关键词: 偏颌畸形, 下颌偏斜, 正畸治疗, 正畸-正颌治疗

Abstract: In orthodontic clinic，the incidence of facial asymmetry is high，which is complicated and difficult to treat. The main clinical features are the irregular lateral relationship of the upper and lower mandible，the middle line of the upper and lower dentition being not aligned with the middle line of the face，and the mental point being biased to the side of the face. The facial asymmetry not only affects the appearance of the face and the chewing ability of the teeth，but also damages the movement function of the temporomandibular joint and the abnormal changes of the neck position. In this paper，the diagnosis，classification，clinical manifestations and prevention and treatment methods of facial asymmetry are systematically described in order to provide reference for clinical diagnosis and treatment.

Key words: facial asymmetry, mandibular deviation, orthodontic treatment, orthodontic-orthognathic treatment