Chinese Journal of Tissue Engineering Research ›› 2020, Vol. 24 ›› Issue (27): 4291-4296.doi: 10.3969/j.issn.2095-4344.2783
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Liu Jinyu, Ding Yu, Jiang Qiang, Cui Hongpeng, Lu Zhengcao
Received:
2019-12-26
Revised:
2020-01-04
Accepted:
2020-02-12
Online:
2020-09-28
Published:
2020-09-07
Contact:
Ding Yu, MD, Chief physician, Professor, Master’s supervisor, Department of Rehabilitation Medicine, the Sixth Medical Center of PLA General Hospital, Beijing 100048, China
About author:
Liu Jinyu, Physician, Department of Rehabilitation Medicine, the Sixth Medical Center of PLA General Hospital, Beijing 100048, China
Supported by:
CLC Number:
Liu Jinyu, Ding Yu, Jiang Qiang, Cui Hongpeng, Lu Zhengcao. A finite element model of full endoscope lumbar fenestration and biomechanical characteristics[J]. Chinese Journal of Tissue Engineering Research, 2020, 24(27): 4291-4296.
1.4.2 人体脊柱L4-5节段椎间盘三维模型建立 椎间盘由纤维环、髓核和上下终板组成,椎间盘的建立需要在Mimics 20.0和3-matic中共同完成。首先应用Mimics 20.0中draw L4-5节段椎间盘,将L4-5椎体及椎间盘进行布尔操作,得到贴合L4-5椎体的椎间盘。将贴合的椎间盘导入3-matic中,通过Local Smoothing和push & pull命令打磨椎间盘,通过Surface命令创造出上下终板面,通过Wrap及Boolean进行重叠部分的布尔运算得到上下终板结构。髓核的建立通过缩放椎间盘,拖动位置按照实际椎间盘中纤维环和髓核的比例进行,利用终板进行布尔切割建立中间髓核,纤维环主要通过布尔运算建立,最终得到腰椎管狭窄症患者L4-5的椎间盘有限元模型[10-11]。至此,腰椎管狭窄症患者腰椎L4-5的三维实体模型建立工作基本完成,见图3。 "
1.4.4 各种手术模拟的有限元模型建立 在腰椎管狭窄症模型的基础上,应用3-matic模拟3种术后模型:①M1:连接一侧棘突根部及峡部两点,并测量长度,取中点到下关节突尖端。切除部分椎板及内侧1/2关节突,继而连接椎间盘横轴和纵轴切除1/4髓核,建立单侧1/2小关节及1/4髓核切除椎板开窗模型。②M2:连接双侧棘突根部及峡部两点,并测量长度,取中点到下关节突尖端。切除双侧部分椎板及内侧关节突,连接椎间盘髓核横轴和纵轴切除髓核,建立双侧1/2小关节及1/2髓核切除椎板开窗模型。③M3:平行上下终板将一侧关节突完全切除,连接椎间盘髓核横轴和纵轴进行部分髓核切除,建立单侧整体小关节突及1/4髓核切除椎板开窗模型[4],见图5。 "
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