Patient: A little deep overlap None Hello doctor! I want to have orthodontics, but I am afraid of damaging the enamel, so I would like to ask if adult orthodontics can damage the enamel. I have lingual orthodontics now, how does it compare to labial self-ligating brackets in terms of effectiveness and treatment time? Thank you! Hou Zhiming, Department of Orthodontics, Dental Hospital of China Medical University Hou Zhiming, Department of Orthodontics, Dental Hospital of China Medical University: Normal orthodontic treatment will not harm tooth enamel unless it is improperly disposed. The effect and treatment time of lingual orthodontics is the same and longer compared to labial self-ligating brackets.