The trumpet is the smallest member of the brass family. The sound on trumpet is produced by air and vibration into a small mouthpiece.
While orthodontia is somewhat troublesome at first to a trumpet player, it is not impossible to make good sounds with braces. It is suggested to not change anything orthodontia-wise in the middle or during the beginner year. A slight overbite is okay, but an underbite can severely hinder progress on cornet / trumpet. Cornet / trumpet players come in all shapes and sizes.
Trumpet parts usually have the melody (recognizable) part, therefore students who choose and are selected for trumpet should exhibit a confident demeanor, strong personality, and demonstrate a high level of self-motivation.