Why is CBCT used selectively in orthodontics?

Why is CBCT used selectively in orthodontics?

• A. To limit radiation exposure while gaining 3D data when needed.
• B. Because it is cheaper.
• C. Because 2D imaging provides all data.
• D. It replaces all radiographs.

Answer: (A)

The idea being tested is that CBCT is used selectively to balance the benefit of three‑dimensional information with the need to minimize radiation exposure. CBCT provides accurate 3D data that can reveal details not visible on standard 2D images—such as the exact position and orientation of impacted teeth, complex root morphology, proximity to critical structures like the mandibular canal, and airway or TMJ relationships. Because this modality delivers a higher radiation dose than conventional radiographs, it should not be used routinely. When 2D imaging already provides sufficient information to diagnose and plan treatment, those simpler radiographs are preferred for lower cost and exposure. Use of CBCT is justified only when the 3D information will meaningfully influence management, and when a smaller field of view and lower-dose protocols can still answer the clinical question.

The idea being tested is that CBCT is used selectively to balance the benefit of three‑dimensional information with the need to minimize radiation exposure. CBCT provides accurate 3D data that can reveal details not visible on standard 2D images—such as the exact position and orientation of impacted teeth, complex root morphology, proximity to critical structures like the mandibular canal, and airway or TMJ relationships. Because this modality delivers a higher radiation dose than conventional radiographs, it should not be used routinely. When 2D imaging already provides sufficient information to diagnose and plan treatment, those simpler radiographs are preferred for lower cost and exposure. Use of CBCT is justified only when the 3D information will meaningfully influence management, and when a smaller field of view and lower-dose protocols can still answer the clinical question.