My step-son is covered under Tricare and United Concordia (the dental plan). In the divorce decree it states that whatever Tricare does not cover she is responsible for. Unless you live near a military base I assume your children are in Tricare Standard rather than Prime? I believe that United Concordia covers about 1/2 of the cost of braces but you have to use one of their orthodontist after your referral from the dentist is put in.