You may have to change the permanent retainer at some point. And finally, the offender can only be restless. It can rub against your tongue and be irritating. The most significant defect of permanent retainers is the possibility of bacteria and plaque build up, or tartar build up.
So, despite being called “permanent,” it is possible that you will have to change it at some point. And finally, the permanent retainers can only be restless. It can rub against your tongue and be annoying. The biggest drawback of permanent retainers is the possibility of bacteria and tartar build up, or plaque build up formation.