1) affects the normal function of oral cavity: it reduces the chewing efficiency of teeth, affects oral pronunciation, and may even cause temporomandibular joint disorder, migraine and other problems.
2) Affect periodontal tissue health and oral hygiene: it may cause dental calculus accumulation, dental caries and gum periodontal problems.
3) Affect mental health: Tooth deformity leads to inferiority complex and can't let go of laughter.