上颌尖牙（maxillary canine）是全口牙中牙体和牙根最长的牙。
结论治疗后上颌尖牙宽度净增加量较下颌稳定；
Results Only maxillary and mandibular intercanine width was expanded significantly during treatment.
目的探讨上颌尖牙阻生的正畸治疗及相关问题。
Objective To discuss the orthodontic therapy and the associated problems of the patients with maxillary impacted canine.
上颌第三磨牙和上颌尖牙分别是第二及第三常见的部位。
The maxillary third molars and maxillary canines are the second and third most common areas of occurrence, respectively.
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