Effects of Continuous Chelation on the Instrumentation of Curved Canals with a Martensitic NiTi File System: An Ex Vivo Micro-CT Evaluation
M. Sobrino1 · F. Foschi2,3 · R. Estévez1 · G. Loroño1 · A. Conde Villar1 · R. Pérez-Alfayate1
Received: April 5, 2022 / Accepted: June 23, 2022
© The Authors, under exclusive license to The Society of The Nippon Dental University 2022
https://pubmed.ncbi.nlm.nih.gov/35798914/
Abstract
This study aimed to evaluate the influence of continuous chelation on apical deviation and centrality in curved canals shaped with a martensitic alloy file system, assessed via micro-CT. Preoperatively, 24 lower molar canals with curvatures of 25°-40° were scanned using micro-CT and divided into two groups based on different irrigation protocols (n = 12). Group 1 was irrigated with NaOCl, while Group 2 was treated with Dual Rinse. All canals were prepared using the VDW.ROTATE system. Postoperative scans were conducted, and evaluations were made at 1, 3, and 5 mm from the apex to determine apical deviation and canal centrality using VG Studio software. Statistical analysis was performed with SPSS software using the non-parametric Mann–Whitney test. No statistically significant differences were found between the two groups in apical deviation or canal centrality at any of the studied levels (p < 0.05).
The use of continuous chelation during canal instrumentation with martensitic alloy files does not result in greater deviation or changes in centralization compared to exclusive NaOCl irrigation. Chelation combined with disinfection during shaping with martensitic NiTi can simplify the irrigation regimen without causing iatrogenic aberrations.
Keywords: Continuous chelation · Curved root canal · Etidronic acid · Micro-CT · Rotate system
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