The process for getting a night guard is simple and completely painless. The dentist makes an impression of your teeth. The impression is used for creating the mould that the lab uses to fabricate your night guard out of durable plastic. The dentist will then check the guard to ensure that it fits properly. You have to wear the guard before going to bed.
It is always best to get a customized night guard rather than wearing an over-the-counter available guard, as the shape and size of every individual's teeth is different and such guards do not fit properly.