DAS 130 FINAL questions well answered
to pass graded A+
X-rays were discovered by: - correct answer ✔✔Wilhelm Roentgen
Which of the following was Otto Kalkhoff’s contribution to dental radiography? - correct answer
✔✔He made the first dental radiograph.
Which of the following was the most recent development in the history of dental x-ray
equipment? - correct answer ✔✔Introduction of a recessed long-beam tube head.
Current, fast film requires less than __% of the initial exposure times used for dental
radiography in 1920. - correct answer ✔✔2
The long-cone paralleling technique was introduced by ______________ in 1947. - correct
answer ✔✔F. Gordon Fitzgerald
Cassandra is a college sophomore visiting your dental office for an initial examination. Her
dental history reveals that her dental care has been infrequent throughout her childhood and
young adulthood, and no care in the past 18 months. Any previous dental radiographs would be
long outdated. When Cassandra is informed of the rationale and need for a current full-mouth
series, she states that she read on the Internet that dental x-rays are unnecessary and would
expose her to needless, dangerous radiation.
You explain to Cassandra that: - correct answer ✔✔radiographs enable the dental professional
to identify many conditions that may otherwise go undetected and to see conditions that
cannot be identified clinically.
,Which of the following is true regarding the component parts of an intraoral dental x-ray
machine? - correct answer ✔✔The position-indicating device (PID) extends from the tubehead
opening.
The exposure light turns ________ and the beep ______ when the x-ray exposure is completed.
- correct answer ✔✔off; stops
Beam alignment devices and collimating devices are used to indicate the position of the
_______ in relation to the tooth and the receptor? - correct answer ✔✔position-indicating
device (PID)
__________ is a device used to hold and align intraoral dental x-ray films in the mouth. - correct
answer ✔✔film holder
After exposing a few radiographic images, a few of the images appear light. You know that the
exposure times were set properly, and a quick check reveals the films have not been placed
backward and the processing chemistry are up to date. A possible solution could be: - correct
answer ✔✔make sure to hold the exposure button down until the end of the beeping sound.
Prior to ___________, no federal standards existed for the manufacturer of dental x-ray
machines. - correct answer ✔✔1974
The film emulsion is composed of a homogenous mixture of - correct answer ✔✔gelatin and
silver halide crystals
___________ is the main component of the silver halide crystals in dental x-ray film. - correct
answer ✔✔Bromide
The latent image is stored by the ______________ in dental x-ray film. - correct answer
✔✔silver halide crystals
,The invisible pattern of stored energy on the exposed film is called the - correct answer
✔✔latent image
When would you use a two-film packet when taking radiographs on your patient? - correct
answer ✔✔When a duplicate record of a radiographic examination is needed.
What is the purpose of the lead foil sheet found within the film packet? - correct answer ✔✔To
shield the film from secondary backscattered radiation
When you are placing the film packet in your patient's mouth, which side of the film packet
would you place toward the patient's teeth? - correct answer ✔✔The solid white side
Your dentist asks you to take radiographs on your patient in order to check the interproximal
surfaces of the posterior maxillary and mandibular teeth for decay. Which type of film would be
the best to take the radiograph? - correct answer ✔✔Bite-wing film
Your dentist asks you to take radiographs on your patient in order to check the apex (tip) of the
mandibular left posterior teeth. Which type of film would be the best to take the radiograph? -
correct answer ✔✔Periapical
The size #2 dental x-ray film may be used for which types of radiographs? - correct answer ✔✔-
Adult periapical
- Adult bitewing
- Occlusal for a 6 year old pediatric patient.
Which of the following film speed is the fastest film currently available? - correct answer ✔✔F-
speed film
, An intensifying screen is a smooth plastic sheet coated with minute fluorescent crystals known
as - correct answer ✔✔phosphors
Rare earth screens - correct answer ✔✔have phosphors that emit green light
Duplicating film - correct answer ✔✔is used to make an identical copy of an intraoral or
extraoral radiograph
Film is best stored in an area that is - correct answer ✔✔cool and dry
An oral examination limits the practitioner to knowledge of what is seen clinically. Dental
images allow the practitioner to see many conditions that are not apparent clinically - correct
answer ✔✔Both statements are true.
Through the use of dental images, the dental radiographer can detect ________ that cannot be
detected clinically. - correct answer ✔✔- diseases
- lesions
- lesions
When dental images are properly prescribed, exposed, and processed, the benefit of disease
detection ____________ the risk of small doses of x-radiation. - correct answer ✔✔far
outweighs
A ______________ may be a dental radiographer. - correct answer ✔✔- Dentist
- dental hygienist
-dental assistant
to pass graded A+
X-rays were discovered by: - correct answer ✔✔Wilhelm Roentgen
Which of the following was Otto Kalkhoff’s contribution to dental radiography? - correct answer
✔✔He made the first dental radiograph.
Which of the following was the most recent development in the history of dental x-ray
equipment? - correct answer ✔✔Introduction of a recessed long-beam tube head.
Current, fast film requires less than __% of the initial exposure times used for dental
radiography in 1920. - correct answer ✔✔2
The long-cone paralleling technique was introduced by ______________ in 1947. - correct
answer ✔✔F. Gordon Fitzgerald
Cassandra is a college sophomore visiting your dental office for an initial examination. Her
dental history reveals that her dental care has been infrequent throughout her childhood and
young adulthood, and no care in the past 18 months. Any previous dental radiographs would be
long outdated. When Cassandra is informed of the rationale and need for a current full-mouth
series, she states that she read on the Internet that dental x-rays are unnecessary and would
expose her to needless, dangerous radiation.
You explain to Cassandra that: - correct answer ✔✔radiographs enable the dental professional
to identify many conditions that may otherwise go undetected and to see conditions that
cannot be identified clinically.
,Which of the following is true regarding the component parts of an intraoral dental x-ray
machine? - correct answer ✔✔The position-indicating device (PID) extends from the tubehead
opening.
The exposure light turns ________ and the beep ______ when the x-ray exposure is completed.
- correct answer ✔✔off; stops
Beam alignment devices and collimating devices are used to indicate the position of the
_______ in relation to the tooth and the receptor? - correct answer ✔✔position-indicating
device (PID)
__________ is a device used to hold and align intraoral dental x-ray films in the mouth. - correct
answer ✔✔film holder
After exposing a few radiographic images, a few of the images appear light. You know that the
exposure times were set properly, and a quick check reveals the films have not been placed
backward and the processing chemistry are up to date. A possible solution could be: - correct
answer ✔✔make sure to hold the exposure button down until the end of the beeping sound.
Prior to ___________, no federal standards existed for the manufacturer of dental x-ray
machines. - correct answer ✔✔1974
The film emulsion is composed of a homogenous mixture of - correct answer ✔✔gelatin and
silver halide crystals
___________ is the main component of the silver halide crystals in dental x-ray film. - correct
answer ✔✔Bromide
The latent image is stored by the ______________ in dental x-ray film. - correct answer
✔✔silver halide crystals
,The invisible pattern of stored energy on the exposed film is called the - correct answer
✔✔latent image
When would you use a two-film packet when taking radiographs on your patient? - correct
answer ✔✔When a duplicate record of a radiographic examination is needed.
What is the purpose of the lead foil sheet found within the film packet? - correct answer ✔✔To
shield the film from secondary backscattered radiation
When you are placing the film packet in your patient's mouth, which side of the film packet
would you place toward the patient's teeth? - correct answer ✔✔The solid white side
Your dentist asks you to take radiographs on your patient in order to check the interproximal
surfaces of the posterior maxillary and mandibular teeth for decay. Which type of film would be
the best to take the radiograph? - correct answer ✔✔Bite-wing film
Your dentist asks you to take radiographs on your patient in order to check the apex (tip) of the
mandibular left posterior teeth. Which type of film would be the best to take the radiograph? -
correct answer ✔✔Periapical
The size #2 dental x-ray film may be used for which types of radiographs? - correct answer ✔✔-
Adult periapical
- Adult bitewing
- Occlusal for a 6 year old pediatric patient.
Which of the following film speed is the fastest film currently available? - correct answer ✔✔F-
speed film
, An intensifying screen is a smooth plastic sheet coated with minute fluorescent crystals known
as - correct answer ✔✔phosphors
Rare earth screens - correct answer ✔✔have phosphors that emit green light
Duplicating film - correct answer ✔✔is used to make an identical copy of an intraoral or
extraoral radiograph
Film is best stored in an area that is - correct answer ✔✔cool and dry
An oral examination limits the practitioner to knowledge of what is seen clinically. Dental
images allow the practitioner to see many conditions that are not apparent clinically - correct
answer ✔✔Both statements are true.
Through the use of dental images, the dental radiographer can detect ________ that cannot be
detected clinically. - correct answer ✔✔- diseases
- lesions
- lesions
When dental images are properly prescribed, exposed, and processed, the benefit of disease
detection ____________ the risk of small doses of x-radiation. - correct answer ✔✔far
outweighs
A ______________ may be a dental radiographer. - correct answer ✔✔- Dentist
- dental hygienist
-dental assistant
