Das 135: Intraoral And Extraoral Imaging(Chpt.39,40,41,42)

114 Questions | By Maurita | Updated: Mar 21, 2022 | Attempts: 706

Questions

Settings

Feedback

During the Quiz End of Quiz

Play as

Quiz Flashcard

Create your own Quiz

Study guide.

Questions and Answers

1.

Number 2 film is commonly used for adult bitewing radiographs.
- A.
  
  True
- B.
  
  False
2.

Bitewing radiographs are used to show interproximal caries, early periodontal disease, and recurrent decay under restorations.
- A.
  
  True
- B.
  
  False
3.

The bisecting technique is preferred because it provides a more accurate image of the teeth.
- A.
  
  True
- B.
  
  False
4.

A periapical radiograph pictures the entire tooth and surrounding areas.
- A.
  
  True
- B.
  
  False
5.

Occlusal radiographs are used to locate retained roots, supernumerary teeth, salivary stones, and fractures.
- A.
  
  True
- B.
  
  False
6.

It is acceptable for the dental assistant to hold a film in the patient's mouth if they are unable to do so.
- A.
  
  True
- B.
  
  False
7.

Radiographs on edentulous patients are not necessary.
- A.
  
  True
- B.
  
  False
8.

A panoramic radiograph will allow the dentist to view the entire dentition and related structures on one film.
- A.
  
  True
- B.
  
  False
9.

A panoramic radiograph does not need any specialized equipment.
- A.
  
  True
- B.
  
  False
10.

A patient must remove earrings and eye glasses prior to having a panoramic radiograph taken.
- A.
  
  True
- B.
  
  False
11.

If the patient is in a wheelchair, doesn’t have use of his or her upper limbs, and a film sensor holder cannot be used to stabilize the film sensor, you should do which of the following?
- A.
  
  You may ask the patient's caregiver to assist in holding the film sensor.
- B.
  
  Hold the film sensor in the patient's mouth while you press the exposure button.
- C.
  
  Hold the film sensor in the patient's mouth and ask the caregiver to press the exposure button.
- D.
  
  Turn the wheelchair on its side until gravity holds the film sensor in the proper position.
12.

According to the guidelines for film placement, which of the following is true?
- A.
  
  The colored side of the film always faces the teeth.
- B.
  
  Anterior films are always placed horizontally.
- C.
  
  Posterior periapical films are always placed vertically.
- D.
  
  The identification dot on the film is always placed in the slot of the film holder.
13.

The alignment of the x-ray beam in the horizontal and vertical planes formed by the long axis of the teeth and the film sensor placement is referred to as:
- A.
  
  Angulation.
- B.
  
  Interproximal.
- C.
  
  Paralleling.
- D.
  
  Perpendicular.
14.

The bisecting-angle instrument (BAI) uses _____ to determine the correct PID angulation.
- A.
  
  Indicator arms
- B.
  
  Bite-blocks
- C.
  
  Aiming rings
- D.
  
  Dental dams
15.

When using an x-ray sensor, it is important to always:
- A.
  
  Place a cotton roll between the sensor and the teeth being x-rayed to protect the sensor.
- B.
  
  Use the bisecting technique.
- C.
  
  Place the sensor parallel to the incisal or occlusal edge of the teeth.
- D.
  
  Make sure the sensor is against the teeth being radiographed.
16.

In adults, a size #_____ intraoral film is used for the occlusal technique.
- A.
  
  0
- B.
  
  1
- C.
  
  2
- D.
  
  4
17.

Horizontal angulation is:
- A.
  
  The side-to-side angulation.
- B.
  
  Different when using the paralleling and bisecting techniques.
- C.
  
  Correct when the central ray is parallel to the curvature of the arch.
- D.
  
  Determined by the Stabe bite-block.
18.

Incorrect horizontal angulation of the PID results in:
- A.
  
  Elongation.
- B.
  
  Foreshortening.
- C.
  
  Blurred images.
- D.
  
  Overlapped contact areas.
19.

The American Academy of Oral and Maxillofacial Radiology recommends using the paralleling technique because:
- A.
  
  It is an easier technique to use.
- B.
  
  It provides the most accurate image with the least among of radiation exposure.
- C.
  
  The film sensor is placed closer to the teeth therefore reducing the chance of patient gagging.
- D.
  
  Both a and c.
20.

The exposure sequence for the posterior teeth should begin with the _____ view.
- A.
  
  Maxillary right premolar
- B.
  
  Maxillary right molar
- C.
  
  Mandibular right premolar
- D.
  
  Mandibular right molar
21.

The number of bitewing films needed is based on the curvature of the arch and the:
- A.
  
  Age of the patient.
- B.
  
  Size of the patient's mouth.
- C.
  
  Number of teeth present in the posterior areas.
- D.
  
  Number of periapical x-rays taken.
22.

The _____ technique is recommended by the American Academy of Oral and Maxillofacial Radiology and the American Association of Dental Schools, because it provides the most accurate image with the least amount of radiation exposure to the patient.
- A.
  
  Bisecting-angle
- B.
  
  Paralleling
- C.
  
  Bitewing survey
- D.
  
  Short-cone
23.

Angulation of the PID is critical to ensure that the central ray is perpendicular to the bisector line in which of the following techniques?
- A.
  
  Long-cone
- B.
  
  Bisecting
- C.
  
  Bitewing
- D.
  
  Both b and c
24.

When using a #2 film sensor for anterior views using the paralleling technique, there are _____ anterior images.
- A.
  
  Four
- B.
  
  Six
- C.
  
  Seven
- D.
  
  Eight
25.

When taking periapical x-rays, the patient's head is _____ for maxillary films and _____ for the mandibular arch.
- A.
  
  Tilted back slightly; tilted back slightly
- B.
  
  Tilted back slightly; upright
- C.
  
  Upright; tilted back slightly
- D.
  
  Upright; upright