Affiliation:
1. Department of Endodontics, College of Dentistry, Sinai University, Cairo, Egypt
2. Assistant Professor of Endodontics, Suez Canal University, King Salman International University, Egypt
Abstract
Introduction:
Numerous nickel–titanium (NiTi) rotary systems have been released on the market with noncutting tips, various cross sections, and production techniques. This research was carried out to assess the quantity of remaining dentin thickness of mandibular first molar root canal at 3, 6, and 9 mm far from the anatomic peak that prepared through contemporary rotating systems with different metallurgical properties with a cone-beam computed tomography (CBCT).
Materials and Methods:
In this investigation, 45 human mandibular first molars that had been extracted were employed. Teeth were accordingly divided into three main groups through the NiTi rotary system that was utilized in canal instrumentation (15 teeth each), such that all ranges of curvatures were equally represented in each group – Group A: EdgeFile X3 rotating system, Group B: ProTaper Next (PTN) rotating system, and Group C: ProTaper (PT) rotating system. The samples were scanned before and after instrumentation using CBCT, and by deducing the instrumented canals from the uninstrumented counterpart, the remaining dentin thickness for each root canal is calculated at three levels of each root (3, 6, and 9 mm away from the root end). Data were statistically analyzed.
Results:
A significantly higher mean value was scored in PT, followed by PTN, and the lowest value was found in X3 of canal transportation at the level of 3 mm (P < 0.001), whereas at the 6- and 9-mm levels, there was no substantial difference statistically through the levels.
Conclusion:
The EdgeFile X3 showed the lowest canal transportation at a 3-mm level from the apex in comparison to the other tested files.