Micro-computed tomographic assessment of the shaping ability of the One Curve, One Shape, and ProTaper Next nickel-titanium rotary systems

Pelin Tufenkci; Kaan Orhan; Berkan Celikten; Burak Bilecenoglu; Gurkan Gur; Semra Sevimay

doi:10.5395/rde.2020.45.e30

Micro-computed tomographic assessment of the shaping ability of the One Curve, One Shape, and ProTaper Next nickel-titanium rotary systems

Restor Dent Endod. 2020 May 22;45(3):e30. doi: 10.5395/rde.2020.45.e30. eCollection 2020 Aug.

Authors

Pelin Tufenkci¹, Kaan Orhan^{2

3

4}, Berkan Celikten⁵, Burak Bilecenoglu⁶, Gurkan Gur⁷, Semra Sevimay⁵

Affiliations

¹ Department of Endodontics, Faculty of Dentistry, Hatay Mustafa Kemal University, Antakya, Turkey.
² Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey.
³ OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.
⁴ Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
⁵ Department of Endodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey.
⁶ Department of Anatomy, Faculty of Dentistry, Ankara University, Ankara, Turkey.
⁷ Department of Conservative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey.

Abstract

Objectives: This micro-computed tomographic (CT) study aimed to compare the shaping abilities of ProTaper Next (PTN), One Shape (OS), and One Curve (OC) files in 3-dimensionally (3D)-printed mandibular molars.

Materials and methods: In order to ensure standardization, 3D-printed mandibular molars with a consistent mesiobuccal canal curvature (45°) were used in the present study (n = 18). Specimens were instrumented with the OC, OS, or PTN files. The teeth were scanned pre- and post-instrumentation using micro-CT to detect changes of the canal volume and surface area, as well as to quantify transportation of the canals after instrumentation. Two-way analysis of variance was used for statistical comparisons.

Results: No statistically significant differences were found between the OC and OS groups in the changes of the canal volume and surface area before and after instrumentation (p > 0.05). The OC files showed significantly less transportation than the OS or PTN systems for the apical section (p < 0.05). In a comparison of the systems, similar values were found at the coronal and middle levels, without any significant differences (p > 0.05).

Conclusions: These 3 instrumentation systems showed similar shaping abilities, although the OC file achieved a lesser extent of transportation in the apical zone than the OS and PTN files. All 3 file systems were confirmed to be safe for use in mandibular mesial canals.

Keywords: Microtomography; Root canal preparation; Transportation; X-ray.