What is a key reason to perform periodic radiographs during orthodontic treatment?

• A. To replace clinical examination.
• B. To evaluate aesthetics only.
• C. To monitor tooth movement and root position.
• D. To increase X-ray exposure for no benefit.

Answer: (C)

Periodic radiographs in orthodontics provide a view of tooth roots, their position, and the supporting bone that you can’t see from the outside alone. They let you track how teeth move in relation to each other and ensure roots stay on a healthy track as forces guide alignment. This information is essential for confirming that planned movements are occurring, detecting root tipping or misalignment early, and spotting root resorption or changes in bone levels that could affect stability and outcomes. Radiographs also help you monitor the eruption or emergence of teeth and assess adjacent structures that could influence treatment. Because they reveal changes not visible clinically, they guide adjustments to wires, brackets, and bite mechanics to keep treatment progressing as intended. They complement the clinical exam and are used judiciously to balance benefits with radiation exposure, rather than replacing clinical evaluation or serving any cosmetic purpose.