目的：研究青少年腭部骨质厚度分布，为腭部植入微种植体提供参考。方法：用 NNT Viewer 软件将20例青少年正畸患者的头颅锥形束 CT 扫描数据的腭部情况进行分析，以切牙孔为原点，间隔2 mm，矢状方向分为1～10共10个点，横向分为 A ～F 共6个点，测量统计60个点位的骨厚度，并行统计学分析。结果：B2、B3、C2、C3、D3、E3、E4、F4、F5各点间差异无统计学意义（P ＞0．05）；而 F3点与 B2、B3、C2、C3、D3、E3、E4、F4、F5各点间的差异具有统计学意义（P ＜0．05）；D3与 D4间差异具有统计学意义（P ＜0．05）。结论：适于微种植体植入的部位在腭中缝左右2～4 mm、离切牙孔4～6 mm 区域，而距腭中缝8～10 mm、离切牙孔6～8 mm 区域较为安全，同时可获得厚度为6 mm 左右的骨组织支持。%Objective:To study the thickness distribution palatal bone in adolescents and provide a clinical reference for implanting mini-screws.Methods:Cone-beam CT head scan data of palate of 20 adolescent orthodontic patients were measured with NNT Viewer software.60 points of the palate bone on one side were designed as 1 -10 in sagittal direction and as A -F in transvers direction with incisive foramen as the point of A and 0,the distance between each 2 adjacent points was 2 mm.The bone thickness of the 60 points were measured and statistically analyzed.Results:There were no significant differences among B2,B3,C2,C3,D3,E3,E4,F4 and F5(P >0.05).Statistically significant difference was found between F3 and B2 or B3,C2,C3,D3,E3,E4,F4 and F5(P <0.05).There was significant difference between D3 and D4(P <0.05).Conclusion:The appropriate areas for implanting mini-screws in palate may be about 2 -4 mm near the palatal suture and 4 -6 mm behind incisor canal,and 8 -10 mm near the palatal su-ture,6 -8 mm behind incisor canal.Those regions are safe for implanting mini-screws and can provide about 6 mm bone tissue sup-port.
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