Extra NHS dental appointments promised by the government will only cover a third of the people who need urgent care, say leading dentists.
However, the BDA cites an NHS England letter to local health leaders which estimates 2.2 million people who need treatment currently cannot get an appointment.
The poll of 1,600 members of Dental Protection, part of the Medical Protection Society, also found 50% felt pressurised to take extra work to meet demand for NHS appointments.
The extra appointments will be focused on England's "dental deserts" - places where people struggle to get NHS treatment.
This suggests 1.5 million people could still be left untreated despite the government initiative, a key part of its health manifesto.