Regulation and Quality Improvement Authority rules require any location hosting dental treatment to be formally registered with the inspectorate.
The vast majority of hotels do not possess this specific registration status for medical activities.
The Northern Ireland Hotels Federation confirmed it has distributed guidance from the British Dental Association to its membership regarding these requirements.
Two scheduled events in Belfast have been called off after BBC News NI investigated their compliance status.
These cancellations resulted from direct enquiries made by the news organisation about the legal standing of the venues.
Anyone providing dental services across the United Kingdom must hold registration with the General Dental Council.
The Ramada Hotel was contacted for a response to the reported incidents.
No further details on future arrangements have been confirmed at this time.