What is a common role of dental nurses during a patient appointment?

A common role of dental nurses during a patient appointment is taking and managing X-rays. This responsibility is crucial as it involves preparing the patient, positioning the X-ray equipment properly, and ensuring that the images are clear and diagnostic. Dental nurses are trained in radiography and help in obtaining the necessary images that allow dentists to diagnose dental issues accurately.

In comparison, performing root canal treatments and developing treatment plans are typically tasks designated for dentists, as they require specific clinical training and expertise to carry out effectively. Consulting patients about treatment outcomes also falls primarily within the dentist's role, as it involves professional interpretation of results and recommendations based on clinical findings. Thus, the responsibility of taking and managing X-rays aligns with the scope of practice for dental nurses, making it the correct answer.