Abstract
The aim of this study was to assess the shaping ability of the XP Shaper (XPS) file in severely curved canal models under simulated body temperature and compare it with that of the WaveOne Gold (WOG) file. Ninety-six simulated root canals were equally distributed into XPS and WOG systems to be shaped by eight files each. Files were assessed under a stereomicroscope prior to canal shaping to detect deformation if any. The canals were shaped at 35 ± 1°C using the X-Smart Plus motor. Images of the canals were obtained before and after instrumentation using a stereomicroscope to measure the amount of removed resin from both the inner and outer curvature sides at apex (0 mm) and 3 mm and 6 mm from the apex. The shaping time was calculated. The data were statistically analyzed by the independent t-test at 5% significance level. The XPS and WOG systems shaped the canals in 37.0 ± 9.5 and 62.6 ± 11.3 seconds (P < 0.05), respectively. At the apex level, the amount of resin removal in both sides did not show a significant difference between the tested groups (P > 0.05). At 3 mm and 6 mm levels, the WOG removed more resin than XPS at both sides (P < 0.05). In XPS, deformation was observed in four files: one file after the first use, one file after the fourth use, and two files after the sixth use. In WOG, two files were deformed: one file after the fifth use and one file after the sixth use. One XPS file was fractured after the sixth use. In short, XPS and WOG files can be used in shaping severely curved canals as they showed the ability to maintain the original shape with minimal transportation. Both file systems showed signs of deformation after use with a lower number of deformed files observed in WOG throughout the experiment.
Highlights
High-quality chemomechanical debridement of the intricate root canal system is paramount to the success of endodontic therapy. is is required in order to eradicate bacteria and its metabolic substrate which are responsible for the initiation and persistence of endodontic disease [1]. e endodontic file is used to remove intracanal pulpal tissues, microbial biofilm, and toxic byproducts and to develop a continuously tapering canal while maintaining the canal geometry that allows for the delivery of irrigating solutions and intracanal medicaments as well as the three-dimensional filling of the root canal system [2]
In terms of canal transportation, there were no significant differences between the experimental groups at the three levels
At the canal exit level, the amounts of resin removal in both sides were comparable the tip sizes and tapers of XP Shaper (XPS) and WaveOne Gold (WOG) files are different. is might be attributed to many factors such as the file’s properties, geometry, and the mechanism of action. e XPS file has a 1% taper that, under intracanal temperature, will appear as a snake in shape which allows shaping the canal in three dimensions with minimal stress
Summary
High-quality chemomechanical debridement of the intricate root canal system is paramount to the success of endodontic therapy. is is required in order to eradicate bacteria and its metabolic substrate which are responsible for the initiation and persistence of endodontic disease [1]. e endodontic file is used to remove intracanal pulpal tissues, microbial biofilm, and toxic byproducts and to develop a continuously tapering canal while maintaining the canal geometry that allows for the delivery of irrigating solutions and intracanal medicaments as well as the three-dimensional filling of the root canal system [2]. Stainless steel hand files have been used to perform canal shaping. These files are stiff and associated with increased operator fatigue, and when used in the preparation of curved root canals, the restoring forces of the files tend to return the file back to its original shape, resulting in canal transportation [3]. Nickel-titanium (NiTi) files are broadly used to shape the root canals owing to their increased flexibility, rapid and centered canal preparation, safer preparation of curved canals, improved cutting efficiency, and improved treatment outcome [3, 5]. In spite of International Journal of Dentistry all these advantages, the main limitation in the use of a NiTi file is the risk of their fracture, especially when it is autoclaved and reused [6, 7]. e NiTi file fracture may occur from torsional fatigue, cyclic fatigue, or both [8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
