首页> 外文期刊>生物医学研究杂志(英文版) >Cone-beam computed tomography analysis of curved root canals after mechanical preparation with three nickel-titanium rotary instruments
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Cone-beam computed tomography analysis of curved root canals after mechanical preparation with three nickel-titanium rotary instruments

机译:机械制备三台镍钛旋转仪后对锥形根管进行锥束计算机断层扫描分析

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摘要

Cone beam computed tomography is a 3-dimensional high resolution imaging method. The purpose of this study was to compare the effects of 3 different NiTi rotary instruments used to prepare curved root canals on the final shape of the curved canals and total amount of root canal transportation by using cone-beam computed tomography. A total of 81 mesial root canals from 42 extracted human mandibular molars, with a curvature ranging from 15 to 45 degrees, were selected. Canals were randomly divided into 3 groups of 27 each. After preparation with Protaper, Revo-S and Hero Shaper, the amount of transportation and centering ability that occurred were assessed by using cone beam computed tomography. Utilizing preand post-instrumentation radiographs, straightening of the canal curvatures was determined with a computer image analysis program. Canals were metrically assessed for changes (surface area, changes in curvature and transportation) during canal preparation by using software SimPlant; instrument failures were also recorded. Mean total widths and outer and inner width measurements were determined on each central canal path and differences were statistically analyzed. The results showed that all instruments maintained the original canal curvature well with no significant differences between the different files (P=0.226). During preparation there was failure of only one file (the protaper group). In conclusion, under the conditions of this study, all instruments maintained the original canal curvature well and were safe to use. Areas of uninstrumented root canal wall were left in all regions using the various systems.

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  • 来源
    《生物医学研究杂志(英文版)》 |2013年第4期|326-335|共10页
  • 作者单位

    Department of Endodontics,Faculty of Oral and Dental Medicine,Cairo University,Cairo 65239,Egypt;

    Department of Endodontics,Faculty of Dentistry,Umm Al Qura University,Makkah,Saudi Arabia;

    Lecturer of Radiology,Faculty of Oral and Dental Medicine,Cairo University,Cairo 65239,Egypt;

    Department of Dental Biomaterials,Faculty of Dentistry,Mansoura University,Mansoura 35516,Egypt;

    Conservative Dentistry Department,Faculty of Dentistry,Umm Al Qura University,Makkah 715,Saudi Arabia;

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  • 入库时间 2022-08-19 03:48:00
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