| 摘要: |
| 目的：通过建立“一”字型切口、环形切口、纤维环缝合的有限元分析模型，利用有限元分析方法，评估三种纤维环处理方式对于腰椎生物力学的影响。方法：选取健康成人 L4/5 腰椎节段的 CT 的 DICOM 结果，通过逆向建模方式建立人体正常腰椎模型、环形切口模型、“一”字型切口模型及缝合模型，测量腰椎在正常轴向压力的情况下，前屈、后伸、侧弯、旋转四种工况下的生物力学数据。结果：通过有限元分析方法计算正常椎体及三种不同纤维环处理方式的模型的应 力数据，结果显示纤维环切开后，各种工况下纤维环、髓核的最大应力值均较正常模型增加；纤维环缝合后，在前屈后伸 旋转工况下的最大应力，均低于“一”字型切口和环形切口；与未缝合模型相比，纤维环缝合模型的各部分在各种工况下 的应力分布都更加均匀。结论：纤维环缝合后椎间盘、髓核和纤维环应力分布较未缝合模型均匀，缓解纤维环切开后造成 的纤维环应力集中问题，对维持椎间盘的稳定性及防止术后再突出能起到积极作用。 |
| 关键词: 腰椎间盘修复 三维有限元 生物力学 |
| DOI：10.3969/j.issn.1007-6948.2019.04.019 |
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| 基金项目:微创腰间盘手术三种纤维环处理方式的临床及有限元研究（2015B1030） |
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| Three-dimensional Finite Element Analysis on Effects of Three Kinds of Fiber Annulus Treatment Methods on Lumbar Spine Biomechanics |
| LI Yong,PENG Li-yang,CHEN Rong-bin |
| Zhuhai Hospital of Guangdong Provincial Hospital of Traditional Chinese Medicine, Zhuhai (519000), China;Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong Province (Guangzhou 510410) |
| Abstract: |
| Objective To evaluate the effects of three fiber annulus treatments, including horizontal shape incision, annular incision and ?ber annulus suture, on lumbar spine biomechanics by establishing a ?nite element analysis model. Methods The DICOM results of CT of healthy adult L4/ 5 lumbar segments were selected. The normal lumbar vertebrae model, annular incision model, horizontal incision model and suture model were established by reverse modeling. Biomechanical data of lumbar spine under normal axial pressure were measured under four conditions: ?exion, extension, lateral bending and rotation. Results Stress data of normal vertebral body and three different annulus fibrosus models were calculated by finite element method. It could be seen that the maximum stress of the annulus ?brosus and nucleus pulposus in annulus incision models under different conditions were higher than that of the normal model. After the ?ber annulus was sutured, the maximum stress under the ?exion and extension conditions was lower than the horizontal shape incision and the annular incision. Compared with the unsutured model, the different parts of the annulus ?brosus suture model were more average. Conclusion After sutured the annulus fibrosus, the stress distribution of the intervertebral disc, nucleus pulposus and annulus ?brosis is more average than the unsutured models, and the stress of the annulus caused by annulus incision is alleviated, which can positively maintain the stability of the intervertebral disc and prevent disc herniation recurrence. |
| Key words: Lumbar disc suture finite element analysis biomechanics |
