orthodontics needed if your teeth are crowded or crooked or your smile is not arranged, you may need to straighten your teeth. The orthodontic forms a continuous light pressure on the teeth for a relatively long time. This light pressure directs the teeth in the desired direction after the teeth move. The bone surrounding the roots of the teeth is forming itself around the new sites of the teeth. This movement is very important, which prevents the return of teeth to the old place after the completion of treatment.