摘要
目的建立鼻中隔偏曲矫正手术前后鼻中隔三维有限元模型,探究鼻中隔偏曲矫正手术对鼻中隔软骨应力的减张效果。方法该研究选取1例于2022年1月在南方医科大学珠江医院治疗的40岁男性鼻中隔偏曲患者,进行鼻内镜下二线减张鼻中隔矫正术,在术前和术后6个月行鼻中隔软骨CT三维重建及有限元分析,采集三维CT的DICOM格式数据,运用Mimics 21.0、Geomagic Studio 2014、ANSYS Workbench 17.0软件建立鼻中隔三维有限元模型。在鼻中隔软骨的顶端与底端设置固定约束,在软骨前端平面设置加载一个压强为106 Pa的沿X轴方向的接触应力,然后进行鼻中隔总形变位移和von Mises应力(VMS)分布的有限元分析。结果(1)鼻中隔偏曲软骨的总形变位移值最高点位于软骨前端,术前总形变位移最大值为0.022296 m,术后为0.108810 m。(2)鼻中隔偏曲软骨的应力分布主要集中于软骨前中段,VMS在鼻中隔前端有一峰值,术前VMS峰值为725000 Pa,术后为2426000 Pa。(3)术后鼻中隔软骨总形变位移和VMS分布曲线从鼻中隔前端至后端有"瀑布样"落差。(4)术前鼻中隔VMS最大分布范围约为0.0032524 m^(2),术后约为0.0004186 m^(2),术后鼻中隔应力分布范围较术前明显减少。结论通过CT三维重建结合有限元分析技术,成功建立了鼻中隔三维有限元模型;通过对比手术前后的总形变位移和VMS曲线,证明鼻中隔偏曲矫正手术对鼻中隔软骨应力有减张效果。
Objective To establish a nasal septum evaluation model before and after nasal septum deviation correction surgery with finite element analysis,to explore the effect of nasal septum cartilage stress reduction after nasal septum deviation correction surgery.Methods In this study,a male adult patient treated in Zhujiang Hospital of Southern Medical University in January 2022 was selected for second-line nasal endoscopic tension-reduction septum correction.Three-dimensional reconstruction and finite element analysis of nasal septum cartilage were performed before surgery and 6 months after surgery,and DICOM format data of three-dimensional CT were collected.Mimics 21.0,Geomagic Studio 2014,and ANSYS Workbench 17.0 software were used to establish a three-dimensional finite element model of the nasal septum,and fixed constraints were set on the top and bottom of the nasal septum cartilage.A contact stress with a pressure of 106 Pa along the X axis was applied in the front plane of the cartilage,and then the finite element analysis of the total deformation displacement and von Mises stress(VMS)distribution of the nasal septum was performed.Results (1)The maximum value of the total deformation displacement of the deviated nasal septum cartilage was located in the front of the cartilage,and the maximum value was 0.022296 m before surgery and 0.108810 m after surgery.(2)The stress distribution of deviated nasal septum cartilage was mainly concentrated in the anterior cartilage,in which VMS had a peak at the anterior end of the nasal septum,and the VMS peak was 725000 Pa before surgery and 2426000 Pa after surgery.(3)The total deformation displacement and VMS value curves of the nasal septum showed a"waterfall"drop from the anterior end of the nasal septum to the posterior end.(4)The maximum distribution range of VMS in the nasal septum was 0.0032524 m^(2) before surgery and 0.0004186 m^(2) after surgery,indicating that the stress distribution range of the nasal septum after surgery was significantly reduced compared with that before surgery.Conclusion The three-dimensional finite element model of nasal septum is established successfully through CT three-dimensional reconstruction and finite element analysis.By comparing the total deformation displacement and VMS curve before and after the operation,this model evidenced that the correction of nasal deviation has the effect of reducing the stress of nasal septum cartilage.
作者
吴东燃
齐向东
Wu Dongran;Qi Xiangdong(Department of Plastic Surgery and Cosmetology,Zhujiang Hospital of Southern Medical University,Guangzhou 510280,China)
出处
《中华整形外科杂志》
CSCD
2023年第8期851-857,共7页
Chinese Journal of Plastic Surgery
关键词
有限元分析
鼻中隔偏曲
CT三维重建
生物力学
Finite element analysis
Deviation of nasal septum
CT three-dimensional reconstruction
Biomechanics
