These retainers consist of a piece of wire often glued to the backs of the bottom-six front teeth. We can also place them behind the back of the top-front teeth. This is helpful if you have a large gap between the teeth. These retainers are permanent. Only an orthodontist or dentist has the tools to remove them. In addition, they are convenient, subtle, and long-lasting with proper care. Also, flossing each day is important for your oral health.