پیوندهای مفید
آمار
| تعداد نشریات | 7 |
| تعداد شماره‌ها | 404 |
| تعداد مقالات | 5,423 |
| تعداد مشاهده مقاله | 5,526,445 |
| تعداد دریافت فایل اصل مقاله | 5,023,240 |
خواص مطلوب دیسک در مدلهای عددی و تاثیر آن بر رفتار بیومکانیکی ستون فقرات کمری | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 13، دوره 52، شماره 1، فروردین 1399، صفحه 187-202 اصل مقاله (803.68 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2018.13925.5756 | ||
| نویسندگان | ||
| علی اورنگ1؛ مجتبی حقیقی یزدی* 2؛ صادق ناصر خاکی3؛ سعید رضا مهرپور4 | ||
| 1مهندسی مکانیک، دانشگه تهران، تهران، ایران | ||
| 2مهندسی مکانیک، دانشگاه تهران، تهران، ایران | ||
| 3مهندسی پزشکی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران | ||
| 4جراح ستون فقرات، دانشگاه علوم پزشکی تهران، تهران، ایران | ||
| چکیده | ||
| در این پژوهش، مدل سازی المان محدود غیرخطی جهت بررسی پارامتری تاثیر خواص دیسک بر رفتار بیومکانیکی ستون فقرات کمری ارائه شده است. اجزاء این مدل شامل مهره )استخوان قشری و استخوان اسفنجی(، دیسک )هسته، آنالئوس فیبرسوس و فیبرهای کالژن(، صفحات انتهایی و رباط میباشد. پس از اعمال بارگذاری و شرایط مرزی، تحلیل مدل در نرمافزار آباکوس انجام می شود. همچنین آزمایشات تجربی پیشین در زمینه ستون فقرات حاکی از آن است که این عضو رفتار مکانیکی غیر خطی دارد؛ بنابراین برای دستیابی به این رفتار غیر خطی در مدل حاضر، رباط ها و فیبرهای آنالئوس به صورت فنر غیرخطی مدل سازی شده اند. نتایج بدست آمده از مدل حاضر که شامل فشار میان دیسکی و چرخش میان مهرهای است، با داده های آزمایشات تجربی و مطالعات عددی پیشین مقایسه شده است. بررسی نتایج این پژوهش نشان می دهد که با افزایش ضرایب ماده هایپراالستیک تشکیل دهنده دیسک، میزان چرخش میان مهرهای در هر حالت بارگذاری کاهش می یابد. بنایراین با تغییر خواص دیسک در ساخت دیسکهای مصنوعی میتوان محدوده حرکتی ستون فقرات بیماران مختلف را تغییر داد. | ||
| کلیدواژه‌ها | ||
| چرخش میان مهره ای؛ ستون فقرات کمری؛ مدل المان محدود | ||
| عنوان مقاله [English] | ||
| Desired Properties of Disc in Numerical Models and Its Influence on Biomechanical Behavior of Lumbar Spine | ||
| نویسندگان [English] | ||
| ali orang1؛ Mojtaba Haghighi-Yazdi2؛ Sadegh Naserkhaki3؛ Saeed Reza Mehrpour4 | ||
| 1Master of Science, Mechanical Engineering Department , University of Tehran, Tehran, Iran | ||
| 2Assistant Professor,Mechanical Engineering Department, University of Tehran, Tehran, Iran | ||
| 3Assistant Professor, Biomedical Engineering Department, Islamic Azad University, Tehran, Iran | ||
| 4Associate Professor, Tehran University of Medical Sciences, Tehran, Iran | ||
| چکیده [English] | ||
| In this paper, nonlinear finite element modeling has been presented to conduct a parametric study of disc properties on biomechanical behavior of lumbar spine. This model includes vertebrae (cancellous bone and cortical bone), disc (nucleus, annulus fibrosus, and collagen fibers), end plates, and ligaments. 3 dimensions geometry was reconstructed from computed tomography scans of lumber spine. After applying loads (compression, moment and their combinations) and boundary conditions (fixed L5) to the model, finite element analysis was conducted. Experimental tests available in literature indicated that lumbar spine shows a nonlinear mechanical behavior; hence, to consider this nonlinear behavior in this work, ligaments and annulus fibers have been modeled as nonlinear springs. The obtained results of the current study, which include intradiscal pressure and intervertebral rotation, have been compared with previous in-vitro as well as numerical data. The results of this work showed that stiffening the disc leads to decreased intervertebral rotation in different anatomical planes and the intradiscal pressure. | ||
| کلیدواژه‌ها [English] | ||
| Lumbar spine, Finite element model, Intervertebral rotation | ||
|
سایر فایل های مرتبط با مقاله
|
||
| مراجع | ||
|
[1] A. Polikeit, S.J. Ferguson, L.P. Nolte, T.E. Orr, Factors influencing stresses in the lumbar spine after the insertion of intervertebral cages: finite element analysis, European Spine Journal, 12(4) (2003) 413-420. [2] A.R. Tahavvor, P. Zarrin Chang, S. Abadi Iranagh, S. Heidari, Numerical simulation of realistic human lumbar spine model under compressive force, axial rotation and lateral bending loads, Modares Mechanical Engineering, 16(11) (2016) 54-60. [3] A. Rohlmann, S. Neller, L. Claes, G. Bergmann, H.-J. Wilke, Influence of a follower load on intradiscal pressure and intersegmental rotation of the lumbar spine, Spine, 26(24) (2001) E557-E561. [4] S. Naserkhaki, J.L. Jaremko, M. El-Rich, Effects of inter-individual lumbar spine geometry variation on load-sharing: Geometrically personalized Finite Element study, Journal of biomechanics, 49(13) (2016) 2909-2917. [5] S. Naserkhaki, N. Arjmand, A. Shirazi-Adl, F. Farahmand, M. El-Rich, Effects of eight different ligament property datasets on biomechanics of a lumbar L4-L5 finite element model, Journal of Biomechanics, (2017). [6] D. Jakobs, A. Schultz, Material constants for a finite element model of the intervertebral disk with a fiber composite annulus, Journal of biomechanical engineering, 108 (1986) 1. [7] J.R. Meakin, J.E. Reid, D.W. Hukins, Replacing the nucleus pulposus of the intervertebral disc, Clinical Biomechanics, 16(7) (2001) 560-565. [8] V. Goel, B. Monroe, L. Gilbertson, P. Brinckmann, Interlaminar Shear Stresses and Laminae Separation in a Disc: Finite Element Analysis of the L3-L4 Motion Segment Subjected to Axial Compressive Loads, Spine, 20(6) (1995) 689-698. [9] A. Shirazi-Adl, A.M. Ahmed, S.C. Shrivastava, Mechanical response of a lumbar motion segment in axial torque alone and combined with compression, Spine, 11(9) (1986) 914-927. [10] N. Oreskes, K. Shrader-Frechette, K. Belitz, Verification, validation, and confirmation of numerical models in the earth sciences, Science, 263(5147) (1994) 641-646. [11] M. Viceconti, S. Olsen, L.-P. Nolte, K. Burton, Extracting clinically relevant data from finite element simulations, Clinical Biomechanics, 20(5) (2005) 451-454. [12] J.R. Meakin, Replacing the nucleus pulposus of the intervertebral disk: prediction of suitable properties of a replacement material using finite element analysis, Journal of Materials Science: Materials in Medicine, 12(3) (2001) 207-213. [13] A. Rao, G. Dumas, Influence of material properties on the mechanical behaviour of the L5-S1 intervertebral disc in compression: a nonlinear finite element study, Journal of biomedical engineering, 13(2) (1991) 139-151. [14] N. Yoganandan, S. Kumaresan, L. Voo, F. Pintar, Finite element model of the human lower cervical spine: parametric analysis of the C4-C6 unit, Journal of biomechanical engineering, 119(1) (1997) 87-92. [15] J.T.-M. Cheung, M. Zhang, D.H.-K. Chow, Biomechanical responses of the intervertebral joints to static and vibrational loading: a finite element study, Clinical Biomechanics, 18(9) (2003) 790-799. [16] M. Fagan, S. Julian, D. Siddall, A. Mohsen, Patient-specific spine models. Part 1: Finite element analysis of the lumbar intervertebral disc—a material sensitivity study, Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 216(5) (2002) 299-314. [17] A. Rohlmann, T. Zander, H. Schmidt, H.-J. Wilke, G. Bergmann, Analysis of the influence of disc degeneration on the mechanical behaviour of a lumbar motion segment using the finite element method, Journal of biomechanics, 39(13) (2006) 2484-2490. [18] S. Kumaresan, N. Yoganandan, F.A. Pintar, Finite element analysis of the cervical spine: a material property sensitivity study, Clinical Biomechanics, 14(1) (1999) 41-53. [19] T.H. Smit, The mechanical significance of the trabecular bone architecture in a human vertebra, PhD thesis, Technical University of Hamburg-Harburg, (1996). [20] U.M. Ayturk, C.M. Puttlitz, Parametric convergence sensitivity and validation of a finite element model of the human lumbar spine, Computer methods in biomechanics and biomedical engineering, 14(8) (2011) 695-705. [21] M. El-Rich, P.-J. Arnoux, E. Wagnac, C. Brunet, C.-E. Aubin, Finite element investigation of the loading rate effect on the spinal load-sharing changes under impact conditions, Journal of biomechanics, 42(9) (2009) 1252-1262. [22] H. Schmidt, A. Kettler, F. Heuer, U. Simon, L. Claes, H.-J. Wilke, Intradiscal pressure, shear strain, and fiber strain in the intervertebral disc under combined loading, Spine, 32(7) (2007) 748-755. [23] H. Schmidt, F. Heuer, J. Drumm, Z. Klezl, L. Claes, H.-J. Wilke, Application of a calibration method provides more realistic results for a finite element model of a lumbar spinal segment, Clinical biomechanics, 22(4) (2007) 377-384. [24] C. Breau, A. Shirazi-Adl, J. De Guise, Reconstruction of a human ligamentous lumbar spine using CT images—a three-dimensional finite element mesh generation, Annals of biomedical engineering, 19(3) (1991) 291-302. [25] F. Heuer, H. Schmidt, Z. Klezl, L. Claes, H.-J. Wilke, Stepwise reduction of functional spinal structures increase range of motion and change lordosis angle, Journal of biomechanics, 40(2) (2007) 271-280. [26] A. Schultz, D. Warwick, M. Berkson, A. Nachemson, Mechanical properties of human lumbar spine motion segments, J Biomech Eng, 101 (1979) 46-52. [27] A. Rohlmann, L. Bauer, T. Zander, G. Bergmann, H.-J. Wilke, Determination of trunk muscle forces for flexion and extension by using a validated finite element model of the lumbar spine and measured in vivo data, Journal of Biomechanics, 39(6) (2006) 981-989. [28] K. Goto, N. Tajima, E. Chosa, K. Totoribe, S. Kubo, H. Kuroki, T. Arai, Effects of lumbar spinal fusion on the other lumbar intervertebral levels (three-dimensional finite element analysis), Journal of Orthopaedic Science, 8(4) (2003) 577-584. [29] W.M. Park, K. Kim, Y.H. Kim, Effects of degenerated intervertebral discs on intersegmental rotations, intradiscal pressures, and facet joint forces of the whole lumbar spine, Computers in biology and medicine, 43(9) (2013) 1234-1240. [30] S.-L. Shih, C.-L. Liu, L.-Y. Huang, C.-H. Huang, C.-S. Chen, Effects of cord pretension and stiffness of the Dynesys system spacer on the biomechanics of spinal decompression-a finite element study, BMC musculoskeletal disorders, 14(1) (2013) 191. [31] M. Dreischarf, T. Zander, A. Shirazi-Adl, C. Puttlitz, C. Adam, C. Chen, V. Goel, A. Kiapour, Y. Kim, K. Labus, Comparison of eight published static finite element models of the intact lumbar spine: predictive power of models improves when combined together, Journal of biomechanics, 47(8) (2014) 1757-1766. [32] H. Schmidt, F. Heuer, U. Simon, A. Kettler, A. Rohlmann, L. Claes, H.-J. Wilke, Application of a new calibration method for a three-dimensional finite element model of a human lumbar annulus fibrosus, Clinical Biomechanics, 21(4) (2006) 337-344. [33] E. Wagnac, P.-J. Arnoux, A. Garo, M. El-Rich, C.-E. Aubin, Calibration of hyperelastic material properties of the human lumbar intervertebral disc under fast dynamic compressive loads, Journal of biomechanical engineering, 133(10) (2011) 101007. [34] R.W. Fry, T.F. Alamin, L.I. Voronov, L.C. Fielding, A.J. Ghanayem, A. Parikh, G. Carandang, B.W. Mcintosh, R.M. Havey, A.G. Patwardhan, Compressive preload reduces segmental flexion instability after progressive destabilization of the lumbar spine, Spine, 39(2) (2014) E74-E81. [35] S.M. Renner, R.N. Natarajan, A.G. Patwardhan, R.M. Havey, L.I. Voronov, B.Y. Guo, G.B. Andersson, H.S. An, Novel model to analyze the effect of a large compressive follower pre-load on range of motions in a lumbar spine, Journal of Biomechanics, 40(6) (2007) 1326-1332. [36] S. Naserkhaki, J.L. Jaremko, G. Kawchuk, S. Adeeb, M. El-Rich, Investigation of lumbosacral spine anatomical variation effect on load-partitioning under follower load using geometrically personalized finite element model, in: Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), Anonymous, 2014. [37] K. Sato, S. Kikuchi, T. Yonezawa, In vivo intradiscal pressure measurement in healthy individuals and in patients with ongoing back problems, Spine, 24(23) (1999) 2468. [38] H.-J. Wilke, P. Neef, B. Hinz, H. Seidel, L. Claes, Intradiscal pressure together with anthropometric data–a data set for the validation of models, Clinical Biomechanics, 16 (2001) S111-S126. [39] P. Brinckmann, H. Grootenboer, Change of Disc Height, Radial Disc Bulge, and Intradiscal Pressure From Discectomy An in Vitro Investigation on Human Lumbar Discs, Spine, 16(6) (1991) 641-646. [40] A. Schultz, G. Andersson, R. Ortengren, K. Haderspeck, A. Nachemson, Loads on the lumbar spine. Validation of a biomechanical analysis by measurements of intradiscal pressures and myoelectric signals, JBJS, 64(5) (1982) 713-720. [41] S. Naserkhaki, J.L. Jaremko, S. Adeeb, M. El-Rich, On the load-sharing along the ligamentous lumbosacral spine in flexed and extended postures: Finite element study, Journal of biomechanics, 49(6) (2016) 974-982. | ||
|
آمار تعداد مشاهده مقاله: 815 تعداد دریافت فایل اصل مقاله: 739 |
||
