Dental Radiology Midterm with all correct
answers
A radiograph is defined as - ---✔✔✔ANSWER----A picture on film
produced by the passage of x-rays through an object or body
Which of the following statements is true regarding the importance of dental
radiographs? - ---✔✔✔ANSWER----Many dental diseases are typically
discovered only thought the use of dental radiographs
The x-ray was discovered by: - ---✔✔✔ANSWER----William Roentgen
_____________ is an example of a patient protection technique used before x-ray
exposures - ---✔✔✔ANSWER----A thyroid collar
,Inherent filtration in the dental x-ray tubehead: - ---✔✔✔ANSWER----
Includes filtration that takes place when the primary beam passes through the
glass window of the x-ray tube, the insulating oil, and the tubehead seal
State and federal laws require that dental x-ray machines operating above 70 kVp
have a minimum total (inherent plus added filtration) of _______ mm of
aluminum filtration - ---✔✔✔ANSWER----2.5
The colllimator: - ---✔✔✔ANSWER----Restricts the size and shape of the x-
ray beam
A circular collimator produces a cone-shaped beam that is _____ inches in
diameter - ---✔✔✔ANSWER----2.75
A rectangular collimator - ---✔✔✔ANSWER----Resticts the beam more
than a circular collimator and significantly reduces patient exposure
Which of the following shapes of collimator are most effective in reducing patient
exposure - ---✔✔✔ANSWER----Rectangular
Which type of PID would be more effective in reducing patient exposure? - ---
✔✔✔ANSWER----16-inch rectangular PID
,An oral examination limits the practitioner to knowledge of what is seen clinically.
Dental radiographs allow the practitioner to see many conditions that are not
apparent clinically - ---✔✔✔ANSWER----Both statements are true
When radiographs are properly prescribed, exposed and processed, the benefit of
disease detection ____ the risk of small doses of x-radiation - ---
✔✔✔ANSWER----is considered equal
A ____ may be a dental radiographer - ---✔✔✔ANSWER----Dental
hygienist, assistant, dentist
To avoid occupational exposure to x-radiation, the dental radiographer must
always: - ---✔✔✔ANSWER----avoid the primary beam
The _____ allows for positioning of the tubehead - ---✔✔✔ANSWER----
extension arm
The ____ activates the machine to produce x-rays - ---✔✔✔ANSWER----
Exposure button
Which of the following statements is true of the film holder? - ---
✔✔✔ANSWER----It is required when using the intraoral paralleling
technique
, A ____ eliminates the need for the patient to stabilize the film - ---
✔✔✔ANSWER----film holder
Which of the following statements is true regarding dental x-ray film and
formation of the latent image? - ---✔✔✔ANSWER----The film placed to
the lingual of the teeth
Which component of x-ray film provides a stable support for the emulsion - ---
✔✔✔ANSWER----Film base
The film base is a flexible piece of - ---✔✔✔ANSWER----Polyester plastic
The adhesive later is added to the ____ before the ____is applied - ---
✔✔✔ANSWER----Film base; emulsion
The film emulsion is: - ---✔✔✔ANSWER----Attached to both sides of the
film
The film emulsion is composed of a homogeneous mixture - ---
✔✔✔ANSWER----Gelatin and barium salt crystals
answers
A radiograph is defined as - ---✔✔✔ANSWER----A picture on film
produced by the passage of x-rays through an object or body
Which of the following statements is true regarding the importance of dental
radiographs? - ---✔✔✔ANSWER----Many dental diseases are typically
discovered only thought the use of dental radiographs
The x-ray was discovered by: - ---✔✔✔ANSWER----William Roentgen
_____________ is an example of a patient protection technique used before x-ray
exposures - ---✔✔✔ANSWER----A thyroid collar
,Inherent filtration in the dental x-ray tubehead: - ---✔✔✔ANSWER----
Includes filtration that takes place when the primary beam passes through the
glass window of the x-ray tube, the insulating oil, and the tubehead seal
State and federal laws require that dental x-ray machines operating above 70 kVp
have a minimum total (inherent plus added filtration) of _______ mm of
aluminum filtration - ---✔✔✔ANSWER----2.5
The colllimator: - ---✔✔✔ANSWER----Restricts the size and shape of the x-
ray beam
A circular collimator produces a cone-shaped beam that is _____ inches in
diameter - ---✔✔✔ANSWER----2.75
A rectangular collimator - ---✔✔✔ANSWER----Resticts the beam more
than a circular collimator and significantly reduces patient exposure
Which of the following shapes of collimator are most effective in reducing patient
exposure - ---✔✔✔ANSWER----Rectangular
Which type of PID would be more effective in reducing patient exposure? - ---
✔✔✔ANSWER----16-inch rectangular PID
,An oral examination limits the practitioner to knowledge of what is seen clinically.
Dental radiographs allow the practitioner to see many conditions that are not
apparent clinically - ---✔✔✔ANSWER----Both statements are true
When radiographs are properly prescribed, exposed and processed, the benefit of
disease detection ____ the risk of small doses of x-radiation - ---
✔✔✔ANSWER----is considered equal
A ____ may be a dental radiographer - ---✔✔✔ANSWER----Dental
hygienist, assistant, dentist
To avoid occupational exposure to x-radiation, the dental radiographer must
always: - ---✔✔✔ANSWER----avoid the primary beam
The _____ allows for positioning of the tubehead - ---✔✔✔ANSWER----
extension arm
The ____ activates the machine to produce x-rays - ---✔✔✔ANSWER----
Exposure button
Which of the following statements is true of the film holder? - ---
✔✔✔ANSWER----It is required when using the intraoral paralleling
technique
, A ____ eliminates the need for the patient to stabilize the film - ---
✔✔✔ANSWER----film holder
Which of the following statements is true regarding dental x-ray film and
formation of the latent image? - ---✔✔✔ANSWER----The film placed to
the lingual of the teeth
Which component of x-ray film provides a stable support for the emulsion - ---
✔✔✔ANSWER----Film base
The film base is a flexible piece of - ---✔✔✔ANSWER----Polyester plastic
The adhesive later is added to the ____ before the ____is applied - ---
✔✔✔ANSWER----Film base; emulsion
The film emulsion is: - ---✔✔✔ANSWER----Attached to both sides of the
film
The film emulsion is composed of a homogeneous mixture - ---
✔✔✔ANSWER----Gelatin and barium salt crystals
