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A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems

  • Authors:
    • Mei‑Lin Li
    • Wei‑Li Liao
    • Hua‑Xiong Cai
  • View Affiliations / Copyright

    Affiliations: Department of Oral Medicine, Haizhu Square Branch, Stomatological Hospital, Southern Medical University (Guangdong Provincial Stomatological Hospital), Guangzhou, Guangdong 510280, P.R. China, Zhujiang New Town Dental Clinic, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 494-499
    |
    Published online on: October 30, 2017
       https://doi.org/10.3892/etm.2017.5399
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Abstract

The aim of the present study was to evaluate the length of dentinal microcracks observed prior to and following root canal preparation with different single‑file nickel‑titanium (Ni‑Ti) systems using micro‑computed tomography (micro‑CT) analysis. A total of 80 mesial roots of mandibular first molars presenting with type II Vertucci canal configurations were scanned at an isotropic resolution of 7.4 µm. The samples were randomly assigned into four groups (n=20 per group) according to the system used for root canal preparation, including the WaveOne (WO), OneShape (OS), Reciproc (RE) and control groups. A second micro‑CT scan was conducted after the root canals were prepared with size 25 instruments. Pre‑ and postoperative cross‑section images of the roots (n=237,760) were then screened to identify the lengths of the microcracks. The results indicated that the microcrack lengths were notably increased following root canal preparation (P<0.05). The alterations in microcrack length in the OS group were more significant compared with those in the WO, RE and control groups (P<0.05). In conclusion, the formation and development of dentinal microcracks may be associated with the movement caused by preparation rather than the taper of the files. Among the single‑file Ni‑Ti systems, WO and RE were not observed to cause notable microcracks, while the OS system resulted in evident microcracks.
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Copy and paste a formatted citation
Spandidos Publications style
Li ML, Liao WL and Cai HX: A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems. Exp Ther Med 15: 494-499, 2018.
APA
Li, M., Liao, W., & Cai, H. (2018). A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems. Experimental and Therapeutic Medicine, 15, 494-499. https://doi.org/10.3892/etm.2017.5399
MLA
Li, M., Liao, W., Cai, H."A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems". Experimental and Therapeutic Medicine 15.1 (2018): 494-499.
Chicago
Li, M., Liao, W., Cai, H."A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems". Experimental and Therapeutic Medicine 15, no. 1 (2018): 494-499. https://doi.org/10.3892/etm.2017.5399
Copy and paste a formatted citation
x
Spandidos Publications style
Li ML, Liao WL and Cai HX: A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems. Exp Ther Med 15: 494-499, 2018.
APA
Li, M., Liao, W., & Cai, H. (2018). A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems. Experimental and Therapeutic Medicine, 15, 494-499. https://doi.org/10.3892/etm.2017.5399
MLA
Li, M., Liao, W., Cai, H."A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems". Experimental and Therapeutic Medicine 15.1 (2018): 494-499.
Chicago
Li, M., Liao, W., Cai, H."A micro-computed tomographic evaluation of dentinal microcrack alterations during root canal preparation using single‑file Ni‑Ti systems". Experimental and Therapeutic Medicine 15, no. 1 (2018): 494-499. https://doi.org/10.3892/etm.2017.5399
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