The removal of braces is not the end of the treatment. A stabilisation period afterwards is very important. Retention devices are orthodontic appliances that stabilise the results of treatment, so that the teeth or jaw do not fall back into their previous, bad position.
There are several reasons why the results do not remain stable. For example:
Removable retention devices such as retention plates or transparent guards must be worn every night for at least a year. Since these devices can be easily lost, and teeth can move back to old positions within a matter of days, a fixed retainer in the upper and lower jaw is strongly recommended.
The fixed retainer is a slender wire, which is glued to the back of the incisors to connect these teeth together and provide stabilisation. This retainer must be worn for at least 7 years, but can even be recommended for life.