Shaping ability of 2Shape and NeoNiTi rotary instruments in preparation of curved canals using micro-computed tomography

Background: Various systems of nickel-titanium (NiTi) instrument have long been commercially available. However, the preparation of narrow and curved root canals has always been challenging. The purpose of this study was to compare the shaping ability of two NiTi systems (2Shape and NeoNiTi) in seve...

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Veröffentlicht in:BMC oral health 2021-11, Vol.21 (1), p.595-595, Article 595
Hauptverfasser: Faisal, Ibrahim, Saif, Rajab, Alsulaiman, Mona, Natto, Zuhair S.
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Alsulaiman, Mona
Natto, Zuhair S.
description Background: Various systems of nickel-titanium (NiTi) instrument have long been commercially available. However, the preparation of narrow and curved root canals has always been challenging. The purpose of this study was to compare the shaping ability of two NiTi systems (2Shape and NeoNiTi) in severely curved root canals with different morphological patterns using micro-computed tomography (Micro-CT). Methods: A total of 22 human extracted permanent teeth of mandibular first molars, with the exact mesial angle of curvature of 25 and 35 degrees, according to Schneider's technique, were distributed randomly into two groups (group I: 2Shape, group II: NeoNiTi) based on the rotary system used (n = 22). The groups were subdivided into two subgroups corresponding to the angle of canal curvature (25 degrees and 35 degrees) (n = 11). Canals were scanned using Micro-CT pre- and post-preparation to assess the volume of dentin removed; canal transportation; and canal centering ratio at 3, 6, and 9 mm from the apex. The Mann-Whitney U test was utilized to determine any significant differences between the two systems. The level of statistical significance was set at p < 0.05. Results: There was no significant difference between the two groups in volume of dentin removed; canal transportation; and centering ability for 25 degrees and 35 degrees canal curvatures at 3, 6, and 9 mm from the apex (coronal, middle, and apical) thirds (p > 0.05). At the middle third, the NeoNiTi group demonstrated a statistically significant increase in volume of dentin removed for 35 degrees canal curvatures compared to the 2Shape group. Conclusion: Within the limitation of our in vitro study, 2Shape and NeoNiTi systems with severely curved canals were confirmed to be relatively safe in preparation and to respect original canal anatomy. Nevertheless, NeoNiTi instruments produced more centered preparation and minimal canal deviation compared to the 2Shape system.
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However, the preparation of narrow and curved root canals has always been challenging. The purpose of this study was to compare the shaping ability of two NiTi systems (2Shape and NeoNiTi) in severely curved root canals with different morphological patterns using micro-computed tomography (Micro-CT). Methods: A total of 22 human extracted permanent teeth of mandibular first molars, with the exact mesial angle of curvature of 25 and 35 degrees, according to Schneider's technique, were distributed randomly into two groups (group I: 2Shape, group II: NeoNiTi) based on the rotary system used (n = 22). The groups were subdivided into two subgroups corresponding to the angle of canal curvature (25 degrees and 35 degrees) (n = 11). Canals were scanned using Micro-CT pre- and post-preparation to assess the volume of dentin removed; canal transportation; and canal centering ratio at 3, 6, and 9 mm from the apex. The Mann-Whitney U test was utilized to determine any significant differences between the two systems. The level of statistical significance was set at p &lt; 0.05. Results: There was no significant difference between the two groups in volume of dentin removed; canal transportation; and centering ability for 25 degrees and 35 degrees canal curvatures at 3, 6, and 9 mm from the apex (coronal, middle, and apical) thirds (p &gt; 0.05). At the middle third, the NeoNiTi group demonstrated a statistically significant increase in volume of dentin removed for 35 degrees canal curvatures compared to the 2Shape group. Conclusion: Within the limitation of our in vitro study, 2Shape and NeoNiTi systems with severely curved canals were confirmed to be relatively safe in preparation and to respect original canal anatomy. 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The Author(s).</rights><rights>COPYRIGHT 2021 BioMed Central Ltd.</rights><rights>2021. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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The Mann-Whitney U test was utilized to determine any significant differences between the two systems. The level of statistical significance was set at p &lt; 0.05. Results: There was no significant difference between the two groups in volume of dentin removed; canal transportation; and centering ability for 25 degrees and 35 degrees canal curvatures at 3, 6, and 9 mm from the apex (coronal, middle, and apical) thirds (p &gt; 0.05). At the middle third, the NeoNiTi group demonstrated a statistically significant increase in volume of dentin removed for 35 degrees canal curvatures compared to the 2Shape group. Conclusion: Within the limitation of our in vitro study, 2Shape and NeoNiTi systems with severely curved canals were confirmed to be relatively safe in preparation and to respect original canal anatomy. 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However, the preparation of narrow and curved root canals has always been challenging. The purpose of this study was to compare the shaping ability of two NiTi systems (2Shape and NeoNiTi) in severely curved root canals with different morphological patterns using micro-computed tomography (Micro-CT). Methods: A total of 22 human extracted permanent teeth of mandibular first molars, with the exact mesial angle of curvature of 25 and 35 degrees, according to Schneider's technique, were distributed randomly into two groups (group I: 2Shape, group II: NeoNiTi) based on the rotary system used (n = 22). The groups were subdivided into two subgroups corresponding to the angle of canal curvature (25 degrees and 35 degrees) (n = 11). Canals were scanned using Micro-CT pre- and post-preparation to assess the volume of dentin removed; canal transportation; and canal centering ratio at 3, 6, and 9 mm from the apex. The Mann-Whitney U test was utilized to determine any significant differences between the two systems. The level of statistical significance was set at p &lt; 0.05. Results: There was no significant difference between the two groups in volume of dentin removed; canal transportation; and centering ability for 25 degrees and 35 degrees canal curvatures at 3, 6, and 9 mm from the apex (coronal, middle, and apical) thirds (p &gt; 0.05). At the middle third, the NeoNiTi group demonstrated a statistically significant increase in volume of dentin removed for 35 degrees canal curvatures compared to the 2Shape group. Conclusion: Within the limitation of our in vitro study, 2Shape and NeoNiTi systems with severely curved canals were confirmed to be relatively safe in preparation and to respect original canal anatomy. Nevertheless, NeoNiTi instruments produced more centered preparation and minimal canal deviation compared to the 2Shape system.</abstract><cop>LONDON</cop><pub>Springer Nature</pub><pmid>34798874</pmid><doi>10.1186/s12903-021-01961-x</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects Alloys
Analysis
Computed tomography
CT imaging
Dental Alloys
Dental Pulp Cavity - diagnostic imaging
Dentin
Dentistry, Oral Surgery & Medicine
Endodontics
Equipment Design
Extraction
Humans
Life Sciences & Biomedicine
Methods
Molars
Nickel
Nickel alloys
Patient outcomes
Root Canal Preparation
Root canal therapy
Root canals
Science & Technology
Statistical analysis
Teeth
Testing
Titanium
Tomography
X-Ray Microtomography
title Shaping ability of 2Shape and NeoNiTi rotary instruments in preparation of curved canals using micro-computed tomography
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