应用锥形束CT分析上颌第三磨牙对骨性Ⅱ类错[牙合]患者上颌磨牙近远中倾斜角度的影响  

Cone beam computed tomography analysis the effect of maxillary third molars on mesiodistal angulation of maxillary molars in patients with skeletal classⅡmalocclusion

作　　者：李军 刘佼佼 高昕 杨勇 孟怡彤 张晓东 Li Jun;Liu Jiaojiao;Gao Xin;Yang Yong;Meng Yitong;Zhang Xiaodong(Department of Stomatology,General Hospital of Northern Theater Command,Shenyang 110000,China)

机构地区：[1]北部战区总医院口腔科,沈阳110000

出　　处：《中国临床实用医学》2022年第6期26-31,共6页China Clinical Practical Medicine

基　　金：辽宁省科学技术计划项目(2019-ZD-1043)。

摘　　要：目的探讨应用锥形束CT(CBCT)分析上颌第三磨牙对骨性Ⅱ类错[牙合]患者上颌磨牙近远中倾斜角度的影响。方法本研究为病例对照研究,选取2018年6月至2022年9月北部战区总医院口腔科收治的骨性Ⅱ类患者87例,男31例,女56例,年龄(25.45±4.75)岁,年龄范围为20~45岁。采用Invivo 5.0软件分别测量不同上颌第三磨牙的阻生情况及下颌平面角及后前面高比值情况下,U6、U7与腭平面及眼耳平面的近远中倾斜角度。结果将所有患者根据上颌第三磨牙的阻生情况分为正位萌出组、高位阻生组及先天缺失组。以腭平面为参考平面时,正位萌出组[(95.85±7.12)°]与高位阻生组[(101.29±3.07)°]U6的角度比较;正位萌出组[(106.29±6.74)°]与高位阻生组[(113.60±3.88)°]U7的角度比较;高位阻生组与先天缺失组[(106.49±8.01)°]U7的角度比较,差异均有统计学意义(P<0.05)。以眼耳平面为参考平面时,正位萌出组[(95.03±6.17)°]与高位阻生组[(98.17±5.01)°]U6的角度比较;高位阻生组与先天缺失组[(104.83±5.82)°]U7的角度比较,差异有统计学意义(P<0.05)。将所有患者根据下颌平面角及后前面高比值分为低角组、均角组及高角组。以腭平面为参考平面时,高角组[(101.00±4.65)°]与均角组[(98.17±6.13)°]U6的角度比较;高角组与低角组[(91.21±5.46)°]U6的角度比较;均角组与低角组U6的角度比较;高角组[(111.29±5.46)°]与均角组[(107.28±8.20)°]U7的角度比较;高角组与低角组[(103.08±6.41)°]U7的角度比较;均角组与低角组U7的角度比较,差异均有统计学意义(P<0.05)。结论上颌第三磨牙的高位阻生使U7牙体长轴远中倾斜,U6也有远中倾斜的趋势。Objective Cone beam computed tomography(CBCT)was used to measure the mesiodistal angulation of maxillary molars in patients with skeletal classⅡmalocclusion,and to analyze the influence of maxillary third molars on the mesiodistal angulation of maxillary molars.Methods This study was a case control study,from June 2018 to September 2022,a total of 87 patients(31 males and 56 females)with skeletal classⅡmalocclusion,aged(25.45±4.75)years old and ranging from 25 to 45 years old,were collected from the department of Stomatology of the General Hospital of Northern Theater Command.Invivo 5.0 software was used to measure the mesiodistal angulation between U6,U7 and the palatal plane and the FH plane under the conditions of different maxillary third molar impaction and mandibular plane angle and posterior anterior height ratio.Results All patients were divided into normal eruption group,high impaction group and congenital absence group according to the impaction of maxillary third molar.When the palatal plane was used as the reference plane,the angle of U6 between the normal eruption group[(95.85±7.12)°]and the high impaction group[(101.29±3.07)°],the angle of U7 between the normal eruption group[(106.29±6.74)°]and the high impaction group[(113.60±3.88)°],and the angle of U7 between the high impaction group and the congenital absence group[(106.49±8.01)°],the differences were statistically significant(P<0.05).When the FH plane was used as the reference plane,the angle of U6 was compared between the normal eruption group[(95.03±6.17)°]and the high impaction group[(98.17±5.01)°],and the angle of U7 was compared between the high impaction group and the congenital absence group[(104.83±5.82)°],the differences were statistically significant(P<0.05).All patients were divided into low angle group,average angle group and high angle group according to mandibular plane angle and posterior anterior height ratio.When the palatal plane was used as the reference plane,there were significant differences in the ang

关 键 词：骨性Ⅱ类 上颌第三磨牙 上颌磨牙倾斜角度 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]