THE USAGE OF FEA (FINITE ELEMENT ANALYSIS) IN SHAPING WITH ENDODONTIC INSTRUMENTS: REVIEW
Keywords:
FEA (Finite Element Analysis), endodontic instruments, torqueAbstract
The performances of endodontic instruments are improving with the advancement of them. This advancement is because of the composition and material of which the endodontic instruments are made. Today, there are made Ni Ti instruments, to improve the metallurgical properties and to have better elasticity and flexibility than classic stainless still endodontic instruments. In addition, rotary and reciproc instruments are especially important, beside manual endodontic instruments. In order to function successfully, they need to have adequate torque. Finite Element Analysis is used for stress access in different areas. Today, the FEA is widely used in dentistry to detect the torque generation of rotary instruments. FEA can simulate the torque distribution and is an engineering method for numerical analysis. There are, several computer software programs, that works with FEA and they have 3D views of relevant data for analysis. The benefits of FEA are: precise modeling of instruments with all the characteristic design details and precise modeling of the complicated geometry of the anatomical-morphological characteristic of the teeth, including the root with the canal system, as well as coronary morphological characteristics. FEA can be used to show pressure transfer, to see the places of load as well as the places of tooth fracture and shows the places of instruments fracture. FEA, also, provides the opportunity for setting the torque in rotary and reciproc endodontic instruments. Torque is one of the parameters that shows the generation of stress during root canal shaping. Several studies have shown tooth cracks due to NiTi instruments shaping, depending of different speed and torque setting. Therefore, every time, a new endodontic instrument enters the dental market, research using multiple fields is required. At the same time, it is necessary to include as much as possible all the ways of research to complete the picture, to get more information about the endodontic instrument and to get the clear understanding of the way of working. As well as the advantages and disadvantages of using the endodontic instruments.
References
Ahamed, S.B.B., Vanajassun, P.P., Rajkumar, K., & Mahalaxmi, S. (2018). Evaluation of stress distribution in experimentally designed nickel-titanium rotary files with varying cross sections: A Finite Element Analysis. J. Endod. 44, 654–658. [CrossRef]
Baek, S.H., Lee, C.J., Versluis, A., Kim, B.M., Lee, W., & Kim, H.C. (2011). Comparison of torsional stiffness of nickel-titanium rotary files with different geometric characteristics. J. Endod. 37, 1283–1286. [CrossRef]
Berutti, E., Negro, A.R., Lendini, M., & Pasqualini, D. (2004). Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments. J. Endod. 30, 228–230. [CrossRef]
Blum, J.Y., Machtou, P., Ruddle, C., & Micallef, J.P. (2003). Analysis of mechanical preparations in extracted teeth using ProTaper rotary instruments: Value of the safety quotient. J. Endod. 29, 567–575. [CrossRef]
Chien, P.Y., Walsh, L.J., & Peters, O.A. (2021). Finite Element Analysis of rotary nickel-titanium endodontic instruments: A critical review of the methodology. Eur. J. Oral Sci. 129, e12802. [CrossRef]
Htun, P.H., Ebihara, A., Maki, K., Kimura, S., Nishijo, M., Tokita, D., & Okiji, T. (2020). Comparison of torque, force generation and canal shaping ability between manual and nickel-titanium glide path instruments in rotary and optimum glide path motion. Odontology 108, 188–193. [CrossRef]
International Organization for Standardization. ISO 3630-1. Dental Root-Canal Instruments: Files, Reamers, Barbed Broaches, Rasps, Paste Carriers, Explorers and Cotton Broaches; ISO: Geneva, Switzerland, 1992.
Jiang, W., Bo, H., Yongchun, G., & LongXing, N. (2010). Stress distribution in molars restored with inlays or onlays with or without endodontic treatment: a three-dimensional finite element analysis. J Prosthet Dent. Jan;103(1):6-12. doi: 10.1016/S0022-3913(09)60206-7. PMID: 20105674.
Kane, T.R., & Levinson, D.A. (1985). Dynamics, Theory and Applications; McGraw Hill: New York, NY, USA, pp. 90–99, ISBN 0070378460.
Kim, H.C., Lee, M.H., Yum, J., Versluis, A., Lee, C.J., & Kim, B.M. (2010). Potential relationship between design of nickel-titanium rotary instruments and vertical root fracture. J. Endod. 36, 1195–1199. [CrossRef]
Kim, H.C., Kim, H.J., Lee, C.J., Kim, B.M., Park, J.K., & Versluis, A. (2009). Mechanical response of nickel-titanium instruments with different cross-sectional designs during shaping of simulated curved canals. Int. Endod. J., 42, 593–602. [CrossRef]
Kwak, S.W., Abu-Tahun, I.H., Ha, J.H., & Kim, H.C. (2021). Torsional resistance of WaveOne Gold and Reciproc Blue according to the loading methods. J. Endod. 47, 88–93. [CrossRef]
Kwak, S.W., Shen, Y., Liu, H., Kim, H.C., & Haapasalo, M. (2022). Torque Generation of the Endodontic Instruments: A Narrative Review. Materials (Basel). Jan 17;15(2):664. doi: 10.3390/ma15020664. PMID: 35057383; PMCID: PMC8778851.
Kyaw, M.S., Ebihara, A., Kasuga, Y., Maki, K., Kimura, S., Htun, P.H., Nakatsukasa, T., & Okiji, T. (2021). Influence of rotational speed on torque/force generation and shaping ability during root canal instrumentation of extracted teeth with continuous rotation and optimum torque reverse motion. Int Endod J. Sep;54(9):1614-1622. doi: 10.1111/iej.13485. Epub 2021 Jul 12. PMID: 33527449.
PradeepKumar, A.R., Shemesh, H., Archana, D., Versiani, M.A., Sousa-Neto, M.D., Leoni, G.B., Silva-Sousa, Y.T.C., & Kishen, A. (2019). Root canal preparation does not induce dentinal microcracks in vivo. J. Endod. 45, 1258–1264. [CrossRef]
Prados-Privado, M., Rojo, R., Ivorra, C., & Prados-Frutos, J.C. (2019). Finite element analysis comparing WaveOne, WaveOne Gold, Reciproc and Reciproc Blue responses with bending and torsion tests. J. Mech. Behav. Biomed. Mater. 90, 165–172. [CrossRef] [PubMed]
Rodrigues, M.P., Soares, P.B.F., Gomes, M.A.B., Pereira, R.A., Tantbirojn, D., Versluis, A., & Soares, C.J. (2020). Direct resin composite restoration of endodontically-treated permanent molars in adolescents: bite force and patient-specific finite element analysis. J Appl Oral Sci. 2020;28:e20190544. doi: 10.1590/1678-7757-2019-0544. Epub Apr 27. PMID: 32348440; PMCID: PMC7185981.
Santos, L.D.A., Bahia, M.G., de Las Casas, E.B., & Buono, V.T. (2013). Comparison of the mechanical behavior between controlled memory and superelastic nickel-titanium files via finite element analysis. J. Endod. 39, 1444–1447. [CrossRef] [PubMed]
Sathorn, C., Palamara, J.E., Palamara, D., & Messer, H.H. (2005). Effect of root canal size and external root surface morphology on fracture susceptibility and pattern: A finite element analysis. J. Endod. 31, 288–292. [CrossRef]
Serway, R.A., & Jewett, J.W., Jr. (2003). Physics for Scientists and Engineers, 6th ed.; Brooks Cole: Pacific Grove, CA, USA,; ISBN 0-534-40842-7.
Yared, G.M., Bou Dagher, F.E., & Machtou, P. (2001). Influence of rotational speed, torque and operator’s proficiency on ProFile failures. Int. Endod. J., 34, 47–53. [CrossRef]