if you are not prone to tooth decay, and if you have not had alot of
dental work in the past (especially crown and brige
work, root canals, or gum surgery) then having 2 or 4 bitewing (cavity detecting xrays as you call them) once per year should suffice. A full set of films need only be taken once every 3-5 years, depending on the patient. And I have to be frank with you.