Shaping Ability and Buckling Resistance of TruNatomy, WaveOne gold, and XP-Endo Shaper Single-File Systems

Abstract

Objectives: The target of the current study was to evaluate and compare the shaping ability and buckling resistance of various single-file systems (TruNatomy [TRN], WaveOne gold [WOG], and XP-Endo Shaper [XPS]). Materials and Methods: Thirty recently extracted human first mandibular molars were chosen with severely curved mesiobuccal (MB) canals. Following access cavity preparation and determination of working length, teeth were randomly divided into three groups (n = 10) according to the instrumentation technique used, Group 1 (TRN), Group 2 (WOG), and Group 3 (XPS). Preinstrumentation and postinstrumentation, cone-beam computed tomography images were recorded at 3, 5, and 8 mm from the apex representing apical, middle, and coronal levels under the same circumstances, superimposed, and then canal transportation was determined using a particular equation. For buckling resistance calculation, files were loaded in the axial direction of the shaft and the maximum load was determined during the deflection of the file. One-way analysis of variance and Tukey test at 5% significance level were used to analyze data. Pearson's correlation between shaping ability and buckling resistance was performed. Results: XPS and TRN displayed significantly less canal transportation than WOG at the coronal and middle levels. While WOG recorded the highest value of buckling resistance, XPS recorded the least. Conclusions: XPS and TRN preserved the original curvature slightly better than WOG, while WOG reported the highest buckling resistance. There was a positive correlation between canal transportation and instrument resistance to buckle. Clinical Relevance: Preservation of the original shape of the canal after instrumentation is beneficial.

Comparative evaluation of canal transportation and canal centering ability in oval canals with newer nickel–titanium rotary single file systems – A cone-beam computed tomography study

“…It has a regressive taper and an off-centered parallelogram cross-section. [ 15 ] The results of the present study are in agreement with studies conducted by Piţ et al . [ 16 ] and Kabil et al .…”

Comparative Evaluation of Dentinal Crack After Root Canal Preparation Using TruNatomy, Neoendo Flex, and Neoendo Neohybrid Files: An In Vitro Study

“…Stress and strain from using various rotational NiTi endodontic instruments during root canal preparation may cause microcracks or craze lines to appear within the root dentin. The severity attributed to these defects may depend on the flute form, pitch, taper, tip design, cross-sectional configuration, and taper of NiTi instruments [13,14].…”

“…TRN has an off-centered parallelogram cross-section design. It has been argued that TRN instruments maintain the remaining dentine and tooth intactness due to the instrument design, regressive tapers, and thinned design, along with the heat treatment of the NiTi alloy [13].…”

Buckling Susceptibility of a K-File during the Initial Negotiations of Narrow and Curved Canals Using Different Manual Techniques

“…Buckling resistance has been investigated in a few studies using nickel titanium instruments for glide path preparation depending on the test mode (static vs. dynamic) [6] or by testing various single-file systems (TruNatomy, WaveOne gold, and XP-Endo Shaper) [7]. In the present study, in an attempt to replicate the real anatomical condition, a double-curved tooth model that was 23 mm long was employed.…”

“…In fact, in endodontic files, the low resistance to buckling can produce elastic deformations that are able to prevent their advancements into the apical canal [6]. From the few available studies, it appears to be clear how this phenomenon affects both glide path and shaping files [7]. The elastic or plastic deformation of a pathfinder, a consequence of a low resistance to buckling, has a relevant impact on negotiation since it might hamper the apical progression of the instrument toward the canal terminus.…”