Effect of different motions on the mechanical behavior of recent NiTi enlarging systems and the stress distribution on curved root canal dentin (Finite Element study)
Manar Mohammed Galal Helmy Hamouda;
Abstract
The aim of this study was to compare and evaluate stress distribution on BioRace, Hyflex, and OneShape files under bending and torsion, and to evaluate the stress distribution in root canals using finite element analysis.
Three NiTi files were scanned using CT and Stereomicroscope. The files FE models were built using Matlab and SoildWorks software. The behavior of the instrument under bending and torsion was analysed mathematically in SolidWorks software package. Each FE model of the files was simulated in continuous rotation and reciprocation motions. This motion was applied for each file model in (30, and 45) degrees angles of curvature, stress distribution on FE models was evaluated mathematically in SolidWorks software package.
A six freshly extracted mandibular molars with mesiobuccal root canals had 45 degrees angle of curvature, radius range (5-7) mm, and working length 17 mm were used. The experimental samples were divided into three equal groups according to the instrument used. Group one was instrumented using BioRace file, while group two was instrumented using HyFlex file. The third group was instrumented using OneShape file. Each file was used in continuous rotation and reciprocation motions. The prepared teeth were CT scanned and finite element models were constructed. Stress distribution on root canals was evaluated mathematically in SolidWorks software package.
The result showed that under bending conditions the maximum stress value was found on OneShape file, followed by HyFlex file, then BioRace file. While, under torsion the maximum stress value was related to BioRace file, followed by HyFlex file, then OneShape file.
Three NiTi files were scanned using CT and Stereomicroscope. The files FE models were built using Matlab and SoildWorks software. The behavior of the instrument under bending and torsion was analysed mathematically in SolidWorks software package. Each FE model of the files was simulated in continuous rotation and reciprocation motions. This motion was applied for each file model in (30, and 45) degrees angles of curvature, stress distribution on FE models was evaluated mathematically in SolidWorks software package.
A six freshly extracted mandibular molars with mesiobuccal root canals had 45 degrees angle of curvature, radius range (5-7) mm, and working length 17 mm were used. The experimental samples were divided into three equal groups according to the instrument used. Group one was instrumented using BioRace file, while group two was instrumented using HyFlex file. The third group was instrumented using OneShape file. Each file was used in continuous rotation and reciprocation motions. The prepared teeth were CT scanned and finite element models were constructed. Stress distribution on root canals was evaluated mathematically in SolidWorks software package.
The result showed that under bending conditions the maximum stress value was found on OneShape file, followed by HyFlex file, then BioRace file. While, under torsion the maximum stress value was related to BioRace file, followed by HyFlex file, then OneShape file.
Other data
| Title | Effect of different motions on the mechanical behavior of recent NiTi enlarging systems and the stress distribution on curved root canal dentin (Finite Element study) | Other Titles | تأثير الأنواع المختلفة من الحركة على السلوك الميكانيكي لأنظمة التوسيع الحديثة المصنوعة من النيكل تيتانيوم و توزيع الجهد على عاج القنوات الجذرية المنحنية (دراسة بطريقة العناصر المحددة) | Authors | Manar Mohammed Galal Helmy Hamouda | Issue Date | 2015 |
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