WorksheetsChapter 41 & 42 Intraoral & Extraoral Imaging
Total questions: 31
Worksheet time: 16mins
Dr. Medina asks you to take an x-ray of tooth #12 where would you be placing the film to take the x-ray?
Upper ( Maxillary ) right
Upper ( Maxillary) left
Lower ( Mandibular) right
Lower ( Mandibular) left
Incorrect ______angulation will result in closed contacts on the radiograph.
Horizontal
Vertical
A bitewing radiographic survey can include:
A. two films
B. four films
C. six films
Both A and B are correct
The most appropriate technique to use when exposing dental x-ray film on a patient with a shallow palate, a very short lingual frenum, or palatal tori is the
bisecting technique
paralleling technique
extraoral radiograph
The radiograph that shows images of the entire length of the tooth, including the apex, is the:
periapical
bitewing
occlusal
All of the above
The _______________ is an intraoral technique of exposing periapical images in which the teeth and the image receptor are parallel to each other.
central ray
paralleling technique
right angle
intersecting
Dental images with the proper landmarks, properly placed, exposed and processed radiographs have good _______________.
diagnostic quality
contact areas
density
sequence
What is located on the x-ray machine control panel?
collimator
milliamperage (mA) selector
tube head
filter
Where would you begin taking a full mouth examination(FMX) radiographs on a patient with a severe gag reflex?
Maxillary molar
Mandibular anterior
Maxillary anterior
Mandubular molar
Full mouth x-rays are taken how often?
1 - 2 years
3 - 5 years
5 - 7 years
Whenever you want
How often are bite-wing x-rays taken.
Every 6 months
Every 18 months
Every 2 years
Every 5 years
The premolar periapical film should include:
A. the distal half of the canine.
B. both premolars
C. the canine
Both A and B
The long axis of the tooth is an imaginary line, dividing the tooth in half horizontally
True
False
An edentulous patient will not require radiographs of any kind?
True
False
Extraoral radiographs are not used to diagnose:
TMJ disorders.
impacted teeth
dental caries
large areas of the jaws
When you are exposing images, in which area of the mouth should you begin?
Maxillary right
Mandibular anterior
Mandibular left
Maxillary anterior
Why is an exposure sequence important?
To follow guidelines
To keep up with them in the processing
So areas of the mouth are not missed or retaken
For proper mounting of film
Why is it not recommended to have the patient hold the image receptor during exposure?
It does not meet with infection control standards.
The dental assistant must position the film or sensor properly.
The patient’s finger will get in the way of the image.
The patient receives unnecessary radiation.
What is the purpose of bitewing images?
To view the interproximal surfaces
To view the gingival third of the teeth
To view the occlusal third of the teeth
To view the apices of the teeth
What film size is recommended for a pediatric patient with all primary dentition?
0
1
2
3
What film size is used in the occlusal technique for an adult?
1
2
3
4
When radiographs are mounted, where is the dot placed?
Facing down
It does not matter
Facing away from you
Facing up
What vertical angulation should be used for bitewing images?
+ 10 degrees
+ 15
- 10
-15
Why is it important to avoid retakes?
To avoid wasting film
The dentist will deduct it from your pay.
To avoid unnecessary radiation exposure
Insurance will not pay for retakes.
A focal trough is:
The area where a patient bites down
An imaginary horseshoe-shaped area used for panoramic radiographs
imaginary line that divides the patient's face into right and left side
What type of device is included on a panoramic unit?
Hemostat
Periapical film holder
Cephalostat
Bitewing holder
Which of the following is (are) a component of a panoramic unit?
A. Notched bite-block
B. Ear clip
C. Forehead rest
D. Chin rest
E. A, C and D are correct
Which of the following can cause “ghost images” on a panoramic image?
Eyeglasses
Earrings
Necklaces
All of the above
A critical component in obtaining a quality panoramic radiograph is:
qualified operator
proper film processing
patient positioning
All of the above
Common errors that can occur in panoramic dental radiography are:
Ghost images
lead apron artifact
chin positioning
positioning of teeth and spine
All of the above.
What type of X-ray image is this called:
Bitewing
Cephalometric
Anterior
Panoramic
