or will not open their mouths.
Do orthodontists frequently use extraoral radiographs?
TRUE
Does a transcranial radiograph evaluate the maxillary, frontal, and ethmoid sinuses?
FALSE
A Waters radiograph evaluates the maxillary, frontal, and ethmoid sinuses.
Is a cephalometric radiograph used to evaluate the position and orientation of the condyles?
FALSE
A submentovertex radiograph is used to evaluate the position and orientation of the condyles.
Does a cephalometric radiograph image the entire skull from the side?
TRUE
Is it required to record at least 8 to 10 mm below the root apex in endodontic therapy?
FALSE
Endodontic therapy requires at least 4 to 5 mm below the root apex be recorded.
Can the tube shift method of localization assist with separating superimposed root canals?
TRUE
Can handheld x-ray devices be used when wall-mounted dental x-ray machines are not accessible?
TRUE
Should techniques be the same for wall-mounted units when using handheld x-ray devices?
FALSE
Radiographers should be prepared to appropriately adapt or alter techniques used with a wall-mounted dental x-ray machine.
Can film-based radiographs be digitized?
TRUE
Can utility wax or clay be used to attach a biteblock for forensic identification?
TRUE
Can a radiographic examination of teeth provide a means of antemortem identification?
FALSE
A radiographic examination of teeth can provide a means of postmortem identification.
May the bisecting technique need to be used in forensic identification?
TRUE
Do some extraoral imaging techniques require special equipment?
TRUE
Can radiographs be exposed during endodontic therapy?
Yes.
What are three methods of localization?
The definitive evaluation method, the right-angle method, and the tube shift method.
What is the principle behind the tube shift method of localization?
If the structure appears to have moved in the same direction as the tube shift, the object is on the lingual.
What is a duplicate radiograph?
An identical copy of an original radiograph.
What is the purpose of the lateral jaw radiograph?
To examine the posterior regions of the mandible.
What is a lateral cephalometric radiograph?
A lateral skull projection made with the patient’s head stabilized in a cephalostat.
What is the purpose of a Waters projection?
Images the maxillary, frontal, and ethmoid sinuses.
Why must a radiographer take a position behind handheld x-ray devices?
To prevent backscatter radiation exposure.
What is the term for images available before death for identification?
Antemortem radiographs.
How to produce darker duplicate images?
Decrease the exposure time.
