Dental Dental Radiology 1 — Questions and Answers
Question 1: Which type of dental X-ray provides the most complete view of all teeth and surrounding bone in a single image?
- Periapical
- Bitewing
- Panoramic (Correct answer)
- Occlusal
Correct answer: Panoramic
A panoramic radiograph captures the entire dentition, jaws, TMJ, and surrounding structures in one image.
Question 2: What does the term 'radiolucent' mean when describing a finding on a dental X-ray?
- Appears white/bright on the image
- Appears dark/black on the image (Correct answer)
- Appears gray on the image
- Cannot be seen on the image
Correct answer: Appears dark/black on the image
Radiolucent structures allow X-rays to pass through easily, producing dark areas on the radiograph, such as caries or abscesses.
Question 3: Which film placement technique produces the least distortion in periapical radiographs?
- Bisecting angle technique
- Paralleling technique (Correct answer)
- Occlusal technique
- Oblique technique
Correct answer: Paralleling technique
The paralleling technique places the film parallel to the long axis of the tooth and directs the X-ray beam perpendicular to both, minimizing distortion.
Question 4: What type of interproximal radiograph is most commonly used to detect proximal caries and crestal bone loss?
- Periapical
- Panoramic
- Bitewing (Correct answer)
- Lateral cephalometric
Correct answer: Bitewing
Bitewing radiographs show the crowns and interproximal areas of both arches simultaneously, making them ideal for detecting proximal decay and early bone loss.
Question 5: Which radiation protection device should a patient always wear during dental X-rays to protect reproductive and other radiosensitive organs?
- Lead apron with thyroid collar (Correct answer)
- Safety glasses
- Nitrile gloves
- Face shield
Correct answer: Lead apron with thyroid collar
A lead apron with thyroid collar shields the patient's body and thyroid gland from scatter radiation during dental radiography.
Question 6: What is the ALARA principle in dental radiography?
- Always Limit All Radiation Amounts
- As Low As Reasonably Achievable (Correct answer)
- Avoid Lengthy And Repeated Assessments
- Align Laser And Radiation Apparatus
Correct answer: As Low As Reasonably Achievable
ALARA stands for 'As Low As Reasonably Achievable' and guides dental professionals to minimize radiation exposure while maintaining diagnostic quality.
Dental Dental Radiology 1
Which type of dental X-ray provides the most complete view of all teeth and surrounding bone in a single image?