In general, basic dental insurance coverage includes three categories. 

1. Preventive Care
   This covers basic dental costs that are meant to prevent dental problems. These services include cleaning, checkups, and scheduled x-rays meant to prevent tooth and gum disease. This coverage is generally covered at the higher cost share by the insurance company to encourage people to seek regular dental care to prevent more complicated and costly problems.
2. Basic Procedures
   Includes fillings, extractions, and periodontal Maintenance. Most plans cover a portion of these services.
3. Major Services
   Major serivces includes crowns, root canals, bridges, dentures, etc.