华西口腔医学杂志

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微焦点CT技术测定根管预备后根管偏移

陈颖1,2 高波2 杨锦波2 柳茜2   

  1. 1.郑州大学第四附属医院牙体牙髓病科, 河南郑州450052;2.口腔疾病研究国家重点实验室, 四川大学, 四川成都610041
  • 收稿日期:2009-10-25 修回日期:2009-10-25 出版日期:2009-10-20 发布日期:2009-10-20
  • 通讯作者: 杨锦波,Tel:028-85501439
  • 作者简介: 陈颖(1982—),女,河南人,住院医师,硕士
  • 基金资助:

    四川大学青年科学研究基金资助项目(0040305505029)

Micro-CT evaluation of root canal deviation after preparation

CHEN Ying1,2, GAO Bo2, YANG Jin-bo2, LIU Qian2   

  1. 1. Dept. of Cariology and Endodontology, The Fourth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; 2. State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
  • Received:2009-10-25 Revised:2009-10-25 Online:2009-10-20 Published:2009-10-20
  • Contact: YANG Jin-bo,Tel:028-85501439

摘要:

目的通过微焦点CT技术建立一种新的根管偏移评价体系。方法选用树脂人工弯曲根管模型,使用手用镍钛ProTaper按照冠向下方法预备模型,并用微焦点CT扫描收集数据,运用计算机高级语言软件处理分析其截面前后中心点及面积的变化,评价ProTaper对树脂弯曲根管的预备效果,并建立关于预备前后中心点的三维模型。结果手用镍钛ProTaper预备后的根管,同一截层面积大小基本一致。通过对微焦点CT扫描数据的处理,建立起了根管预备前后根管偏移的二维和三维指标结合评价的比较体系。ProTaper对根尖段定位成形能力较好,预备前后根管偏移小。结论利用微焦点CT建立三维根管中心轴模型,可以为分析根管预备器械的成形能力提供一种新的途径。结合二维的截面面积,可以分析得出更加直观的根管预备后根管偏移情况。

关键词: 微焦点CT, 根管偏移, 根管预备, 弯曲根管

Abstract:

Objective To establish a new evaluation system of curved root canal deviation by the technique of micro-CT. Methods Curved simulated root canals were prepared with ProTaper NiTi -hand files by crown -down technique. After root canals were scanned by micro-CT and analyzed by image processing software, the planar area and centers′ transportation of each cross-section were compared to evaluate the prepare effect of ProTaper, and a three-dimensional model about it were established. Results The same cross-section′s area of the root canals which was prepared with ProTaper NiTi-hand files were essentially consistent. With the data analysis of micro-CT, a system of combining planar and three -dimensional index to evaluate the root canal deviation were established. The shapes of root canal before and after prepared with ProTaper showed less deviation, which proved the shaping ability of ProTaper could meet the requirements for clinical use. Conclusion A three-dimensional root canal central axis model is established using micro-CT. It provides a new method to analyze the shaping ability of the instrumentation after root canal preparation. It will give us a more direct view to analyze the situation of the root canal deviation combining the two-dimensional image and the three-dimensional model.

Key words: micro-CT, root canal deviation, root canal preparation, curved root canal