上颌侧切牙（maxillary lateral incisor）位于上颌中切牙的远中，形态与上颌中切牙基本相似，但较上颌中切牙体积稍小，形态窄长。上颌侧切牙的形态变异较多，常见为锥形或先天缺失。与上颌中切牙的主要区别为：
目的：研究上颌侧切牙畸形根面沟的外形。
AIM: To study the morphology of deform root groove in the maxillary lateral incisors.
目的：观察用粘结桥、单端固定桥两种方法联合修复上颌侧切牙缺失的临床效果。
Objective: to evaluate a method to restore maxillary lateral incisor with adhesion and cantilever bridge.
结果缺牙部位最常见的是下颌中切牙、上颌侧切牙和下颌侧切牙，以少数牙缺失为主，女性多于男性。
Results mandible central incisor, maxillary lateral incisor and mandible lateral incisor were most missing teeth, and there were more females than males.
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