上颌第一双尖牙约20%为单根,80%为双根,分叉为3个根者极罕见.笔者发现3例4个上颌第一双尖牙分叉为3个根的病例报告如下. 例1,16岁,男,因正畸减数治疗拔除??.术中拔除困难,3个根均从颈柱处折断.分叉大,酷似上颌第一磨牙.腭侧根最大,次为近颊根,远颊根最小.均细小,稍弯向远中. 例2,21岁,男,壮族,因外科正畸需 About 20% of the maxillary first canine is single, 80% is double root, and the bifurcation of three roots is very rare.I found that 3 cases of 4 maxillary first canine bifurcation for the three root case report As follows: Example 1, 16 years old, male, due to orthodontic reduction treatment of extraction. Difficult to remove during surgery, three roots were broken off from the neck column. Large bifurcation, resembles the maxillary first molar. For the near buccal root, distal buccal root is the smallest .All small, slightly bent to the far .In 2, 21 years old, male, Zhuang, due to orthopedic surgery