上颌磨牙牙根及根管解剖形态的锥形束CT研究

发布时间：2018-06-07 08:16

本文选题：磨牙 + 牙髓腔　；参考：《北京大学学报(医学版)》2014年06期

【摘要】：目的:通过锥形束CT(cone-beam computed tomography,CBCT)图像分析上颌恒磨牙牙根和根管的解剖形态。方法:对2012年5~9月因牙体牙周疾病行CBCT检查的患者资料进行回顾性分析。健康、未经过治疗、发育良好的630颗上颌第一磨牙、519颗上颌第二磨牙被纳入本研究,分析每颗磨牙的牙根数目、根管数目及根管形态,采用Vertucci分类法对根管构型进行分类描述。将VertucciⅠ型计为常规形态,其他类型计为变异形态,计算变异率。结果:上颌第一磨牙中,2.38%有2个独立牙根,97.14%有3个牙根,0.48%有4个牙根。上颌第二磨牙中,10.41%为单根牙,15.22%有2个牙根,73.60%有3个牙根,0.77%有4个牙根。存在3个牙根的612颗上颌第一磨牙中,近中颊根变异率为30.88%;存在3个牙根的382颗上颌第二磨牙中,近中颊根变异率为13.87%。结论:CBCT精确地显示了关于牙根及根管数目与形态的三维图像,这为疑难根管治疗提供了直观而准确的信息。
[Abstract]:Objective: to analyze the anatomical morphology of root and root canal of maxillary permanent molar by conical bundle CT(cone-beam computed tomographic CT image. Methods: the data of patients with periodontal disease by CBCT from May to September 2012 were analyzed retrospectively. A total of 630 maxillary first molars, 519 maxillary second molars, which were healthy and untreated, were included in this study. The root number, root canal number and root canal morphology of each molar were analyzed. The root canal configuration was classified and described by Vertucci classification. The Vertucci type I was counted as the normal form, while the other type was counted as the variant form, and the rate of variation was calculated. Results: 2.38% of the maxillary first molars had two independent teeth, 97.14% had 3 teeth, 0.48% had 4 roots. Of the maxillary second molars, 10.41% were monodontoid (15.22%), 2 roots were found in 73.60%, and 3 roots were found in 0.77% of the maxillary second molars. There were 4 roots in 10. 41% of the maxillary second molars. In 612 maxillary first molars with 3 roots, the variation rate of proximal buccal root was 30.88 and that of 382 maxillary second molars with 3 roots was 13.87. Conclusion the three dimensional images of root and root canal number and morphology are accurately displayed by the: CBCT, which provides intuitionistic and accurate information for the difficult root canal therapy.
【作者单位】：中日友好医院口腔医学中心;北京大学口腔医学院·口腔医院放射科;
【分类号】：R781.05

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