To avoid the most harmful X-rays, how far must an operator stand from the patient?

The correct distance an operator should maintain from the patient during an X-ray procedure is six feet. This distance is important for reducing exposure to secondary radiation, which can be harmful over time. At six feet, the radiation intensity decreases significantly, allowing for a safer environment for both the operator and any other personnel present. This measure is part of the fundamental principles of radiation safety, including time, distance, and shielding—where increasing distance from the source of radiation is one of the most effective ways to decrease exposure.

Maintaining this distance aligns with guidelines provided by health authorities and professional organizations focused on minimizing radiation exposure in medical and dental settings. It's critical for dental professionals to adhere to these guidelines to ensure the safety of both operators and patients.