Vivera also price ranges its retainers in sets of 4, which raises the cost. Dr. Pinto says that”In my apply, we use Invisalign’s Vivera retainers. I like that they provide you 4 sets, so you might have backups For a long time.”ปัจจุบันมีผู้ผลิตทำรีเทนเนอร์แฟชั่นมาจำ