锥形束CT图像经Planmeca Romexis软件三维影像重建鲁西南地区汉族人下颌第一恒磨牙牙根及根管的变异

发布时间：2018-04-26 21:22

本文选题：磨牙 + 牙根　；参考：《中国组织工程研究》2017年16期

【摘要】：背景:下颌第一恒磨牙牙根数目多,根管形态复杂,存在一定变异性且种族差异较大,研究该牙的牙根及根管变异对提高根管预备效果、减少根管遗漏具有重要的意义。目的:应用锥形束CT调查鲁西南地区汉族人下颌第一恒磨牙牙根及根管变异情况。方法:选取2012年9月至2015年10月在济宁医学院附属医院口腔科行锥形束CT扫描的患者656例,要求双侧下颌第一恒磨牙均在,且发育完全,外观形态完整,未经治疗。锥形束CT图像经Planmeca Romexis软件三维影像重建,观察鲁西南地区汉族人下颌第一恒磨牙牙根及根管变异特点。结果与结论:(1)在1 312颗下颌第一恒磨牙中,2个牙根的下颌第一恒磨牙发生率为70.66%(927/1 312),根管变异型以2个牙根3个根管为主,占48.09%(631/1 312);(2)远舌根的个体发生率为35.37%(232/656),远舌根在所有牙齿中的发生率为29.34%(385/1 312),远舌根的对称性发生率为68.95%(153/232),远舌根的发生率男性高于女性,差异有显著性意义(P0.05),右侧高于左侧,差异有显著性意义(P0.05);(3)鲁西南地区汉族人下颌第一恒磨牙大部分有2个牙根,2个牙根3个根管是主要的根管变异类型,远舌根的发生率较高。利用锥形束CT对牙根和根管变异进行分析,可以为临床根管治疗提供参考依据。
[Abstract]:Background: the root number of the first mandibular permanent molar is large, the root canal morphology is complex, there is certain variability and racial difference. It is important to study the root and root canal variation of this tooth to improve the root canal preparation effect and reduce the root canal omission. Objective: to investigate the root and root canal variation of mandibular first permanent molar in Han nationality in southwest Shandong province by conical beam CT. Methods: from September 2012 to October 2015, 656 patients underwent conical beam CT scanning in the Department of Stomatology, affiliated Hospital of Jining Medical College. Cone-beam CT images were reconstructed by Planmeca Romexis software to observe the root and root canal variation of the first permanent molar of Han nationality in southwest Shandong. Results and conclusion among 1 312 mandibular first molars, the incidence of the first molar in 2 roots was 70.66 / 927 / 1 312, and the root canal variant was mainly 2 root and 3 root canals. The individual incidence of distal tongue root was 35.3737 / 232 / 656, and the incidence of distal tongue root in all teeth was 29.3435 / 1312, and the symmetry rate of distal tongue root was 68.95 / 153 / 232.The incidence of distal tongue root in males was higher than that in women, and the right side was higher than that in left side. The difference was significant (P 0.05). Most of the mandibular first permanent molars had 2 roots, 2 roots and 3 root canals were the main root canal variation type, and the incidence of distal tongue root was higher. The analysis of tooth root and root canal variation by conical beam CT can provide reference for clinical root canal therapy.
【作者单位】：济宁医学院附属医院口腔科;
【分类号】：R781.05;R816.98

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