中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (9): 1350-1355.doi: 10.3969/j.issn.2095-4344.2014.09.007

• 脊柱植入物 spinal implant • 上一篇    下一篇

胸腰椎压缩性骨折单椎体内植入器的初步研制及其生物力学

李际才1,刘平均1,贺用礼1,赵卫东2,梁栋柱2,毛炳焱1   

  1. 1长沙医学院附属石门医院骨科,湖南省常德市  415300;2南方医科大学生物力学重点实验室,广东省广州市  510515
  • 出版日期:2014-02-26 发布日期:2014-02-26
  • 通讯作者: 刘平均,硕士,主任医师,教授,长沙医学院附属石门医院骨科,湖南省常德市 415300
  • 作者简介:李际才,男,1970年生,湖南省澧县人,2008年中南大学毕业,硕士,副主任医师,主要从事脊柱疾病的研究。
  • 基金资助:

    湖南省卫生厅科技基金资助项目(B2009134)

Primary development and biomechanics of single vertebrae internal fixation system for thoracolumbar compression fracture

Li Ji-cai1, Liu Ping-jun1, He Yong-li1, Zhao Wei-dong2, Liang Dong-zhu2, Mao Bing-yan1   

  1. 1 Department of Orthopedics, Simen Hospital Affiliated to Changsha Medical School, Changde 415300, Hunan Province, China; 2 Key Laboratory of Biomechanics, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • Online:2014-02-26 Published:2014-02-26
  • Contact: Liu Ping-jun, Master, Chief physician, Professor, Department of Orthopedics, Simen Hospital Affiliated to Changsha Medical School, Changde 415300, Hunan Province, China
  • About author:Li Ji-cai, Master, Associate chief physician, Department of Orthopedics, Simen Hospital Affiliated to Changsha Medical School, Changde 415300, Hunan Province, China
  • Supported by:

    the Science and Technology Project of Hunan Provincial Health Department, No. B2009134

摘要:

背景:对于压缩程度大于1/3的严重胸腰椎压缩性骨折,理想的治疗方法是微创内固定,其具有良好的生物力学性能,且植骨可靠,在达到伤椎复位、植骨与稳定目的的同时,尽可能地保留了脊柱运动单位和正常生理功能,从而减轻临近节段退变。
目的:研制一种内镜下经椎体侧方入路复位单椎体内植入器,评价其应用于胸腰椎压缩性骨折中的生物力学性能。
方法:根据成人胸腰椎椎体的解剖学测量数据研制各型号的单椎体内植入器。选取6具成人新鲜胸腰椎尸体标本,制作L1压缩性骨折模型,分为对照组、骨折损伤组、单椎体内植入器组、AF复位内固定组及前路钢板内固定组,分别进行三维运动范围实验。
结果与结论:生物力学测试表明,单椎体内植入器组在胸腰椎前屈及左右侧屈方向上与AF内固定组及前路钢板组运动范围差异无显著性意义(P > 0.05),但在后伸及左右旋转方向上运动范围增大,差异有显著性意义(P < 0.05)。结果可见单椎体内植入器设计新颖,在前屈及左右侧屈方向具有较好的生物力学性能,但在后伸及旋转方向缺乏稳定性,需加以改进或辅以外固定。


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

关键词: 植入物, 脊柱植入物, 胸腰椎, 骨折, 复位, 内固定, 生物力学

Abstract:

BACKGROUND: For severe thoracolumbar compression fracture (> 1/3 compression), ideal therapeutic method is minimally invasive internal fixation, which has good biomechanical functions. Moreover, bone graft is reliable. Injured vertebra reduction and bone graft stability achieved. Motor unit of spinal column and normal physiological function were retained, resulting in lessening nearby segmental degeneration.
OBJECTIVE: To discuss the design of single vertebrae internal fixation system and evaluate its biomechanical performance which apply to treat thoracolumbar compression fracture by endoscope.
METHODS: A brand-new single vertebrae internal fixation system was designed in accordance with data of anatomic measurement of adult thoracolumbar vertebra. Six fresh adult corpse specimens were prepared to produce models of L1 compression fracture, and assigned to control group, fracture injury group, single vertebrae internal fixation system group, AF reduction internal fixation group and anterior plate internal fixation group. Three-dimensional movement range experiments were conducted separately.
RESULTS AND CONCLUSION: The biomechanical comparison showed that there was no significant difference in three-dimensional range of motion among single vertebrae internal fixation system group (anteflexion, left and right lateroflexion), AF reduction internal fixation group and anterior plate internal fixation group (P > 0.05). However, range of motion significantly increased at backward extension, left and right rotation (P < 0.05). Results suggested that the design of single vertebrae internal fixation system was novel and the system had good biomechanical performance at anteflexion, left and right lateroflexion. However, it needs to be improved in which lacks of stability of extension and rotation.


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

Key words: fractures, compression, perioperative period, internal fixators, biomechanics

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