Evaluating in-Vitro Performance of Novel Nickel-Titanium Rotary System (TruNatomy) based on debris extrusion and preparation time from Severely Curved Canals

Mustafa, Ruba, Al Omari, Taher, Al-Nasrawi, Suhad, Al Fodeh, Rami, Dkmak, Alaa and Haider, Julfikar ORCID: https://orcid.org/0000-0001-7010-8285 (2021) Evaluating in-Vitro Performance of Novel Nickel-Titanium Rotary System (TruNatomy) based on debris extrusion and preparation time from Severely Curved Canals. Journal of Endodontics, 47 (6). pp. 976-981. ISSN 0099-2399

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Abstract

Introduction: This laboratory-based study aimed to investigate the quantitative amount of apically extruded debris from severely curved root canals and preparation time for the novel rotary system, TruNatomy (TN), compared to Reciproc Blue (RCB), HyFlex (HCM, HEDM) and ProTaper Next (PTN) rotary systems. Methods: One hundred mandibular molar human teeth with sever curvature of the mesiobuccal canal (25º- 45º) were included in the present study. The specimens were randomly distributed in balanced five groups (n=20): TN, RCB, HCM, PTN, and HEDM. The amount of extruded debris for each group during instrumentation at body temperature was collected in an Eppendorf tube. After desiccation, the mean debris weights for each group were calculated. The total preparation time for each group was also recorded. Data were statistically analysed using the Kruskal–Wallis test at a significance level of P < 0.05. Results: HCM and HEDM groups extruded a significantly higher amount of debris than the other tested groups (P < 0.001). TN extruded the least amount of debris, but it was not significantly different compared to the RCB and PTN groups (P > 0.05). In terms of preparation time, the TN group did not show any significant difference compared to the other groups. Conclusions: All instrumentation systems extruded debris. The TN was among the groups that produced the lowest amount of apically extruded debris that is probable clinically acceptable, since it is equitable to two popular systems and statistically significantly less than two other popular systems studied.