I recently had a dental issue - a crown cracked. I called my dentist and he fixed the crown within a week. Only after the crown was fixed did I learn that Aetna Dental wouldn't pay for it. Apparently, that crown was put on 5 1/2 month ago and my policy only covered crowns applied <=6 months. After my dental office learned that Aetna wasn't covering the crown, they appealed.