Teeth are located in an area where there are active muscle groups such as cheeks, lips and various mouth functions take place. Due to this, mobility of teeth lasts a lifetime.
Teeth become exposed to negative effects of muscles around the mouth, masticatory forces and in some cases wisdom teeth with the removal of fixed braces. For this reason, fixed or mobile retention appliances are applied to the teeth after the orthodontic treatment.
The period of time to keep the retention apparatus fixed in the mouth varies from case to case. There are no disadvantages in keeping them inside the mouth for a long period of time as they are hygienic and esthetic.