Dental insurance plans such as PPOs normally have waiting periods before certain dental services are covered under the plan, as well as annual maximum limitations. To avoid avoid exceeding annual maximum benefits or having services before benefits are effective try delaying dental work, if advisable by your dentist.  

As part of dental planning, consumers should consult with their dentists and, if possible, delay work that would push costs over what they are covered for by their dental insurance plan. Individual dental insurance plans may work on a calendar year basis or they may be subject to other start and end dates. Consumers should check with specific carriers for details.