There are no age boundaries for wearing an orthodontic appliance. Adults are always better with fixed appliances because growth and development are finished.
Preconditions for any appliance install is a healthy periodontium, as well as healthy teeth, responsible hygiene, and to regularly visit your orthodontist.
Adults with visible malocclusion often experience difficulties when chewing and swallowing, as well as jaw pains. Malocclusion raises chances for cavity and parodontopathy because it makes maintaining good mouth hygiene difficult and leads to occlusal trauma.
When treating you, your orthodontist sometimes has to cooperate with your dentist or prosthetist to better prepare your teeth for optimum appliance installement. Propper treating of teeth that will serve as bridge carriers is of utmost importance.