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. 2019 Jul-Aug;16(4):272-278.
doi: 10.18502/fid.v16i4.2086. Epub 2019 Aug 30.

Apical Transportation of Mesiobuccal Canals of Maxillary Molars Following Root Canal Preparation with Two Rotary Systems and Hand Files: A Cone-Beam Computed Tomographic Assessment

Pegah Sarraf  1 , Nazanin Kiomarsi  2 , Farrokh Haj Taheri  3 , Behrang Moghaddamzade  4 , Fatemeh Dibaji  1 , Mohammad Javad Kharazifard  5
Affiliations

Apical Transportation of Mesiobuccal Canals of Maxillary Molars Following Root Canal Preparation with Two Rotary Systems and Hand Files: A Cone-Beam Computed Tomographic Assessment

Pegah Sarraf et al. Front Dent. 2019 Jul-Aug.

Abstract

Objectives: This study aimed to compare the transportation of the mesiobuccal canal of maxillary molars following root canal preparation with HyFlex CM (HCM) and Edge Taper Platinum (ETP) rotary systems and stainless steel (SS) hand files using cone-beam computed tomography (CBCT).

Materials and methods: This in-vitro study was performed on 48 maxillary molars in three groups of 16. The teeth were mounted in acrylic blocks, and root canals were prepared using HCM in group 1 (up to #30/0.06), ETP in group 2 (up to F3/0.06), and SS hand files in group 3 (up to #30). CBCT scans were taken before and after root canal preparation. The amount of canal transportation was measured at 0, 3, 6, and 9mm from the apex. Data were analyzed using Kruskal-Wallis and Mann-Whitney tests.

Results: The difference in canal transportation at 0 and 6mm from the apex was significant between the HCM and ETP groups (P=0.031 and 0.023) but none of the systems showed any significant difference with hand files at 0-and 6-mm levels (P=0.10, 0.56, 0.22, and 0.50), respectively. At 3mm from the apex, no significant difference was noted among the groups (P=0.30). At the 9-mm level, the amount of canal transportation was not significantly different between HCM and ETP (P=0.83) but they showed significant differences with hand files (P<0.001).

Conclusion: ETP and HCM caused less canal transportation at the curvature of the mesiobuccal canal of maxillary molars compared to hand files. ETP showed superior efficacy in root canal preparation compared to HCM.

Keywords: Cone-Beam Computed Tomography; Dental Instruments; Maxilla; Molars; Root Canal Preparations; Stainless Steel.

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Conflict of interest statement

CONFLICT OF INTEREST STATEMENT None declared

Figures

Fig. 1:
Fig. 1:
The schematic cone-beam computed tomographic axial view of the root canal before and after preparation
Fig. 2:
Fig. 2:
The error bar of mean and 95% confidence interval of mean of canal transportation before and after root canal treatment by different endodontic files.
See this image and copyright information in PMC

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