When an orthodontic scan has been captured with the intent of fabricating an appliance that will alter the position of teeth and/or jaws it is imperative that a licenced dentist/ orthodontist perform an in-person exam to avoid missing data and to make the proper diagnosis to deliver the correct treatment plan. I've witness too many times when a doctor is not an active part of the equation and the result is the wrong diagnosis and irreversible harm to the patient.