Comparison of the Efficacy of NeoNiTi, ProTaper, and Reciproc Files in the Retreatment of Curved Root Canals: a CBCT Assessment

Mamak Adel; Maryam Tofangchiha; Ensiyeh Rashvand; Iman Moutabha; Neda Roohi; Rodolfo Reda; Luca Testarelli

doi:10.15644/asc56/4/2

Comparison of the Efficacy of NeoNiTi, ProTaper, and Reciproc Files in the Retreatment of Curved Root Canals: a CBCT Assessment

Acta Stomatol Croat. 2022 Dec;56(4):351-362. doi: 10.15644/asc56/4/2.

Authors

Mamak Adel¹, Maryam Tofangchiha², Ensiyeh Rashvand³, Iman Moutabha⁴, Neda Roohi⁵, Rodolfo Reda⁶, Luca Testarelli⁶

Affiliations

¹ Department of Endodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
² Department of Oral and Maxillofacial Radiology, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
³ Department of Operative Dentistry, School of Dentistry, Alborz University of Medical Sciences, Karaj, Iran.
⁴ Postgraduate Student, Department of Endodontics, Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran.
⁵ Department of Endodontics, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran.
⁶ Department of Oral and Maxillo-Facial Sciences, La Sapienza University of Rome, Italy.

Abstract

Objective: Effective tools and methods are applied during root canal retreatment to eliminate root canal obturation materials and preserve the initial root canal anatomy. The present study compared the efficacy of Reciproc, Neoniti, ProTaper, and Hedstrom files in the retreatment of curved root canals.

Material and methods: In the present in vitro study, 100 root canals with 25‒45º curvatures were used. After the samples were initially prepared and examined by CBCT, the root canals were obturated with gutta-percha and randomly assigned to four groups (n=25). A retreatment was carried out in each group with NeoNiTi, ProTaper, Reciproc, and Hedstrom files. CBCT examinations were carried out again under the same conditions. The samples were evaluated at 3-, 6-, and 9-mm distances from the apex on the first and the second CBCT image for root canal transportation and remaining gutta-percha in the root canals. The time required for retreating each canal in each sample was recorded. One-way ANOVA and corresponding non-parametric tests were applied for data analysis.

Results: The root canal transportation in the NeoNiTi group was lower than that in the other groups and significantly different from the ProTaper group (P<0.05). There was a remaining gutta-percha after retreatments in all the four groups, which was not statistically significant (P>0.05).

Conclusion: Despite the fact that the NeoNiTi file produced less transportation than other file systems evaluated in the retreatment of curved root canals, all the files were very effective at the clinically acceptable levels.

Keywords: Author Keywords: Cone-Beam Computed Tomography; Endodontic File; MeSH Terms: Dental Instruments; Retreatment; Root Canal; Root Canal Preparation; Transportation; Treatment Outcome.