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Article

Micro-Computed Tomography Evaluation of Minimally Invasive Shaping Systems in Mandibular First Molars

by
Elio Berutti
,
Edoardo Moccia
,
Stefano Lavino
,
Stefania Multari
,
Giorgia Carpegna
,
Nicola Scotti
,
Damiano Pasqualini
and
Mario Alovisi
*
Department of Surgical Sciences, Dental School, University of Turin, 10125 Turin, Italy
*
Author to whom correspondence should be addressed.
J. Clin. Med. 2022, 11(15), 4607; https://doi.org/10.3390/jcm11154607
Submission received: 17 July 2022 / Revised: 3 August 2022 / Accepted: 4 August 2022 / Published: 8 August 2022
(This article belongs to the Special Issue The State of the Art in Endodontics—Part II)
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Abstract

The aim of this study was to compare the shaping ability of a modified ProTaper Next technique (PTNm) with that of TruNatomy (TN) in lower molars mesial curved canals using micro-computed tomography (Micro-CT). Sixty mesial canals of first mandibular molars were randomly assigned between two groups (n = 30). After canal scouting with K-File #10, glide path and shaping were carried out with TN or PTNm systems. The PTNm sequence consists of ProGlider, followed by ProTaper Next X1 and apical finishing with NiTiFlex #25 up to working length (WL) to ensure adequate apical cleaning. Samples were scanned using micro-CT and pre- and post-shaping volumes were matched to analyse geometric parameters: the volume of removed dentin; the difference of canal surface; centroid shift, minimum and maximum root canal diameters; cross-sectional areas; the ratio of diameter ratios (RDR) and the ratio of cross-sectional areas (RA). Measurements were assessed 2 mm from the apex and in relation to the middle and coronal root canal thirds. Data were analysed using ANOVA (p < 0.05). No statistically significant differences were found between the groups for any parameter at each level of analysis, except for RA at the coronal level (p = 0.037). The PTNm system showed the tendency to enlarge more in the coronal portion with a lower centroid shift at apical level compared with TN sequence (p > 0.05). Both PTNm and TN sequences demonstrated similar maintenance of original anatomy during the shaping of lower molar mesial curved canals.
Keywords: microtomography; molar; root canal therapy; dental pulp cavity; mechanical preparation; rotary instruments microtomography; molar; root canal therapy; dental pulp cavity; mechanical preparation; rotary instruments

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MDPI and ACS Style

Berutti, E.; Moccia, E.; Lavino, S.; Multari, S.; Carpegna, G.; Scotti, N.; Pasqualini, D.; Alovisi, M. Micro-Computed Tomography Evaluation of Minimally Invasive Shaping Systems in Mandibular First Molars. J. Clin. Med. 2022, 11, 4607. https://doi.org/10.3390/jcm11154607

AMA Style

Berutti E, Moccia E, Lavino S, Multari S, Carpegna G, Scotti N, Pasqualini D, Alovisi M. Micro-Computed Tomography Evaluation of Minimally Invasive Shaping Systems in Mandibular First Molars. Journal of Clinical Medicine. 2022; 11(15):4607. https://doi.org/10.3390/jcm11154607

Chicago/Turabian Style

Berutti, Elio, Edoardo Moccia, Stefano Lavino, Stefania Multari, Giorgia Carpegna, Nicola Scotti, Damiano Pasqualini, and Mario Alovisi. 2022. "Micro-Computed Tomography Evaluation of Minimally Invasive Shaping Systems in Mandibular First Molars" Journal of Clinical Medicine 11, no. 15: 4607. https://doi.org/10.3390/jcm11154607

APA Style

Berutti, E., Moccia, E., Lavino, S., Multari, S., Carpegna, G., Scotti, N., Pasqualini, D., & Alovisi, M. (2022). Micro-Computed Tomography Evaluation of Minimally Invasive Shaping Systems in Mandibular First Molars. Journal of Clinical Medicine, 11(15), 4607. https://doi.org/10.3390/jcm11154607

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