Simulated Evaluation of Tooth Fracture Resistance During Instrumentation with Single-and Multi-file Rotary Systems

Overview

Journal Iran Endod J

Date 2023 Jan 27

PMID 36704781

Authors

Mostafa Godiny

Seyed Kamal Jalali

Atefeh Khavid

Ali Fatahy

Affiliations

Soon will be listed here.

Abstract

Introduction: Use of rotary files in root canal preparation is inevitable due to their high speed and reduced duration of treatment. However, microcracks and even root fracture may sometimes occur in teeth where canal(s) is/are prepared using these devices. The purpose of the current study was to compare NeoNiti single-file with RaCe multi-file rotary systems.

Materials And Methods: An accurate scanner designed detailed three-dimensional file models, and a simulated model was developed using canal-specific features; including dentin thickness, root canal length, taper rate and root canal curvature. Cleaning and shaping conditions were simulated with appropriate speed and crack conditions for both types of files on the computer. Strain accumulation sites in the root dentin wall where microcracks was likely to occur were simulated and investigated. Abaqus and ANSYS software were used to perform finite element simulations.

Results: RaCe files with 0.04 taper caused the lowest level of stress (34.33 MPa) to the simulated canal. Conversely, the highest level of stress (62.35 MPa) was applied by 8% NeoNiti file to the simulated canal.

Conclusions: Based on the present experimental study, it can be concluded that RaCe multi-file rotary system may better be used in endodontic therapy, and the risk of microcracks in the tooth wall is less than that of NeoNiti single-file rotary system.

Citing Articles

Assessment of Periodontitis Risk Factors in Endodontically Treated Teeth: A Cross-Sectional Study.

Salceanu M, Dascalu C, Melian A, Giuroiu C, Antohi C, Concita C Diagnostics (Basel). 2024; 14(17).

PMID: 39272756 PMC: 11394269. DOI: 10.3390/diagnostics14171972.

Evaluation of Canal Transportation and Centering Ability of RaCe and Af f-one Systems by Cone-beam Computed Tomography: An Study.

Mokhtari H, Razi S, Rahimi S, Haghighat P, Abedi A, Behrouzpour E Iran Endod J. 2024; 19(3):193-198.

PMID: 39086710 PMC: 11287041. DOI: 10.22037/iej.v19i3.41837.

References

Eken R, Genc Sen O, Eskitascioglu G, Belli S . Evaluation of the Effect of Rotary Systems on Stresses in a New Testing Model Using a 3-Dimensional Printed Simulated Resin Root with an Oval-shaped Canal: A Finite Element Analysis Study. J Endod. 2016; 42(8):1273-8. DOI: 10.1016/j.joen.2016.05.007. View

Lopes H, Elias C, Vieira M, Vieira V, de Souza L, Dos Santos A . Influence of Surface Roughness on the Fatigue Life of Nickel-Titanium Rotary Endodontic Instruments. J Endod. 2016; 42(6):965-8. DOI: 10.1016/j.joen.2016.03.001. View

Ferraz C, Gomes N, Gomes B, Zaia A, Teixeira F, Souza-Filho F . Apical extrusion of debris and irrigants using two hand and three engine-driven instrumentation techniques. Int Endod J. 2001; 34(5):354-8. DOI: 10.1046/j.1365-2591.2001.00394.x. View

Yared G . Canal preparation using only one Ni-Ti rotary instrument: preliminary observations. Int Endod J. 2007; 41(4):339-44. DOI: 10.1111/j.1365-2591.2007.01351.x. View

You S, Bae K, Baek S, Kum K, Shon W, Lee W . Lifespan of one nickel-titanium rotary file with reciprocating motion in curved root canals. J Endod. 2010; 36(12):1991-4. DOI: 10.1016/j.joen.2010.08.040. View

Shemesh H, Roeleveld A, Wesselink P, Wu M . Damage to root dentin during retreatment procedures. J Endod. 2010; 37(1):63-6. DOI: 10.1016/j.joen.2010.10.002. View

Burklein S, Hinschitza K, Dammaschke T, Schafer E . Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper. Int Endod J. 2011; 45(5):449-61. DOI: 10.1111/j.1365-2591.2011.01996.x. View

Vadhana S, Saravanakarthikeyan B, Nandini S, Velmurugan N . Cyclic fatigue resistance of RaCe and Mtwo rotary files in continuous rotation and reciprocating motion. J Endod. 2014; 40(7):995-9. DOI: 10.1016/j.joen.2013.12.010. View

Wilcox L, Roskelley C, Sutton T . The relationship of root canal enlargement to finger-spreader induced vertical root fracture. J Endod. 1997; 23(8):533-4. DOI: 10.1016/S0099-2399(97)80316-0. View

10.

Kim H, Lee M, Yum J, Versluis A, Lee C, Kim B . Potential relationship between design of nickel-titanium rotary instruments and vertical root fracture. J Endod. 2010; 36(7):1195-9. DOI: 10.1016/j.joen.2010.02.010. View

11.

Moazzami F, Khojastepour L, Nabavizadeh M, Habashi M . Cone-Beam Computed Tomography Assessment of Root Canal Transportation by Neoniti and Reciproc Single-File Systems. Iran Endod J. 2016; 11(2):96-100. PMC: 4841342. DOI: 10.7508/iej.2016.02.004. View

12.

Cicek E, Kocak M, Saglam B, Kocak S . Evaluation of microcrack formation in root canals after instrumentation with different NiTi rotary file systems: a scanning electron microscopy study. Scanning. 2014; 37(1):49-53. DOI: 10.1002/sca.21178. View

13.

Ashwinkumar V, Krithikadatta J, Surendran S, Velmurugan N . Effect of reciprocating file motion on microcrack formation in root canals: an SEM study. Int Endod J. 2013; 47(7):622-7. DOI: 10.1111/iej.12197. View

14.

Harandi A, Mirzaeerad S, Mehrabani M, Mahmoudi E, Bijani A . Incidence of Dentinal Crack after Root Canal Preparation by ProTaper Universal, Neolix and SafeSider Systems. Iran Endod J. 2017; 12(4):432-438. PMC: 5722122. DOI: 10.22037/iej.v12i4.17597. View

15.

Walia H, Brantley W, Gerstein H . An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod. 1988; 14(7):346-51. DOI: 10.1016/s0099-2399(88)80196-1. View

16.

Kim H, Kim H, Lee C, Kim B, Park J, Versluis A . Mechanical response of nickel-titanium instruments with different cross-sectional designs during shaping of simulated curved canals. Int Endod J. 2009; 42(7):593-602. DOI: 10.1111/j.1365-2591.2009.01553.x. View

17.

Schilder H . Cleaning and shaping the root canal. Dent Clin North Am. 1974; 18(2):269-96. View

18.

Alapati S, Brantley W, Svec T, Powers J, Mitchell J . Scanning electron microscope observations of new and used nickel-titanium rotary files. J Endod. 2003; 29(10):667-9. DOI: 10.1097/00004770-200310000-00014. View

19.

Madani Z, Soleymani A, Bagheri T, Moudi E, Bijani A, Rakhshan V . Transportation and Centering Ability of Neoniti and ProTaper Instruments; A CBCT Assessment. Iran Endod J. 2017; 12(1):43-49. PMC: 5282378. DOI: 10.22037/iej.2017.09. View

20.

Vaudt J, Bitter K, Neumann K, Kielbassa A . Ex vivo study on root canal instrumentation of two rotary nickel-titanium systems in comparison to stainless steel hand instruments. Int Endod J. 2009; 42(1):22-33. DOI: 10.1111/j.1365-2591.2008.01489.x. View