Black triangle is common phenomenon in our dental clinical treatment, the etiology, diagnosis and treatment of which involving periodontics, prosthodontics and orthodontics. During the dental treatment, we should strengthen the understanding, pay attention to multidisciplinary cooperation, in order to prevent the happening of black triangle effectively. As the increasing of esthetic consciousness, patients put a high demanding on orthodontic treatment. The occurrence of black triangle after orthodontic therapy would not only be unesthetic, but also adversely affect the health of periodontium, occlusal relationship and stability of teeth arrangement. In this article, the prevalence of anterior black triangle after orthodontic treatment, risk factors, diagnosis, treatment and prevention were reviewed, in order to provide a reference for the orthodontic clinical.%黑三角在口腔临床中是较为常见的现象,其病因、诊断和治疗涉及牙周、修复、正畸等多个学科,临床诊疗过程中需要加强对黑三角的认识,注意多学科的密切合作,才能有效地预防黑三角的发生.随着审美意识的增强,正畸患者对治疗提出了更高的要求.正畸治疗后黑三角的发生不仅影响美观,而且严重影响了患者的牙周组织健康、咬合关系以及牙齿排列的稳定性.本文通过对切牙区黑三角在正畸治疗中的发病情况、相关危险因素、诊断、治疗和预防等作一综述,以期为临床提供参考.
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