how much is a replacement retainer
1 If not included, replacement retainers can cost $70-$250 for one or $140-$500 or more for a set. 2  Most dental insurance does not cover replacement retainers. 3  Removable Essix retainers made of vacuum-formed clear plastic typically cost $100-$250 for one or $200-$500 for a set. Most dental insurance does not cover replacement retainers. 2  Removable Essix retainers made of vacuum-formed clear plastic typically cost $100-$250 for one or $200-$500 for a set. 3  They are prone to warping or breaking, so they may need replacing to be replaced relatively frequently.