中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (12): 1810-1814.doi: 10.3969/j.issn.2095-4344.3778

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

不同构型前路双钢板固定B、C型骶髂关节脱位的有限元分析

束  晖1,黄晓微2   

  1. 1南通大学附属丹阳市人民医院,江苏省丹阳市   212300;2苏州大学附属第一人民医院,江苏省苏州市   215000
  • 收稿日期:2020-04-18 修回日期:2020-04-23 接受日期:2020-06-03 出版日期:2021-04-28 发布日期:2020-12-25
  • 通讯作者: 黄晓微,硕士,医师,苏州大学附属第一人民医院,江苏省苏州市 215000
  • 作者简介:束晖,男,1983年生,江苏省丹阳市人,汉族,2018年东南大学医学院毕业,硕士,副主任医师,主要从事创伤和脊柱骨科方面的研究。

Different configurations of anterior double-plate fixation in types B and C of sacroiliac joint dislocation: a finite element analysis

Shu Hui1, Huang Xiaowei2   

  1. 1Danyang People’s Hospital Affiliated to Nantong University, Danyang 212300, Jiangsu Province, China; 2The First People’s Hospital of Soochow University, Suzhou 215000, Jiangsu Province, China
  • Received:2020-04-18 Revised:2020-04-23 Accepted:2020-06-03 Online:2021-04-28 Published:2020-12-25
  • Contact: Shu Hui, Master, Associate chief physician, Danyang People’s Hospital Affiliated to Nantong University, Danyang 212300, Jiangsu Province, China
  • About author:Shu Hui, Master, Associate chief physician, Danyang People’s Hospital Affiliated to Nantong University, Danyang 212300, Jiangsu Province, Chin

摘要:

文题释义:
骶髂关节脱位:骶骼关节因外力而造成关节的微小移动,不能自行复位,且引起疼痛和功能障碍。
有限元分析:利用数学近似的方法对真实物理系统(几何和载荷工况)进行模拟,利用简单而又相互作用的元素(即单元),就可以用有限数量的未知量去逼近无限未知量的真实系统。

背景:高能量暴力会导致骨盆环结构不稳定,手术治疗骨盆损伤的首要目的是尽可能恢复骨盆后环的连续性和稳定性。为了获得解剖复位,可应用前置钢板固定来维持骨盆后环稳定性。
目的:探讨前路双钢板内固定的构型与生物力学稳定性的关系,寻找治疗B型和C型骶髂关节脱位的最佳前路双钢板内固定构型。
方法:建立完整骨盆环的三维有限元模型并进行验证,在完整骨盆模型的基础上建立B型和C型骶髂关节脱位模型,在2种类型的单侧脱位骨盆模型中置入7种不同角度(0°-90°)放置的前路前板。记录并分析比较各种前路钢板构型固定骶髂关节脱位模型的稳定性。
结果与结论:①在0°固定模型中,B型和C型骶髂关节脱位的向下平移量最大,分别为0.96 mm和0.92 mm;75°固定模型,B型和C型的最小向下平移量均为0.18 mm;②同时0°固定模型中,B型和C型骶髂关节脱位的屈曲成角最大,分别为2.05°和1.9°;60°固定模型中,B型和C型骶髂关节脱位的屈曲成角最小均为0.06°;③侧弯成角方面,B型脱位在30°构型固定时侧弯成角最小,为0.01°;C型脱位在45°构型固定时侧弯成角最小,为0.11°;④综合考虑认为前路钢板成角在45°-75°这个范围,固定B型和C型骶髂关节脱位具有较好的稳定性。

https://orcid.org/0000-0003-4081-2874 (束晖) 

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

关键词: 骨, 骨盆环, 骶髂关节, 脱位, 双钢板, 内固定, 生物力学, 有限元分析

Abstract: BACKGROUND: High-energy violence can lead to instability of pelvic ring structure. The primary purpose of surgical treatment of pelvic injury is to restore the continuity and stability of posterior pelvic ring as much as possible. To obtain anatomical reduction, anterior plate fixation can be used to maintain the stability of posterior pelvic ring. 
OBJECTIVE: To investigate the correlation between the configuration of anterior double-plate fixation and the biomechanical stability and to find the optimal configuration for anterior double-plate fixation for the treatment of type B and type C sacroiliac dislocation.
METHODS: A three-dimensional finite element model of the intact pelvic ring was established and validated. Then type B and type C sacroiliac dislocation models were constructed based on the intact pelvic model. Seven kinds of anterior plates with different angular orientation from 0° to 90° were implanted in two types of ipsilateral dislocated pelvic modes. The stability of models of sacroiliac joint dislocation fixed with different anterior plate configurations was recorded and analyzed.  
RESULTS AND CONCLUSION: (1) For type B and C sacroiliac joint dislocation, the maximal translation was 0.96 mm and 0.92 in 0°-fixation models. The minimum translation occurred in 75°-fixation model of 0.18 mm. (2) The maximal flexion was also found in 0°-fixation model of 2.05° in type B and of 1.9° in type C dislocation, and the minimum flexion existed in 60°-fixation model of 0.06°. (3) As for lateral bending, the minimal lateral bending occurred in 30°-fixation model of 0.01° in type B dislocation and in 45°-fixation model with the value of 0.11° in type C dislocation. (4) It is concluded that the angle of anterior double-plate fixation ranging from 45° to 75° demonstrated superior stability in both types B and C sacroiliac dislocation.


Key words: bone, pelvic ring, sacroiliac joint, dislocation, double plate, internal fixation, biomechanics, finite element analysi

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