ADAP Radiography 2 — Questions and Answers
Question 1: Which radiographic technique is most commonly used for children due to reduced patient discomfort?
- Paralleling technique
- Bisecting angle technique (Correct answer)
- Occlusal technique
- Panoramic technique
Correct answer: Bisecting angle technique
The bisecting angle technique is often preferred for pediatric patients because it requires less film placement depth and causes less gagging.
Question 2: What is the purpose of the lead apron used during dental radiography?
- To keep the patient warm during the procedure
- To protect the patient from scattered radiation to the torso and gonads (Correct answer)
- To reduce the amount of radiation emitted by the X-ray tube
- To improve image clarity by reducing patient movement
Correct answer: To protect the patient from scattered radiation to the torso and gonads
The lead apron shields the patient's thyroid, chest, and reproductive organs from scatter radiation during X-ray exposure.
Question 3: What does the term 'elongation' describe in dental radiography?
- An image that appears shorter than the actual tooth
- An image that appears longer than the actual tooth (Correct answer)
- Overlapping of adjacent tooth contacts
- Increased density of the radiographic image
Correct answer: An image that appears longer than the actual tooth
Elongation occurs when the vertical angulation of the X-ray beam is too shallow (less than correct), causing the image to appear stretched or longer than the actual tooth.
Question 4: Which type of dental radiograph provides the most comprehensive view of the entire dentition and surrounding structures in a single image?
- Periapical radiograph
- Bitewing radiograph
- Occlusal radiograph
- Panoramic radiograph (Correct answer)
Correct answer: Panoramic radiograph
A panoramic radiograph captures the entire maxilla, mandible, teeth, and surrounding structures in one extraoral image.
Question 5: What does kilovoltage peak (kVp) primarily control in dental radiography?
- The quantity of X-rays produced
- The penetrating power (quality) of the X-ray beam (Correct answer)
- The duration of the X-ray exposure
- The size of the focal spot on the anode
Correct answer: The penetrating power (quality) of the X-ray beam
kVp controls the energy and penetrating ability of the X-ray beam, affecting contrast and the ability to penetrate dense structures.
Question 6: A patient presents with an extremely sensitive gag reflex. Which receptor placement strategy is most appropriate for posterior periapical radiographs?
- Place the receptor as far anteriorly as possible
- Use a size 0 receptor and place it as far posterior as acceptable (Correct answer)
- Switch entirely to bitewing radiographs
- Use the film placement in the occlusal plane
Correct answer: Use a size 0 receptor and place it as far posterior as acceptable
A smaller receptor (size 0) minimizes bulk in the oral cavity and should be positioned to capture the required anatomy while minimizing palatal contact that triggers gagging.
Question 7: What radiographic landmark appears as a radiopaque band running horizontally across the roots of the maxillary molars?
- Incisive foramen
- Zygomatic process of the maxilla (Correct answer)
- Maxillary sinus floor
- Nasal fossa
Correct answer: Zygomatic process of the maxilla
The zygomatic process (malar process) of the maxilla appears as a dense, radiopaque U-shaped or band-like structure superimposed over the maxillary molar roots.
ADAP Radiography 2
Which radiographic technique is most commonly used for children due to reduced patient discomfort?