DRC Patient Management & Special Populations 1 — Questions and Answers
Question 1: A patient with a strong gag reflex is struggling with posterior periapical exposures. Which technique is MOST effective for reducing the gag reflex?
- Increasing kVp to allow faster exposure
- Placing the receptor as far posteriorly as possible to ensure coverage
- Applying salt to the tip of the patient's tongue before placement (Correct answer)
- Using a size 4 receptor to minimize repositioning
Correct answer: Applying salt to the tip of the patient's tongue before placement
Applying salt to the tip of the tongue stimulates acupressure points that suppress the gag reflex, improving patient tolerance for posterior receptor placement.
Question 2: When taking periapical radiographs on a 5-year-old child, which receptor size is MOST appropriate?
- Size 0 (pediatric) (Correct answer)
- Size 1
- Size 2
- Size 4
Correct answer: Size 0 (pediatric)
Size 0 receptors are the pediatric size and are designed to fit comfortably in the small oral cavity of young children without causing excessive discomfort.
Question 3: A patient who is pregnant presents for her routine hygiene appointment requiring radiographs. Which statement BEST reflects current guidelines?
- All radiographs must be postponed until after delivery
- Radiographs may be taken when clinically necessary using a lead apron and thyroid collar (Correct answer)
- Only bitewing radiographs are permitted during pregnancy
- Exposure time must be reduced by 50% for pregnant patients
Correct answer: Radiographs may be taken when clinically necessary using a lead apron and thyroid collar
According to current guidelines, dental radiographs are safe during pregnancy when clinically indicated and proper shielding (lead apron and thyroid collar) is used; routine postponement is not necessary.
Question 4: A patient with severe trismus (limited mouth opening of less than 20 mm) requires a diagnostic radiographic survey. Which imaging modality is MOST appropriate?
- Standard paralleling technique with size 2 receptor
- Bitewing radiographs only
- Panoramic radiograph or other extraoral imaging (Correct answer)
- Bisecting angle technique with size 1 receptor
Correct answer: Panoramic radiograph or other extraoral imaging
When intraoral receptor placement is impossible due to severe trismus, extraoral imaging such as panoramic radiography provides the necessary diagnostic information without requiring significant mouth opening.
Question 5: When positioning a patient with a physical disability who cannot be transferred from their wheelchair, the BEST approach for intraoral radiographs is to:
- Postpone radiographs until the patient can be transferred to the dental chair
- Tilt the wheelchair back and adjust the X-ray tube head position to accommodate the patient (Correct answer)
- Use only panoramic radiography for all wheelchair-bound patients
- Reduce the number of radiographs taken to minimize positioning challenges
Correct answer: Tilt the wheelchair back and adjust the X-ray tube head position to accommodate the patient
Tilting the wheelchair back and adapting the tube head position allows intraoral radiographs to be taken without requiring patient transfer, maintaining both dignity and diagnostic quality.
Question 6: An elderly patient reports taking bisphosphonate medications for osteoporosis. Which radiographic finding is of PRIMARY clinical concern when reviewing their images?
- Pulp stones in posterior teeth
- Signs of bisphosphonate-related osteonecrosis of the jaw (BRONJ) such as sclerosis or non-healing extraction sites (Correct answer)
- Enamel hypoplasia patterns
- Generalized calculus deposits
Correct answer: Signs of bisphosphonate-related osteonecrosis of the jaw (BRONJ) such as sclerosis or non-healing extraction sites
Bisphosphonates inhibit bone remodeling and can lead to BRONJ, which may present radiographically as areas of sclerosis, non-healing sockets, or sequestra, making early detection critical.
Question 7: When taking radiographs of an elderly patient with severe xerostomia, which consideration is MOST important during receptor placement?
- Increasing kVp to compensate for reduced tissue density
- Being especially gentle during placement as dry mucosa is more fragile and prone to tearing (Correct answer)
- Using only digital sensors to avoid film processing chemicals
- Reducing exposure time to minimize radiation to already compromised tissues
Correct answer: Being especially gentle during placement as dry mucosa is more fragile and prone to tearing
Xerostomia reduces the protective function of saliva and makes oral mucosa more fragile and susceptible to trauma, requiring extra care during receptor placement to avoid lacerations.
DRC Patient Management & Special Populations 1
A patient with a strong gag reflex is struggling with posterior periapical exposures.
Which technique is MOST effective for reducing the gag reflex?