If a wrestler has orthodontics aka braces, then they must have a mouthpiece for them.

Here is where it gets interesting. If the wrestler has braces on only the top or only the bottom, then the mouthpiece need only cover the areas where these devices are present. So if they only have braces on top then the mouthpiece need only cover the top braces, and likewise the bottom if they have only bottom braces. If they have both top and bottom braces then the mouthpiece has to cover both.

Regardless of whether braces are on only top, only bottom, or both, the mouthpiece MUST include occlusal portion ( meaning it must have a part which separates the biting surfaces. You see that as the small plastic which rests between the upper and lower teeth.