Dental Orthodontic Essix Retainers | Custom fit UPPER & LOWERCustom made Orthodontic Dental Retainers, to hold your teeth in place after completion of Clear aligner therapy or fixed brace treatment. The same as you receive from your Dentist at more than half the price, free protective case included. THESE ARE TOP QUALITY REPLACEMENT RETAINERS The Retainer will control the natural tendency of the teeth to shift even after a teeth alignment procedure such as fixed metal ceramic braces or invisalign clear aligner