A facility shall provide adequate facilities and equipment for the delivery of dental hygiene services; Each time a patient receives dental hygiene services under general supervision, the dental hygienist shall determine, before initiation of treatment, that there has been no change in the patient's medical history; If there is a change in the medical history of the patient, the dental hygienist shall consult with the supervising dentist, the patient's own dentist, the facility's dental consultant, or the patient's treating physician before providing dental hygiene services; and All recall patients seen by a dental hygienist working under general supervision shall be scheduled for an oral examination with a dentist every 6 months or as otherwise recommended by the supervising dentist.