[Advances in risk factors and early imaging assessment of canine impaction].

The canines play an important role in both the esthetics and function of the human body. The maxillary canines has the highest prevalence of impaction in the entire dentition, except for the third molars. Once canine impaction occurs, it can lead to the conditions such as root resorption of adjacent teeth, occlusal function interference and esthetic problems. Moreover, the treatment of canine impaction is time consuming and difficult, and it often requires multi-disciplinary involvement. Therefore, the early diagnosis and treatment of canine impaction is an urgent problem in orthodontic treatment. The etiology of canine impaction is complex and its early development is highly insidious. To assist orthodontists in the early diagnosis and treatment of canine impaction, this review summarizes and discusses the relevant risk factors associated with maxillary and mandibular canine impaction, and the commonly used radiographic assessment methods.尖牙在人体中承担重要的美观和功能作用。上颌尖牙是全口牙列除第三磨牙外阻生患病率最高的区域，一旦发生尖牙阻生可引发邻牙牙根吸收等病症，干扰咬合功能，影响牙列美观。阻生尖牙的治疗周期长，难度大，常需要多学科的共同参与。因此，尖牙阻生的早期诊断和治疗是正畸临床亟待解决的难题。尖牙阻生病因复杂，疾病发展早期隐匿性高。为帮助正畸医师早期诊断和治疗尖牙阻生，本篇综述总结并讨论上下颌尖牙阻生的相关风险因素，并介绍常用的阻生早期影像学评估方法。.