Appearances notwithstanding, properly aligned teeth promote good oral health. Patients with dental crowding are more likely to have tartar build up between the teeth.
In addition, if the teeth are not as straight as they should be, it is more difficult for the bristles of toothbrushes to reach the most inaccessible areas, so it is more common for remnants of food to stay in the mouth.
The use of orthodontic apparatus also corrects misalignments in occlusion. Very often, a bad bite causes jaw problems and problems that can trigger muscle contractions should they worsen.