There are removable and fixed retainers. Fastened retainers are also called bonded retainers and are connected to the back again of teeth with dental bonding. They are most popular usually for young people who find themselves unlikely to keep up with their retainer without having it getting fastened into position. https://orthodontic-products81234.bloggosite.com/39704890/everything-about-orthodontic-products-in-uk