下颌第一、二恒磨牙牙根变异的锥形束CT观察

发布时间：2018-03-02 23:00

本文选题：下颌恒磨牙　切入点：锥形束CT　出处：《上海口腔医学》2014年02期 　论文类型：期刊论文

【摘要】：目的:揭示华东地区中国人下颌第一、二恒磨牙各型牙根变异的发生状况。方法:调取苏州口腔医院放射科接受锥形束CT扫描的患者的CT图像资料,共261例患者。观察下颌恒磨牙牙根变异的牙发生率、个体发生率及双侧分布状况。采用SPSS 13.0软件包对数据进行x~2检验、Spearman等级相关分析。结果:下颌第一恒磨牙远舌根变异的牙发生率为24.7%(108/437牙),个体发生率为27.9%(56/201人),双侧共同发生率为66.1%(37/56),相关系数为0.738(P0.01)。下颌第二恒磨牙C形根的牙发生率43.3%(180/416牙),个体发生率为49.7%(96/193人),双侧共同发生率为79.2%(76/96),两侧相关系数为0.790(P0.01);女性发生率均高于男性(P0.05)。上述2种牙根变异之间未发现显著相关性(r=0.033,P0.05)。结论:下颌第一恒磨牙远舌根变异及下颌第二恒磨牙C形根在华东地区人群中具有较高的发生率,掌握其分布特点具有重要的临床指导意义。
[Abstract]:Objective: to reveal the occurrence of root variation of the first and second permanent mandibular molars in East China. Methods: the CT images of the patients receiving conical beam CT scan in the Department of Radiology of Suzhou Stomatology Hospital were collected. The incidence of root variation in mandibular permanent molars was observed in 261 patients. Individual incidence and bilateral distribution were analyzed by using SPSS 13.0 software package. Results: the incidence of tooth variation in the distal tongue root of mandibular first permanent molar was 24.710 8 / 437, and the individual incidence was 27.9g / 56201. The incidence of lateral co-occurrence was 66.1g / 56, and the correlation coefficient was 0.738 / P0.01.The incidence rate of C-shaped root of mandibular second permanent molar was 43.33 / 416, the individual incidence was 49.7 / 96 / 193, the incidence of bilateral co-occurrence was 79.2% 76 / 9696, and the correlation coefficient of both sides was 0.790 / P0.01; the incidence of female was higher than that of male. No significant correlation was found between the two kinds of tooth root variation. Conclusion: the variation of the distal tongue root of the first mandibular permanent molar and the C-shaped root of the second permanent molar of the mandible have a high incidence in the population of East China. It has important clinical guiding significance to master its distribution characteristics.
【作者单位】：苏州口腔医院牙体牙髓病科;苏州市吴江区第一人民医院口腔科;
【分类号】：R816.98

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