关键词: 牙间隙；发育性牙间隙；病理性牙间隙；医源性牙间隙；牙间隙修复

Abstract:

Summary：The anterior diastema，an anomaly of dentition，is common in clinic. It has a negative influence on the facial aesthetics，oral function and psychology of the patients. Diastema treatment is one of the main challenges of aesthetic dentistry. This review put forward a systematic classification of anterior diastema for the first time. Based on the cause of diastema，there are developmental，pathological，physiological and iatrogenic diastemas；according to the number of diastema，there could be individual and scattered diastema；it may be divided into narrow，medium，wide，extra-wide diastemas in accordance with its width. The common treatment methods and techniques，such as light-cured resin restoration，porcelain dental restoration and orthodontic treatment are described briefly in the review. Further，we propose for the first time that diastema could be treated by the combined methods （orthodontic treatment plus resin restoration，orthodontic treatment combined with porcelain dental restoration，orthodontic treatment plus dental implant restoration，et al）. Finally some suggestions are given to choose the suitable treatment method according to the cause，width and the number of diastema and other influence factors.

Key words: diastema;developmental diastema;pathologic diastema;iatrogenic diastema;diastema treatment