Which statement about dental assistant duties in orthodontic practices is incorrect?

In orthodontic practices, the role of a dental assistant encompasses various duties that support both the orthodontist and the patients. However, one key responsibility that falls outside the scope of a dental assistant's role is making a diagnosis. Diagnosis involves evaluating a patient's condition, interpreting clinical findings or radiographs, and determining a treatment plan, which are responsibilities reserved for licensed dental professionals, such as orthodontists or dentists.

In contrast, dental assistants play critical roles in the adjustment of orthodontic appliances, assisting with radiographs, and providing essential patient education. They facilitate the orthodontic process by preparing patients for treatment, managing instruments, and communicating instructions about oral hygiene, but they must work under the authority of the licensed orthodontist, who is the only professional authorized to make clinical diagnoses. Thus, the statement regarding making a diagnosis is indeed the incorrect assertion about dental assistant duties in orthodontic practices.