中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (27): 4375-4379.doi: 10.3969/j.issn.2095-4344.0238

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

三种内固定方式治疗髋臼横行后壁骨折后髋臼接触特性的生物力学比较

兰贺军1,赵振伟2,贾 春1,付久洋3   

  1. 开滦总医院林西医院,1骨科,2普外科,河北省唐山市 063103;3沧州海港医院,河北省沧州市 061299
  • 出版日期:2018-09-28 发布日期:2018-09-28
  • 通讯作者: 兰贺军,开滦总医院林西医院骨科,河北省唐山市 063103
  • 作者简介:兰贺军,男,1981年生,河北省唐山市人,2006年华北煤炭医学院毕业,主治医师,主要从事骨盆髋臼骨折的相关治疗研究。

Biomechanical comparison of acetabular contact characteristics after acetabular transverse posterior wall fractures treated with three kinds of internal fixation  

Lan He-jun1, Zhao Zhen-wei2, Jia Chun1, Fu Jiu-yang3   

  1. 1Department of Orthopedics, Linxi Hospital, Kailuan General Hospital, Tangshan 063103, Hebei Province, China; 2Department of General Surgery, Linxi Hospital, Kailuan General Hospital, Tangshan 063103, Hebei Province, China; 3Haigang Hospital, Cangzhou 061299, Hebei Province, China
  • Online:2018-09-28 Published:2018-09-28
  • Contact: Lan He-jun, Department of Orthopedics, Linxi Hospital, Kailuan General Hospital, Tangshan 063103, Hebei Province, China
  • About author:Lan He-jun, Attending physician, Department of Orthopedics, Linxi Hospital, Kailuan General Hospital, Tangshan 063103, Hebei Province, China

摘要:

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文题释义:
髋臼横行后壁骨折:属于Judet-Letournel分型的复杂髋臼骨折类型之一,该类型的骨折造成严重的头臼不匹配以及髋臼关节面的台阶征,临床治疗需要完全解剖复位髋臼关节面,消除关节面的台阶征以及恢复正常的头臼匹配关系。
锁定钢板:被称为内固定夹板,与普通重建钢板通过钢板与骨面的摩擦力来维持骨折端的稳定性不同,锁定钢板通过钢板与锁定螺钉的锁定作用,从而使骨折端达到角稳定性。
 
摘要
背景:髋臼横行后壁骨折是常见的复杂髋臼骨折类型,目前多采用手术切开复位内固定方法进行治疗,主要内固定装置包括后柱重建钢板、后柱重建钢板联合前柱拉力螺钉及后壁螺钉、后柱锁定重建钢板联合后壁半皮质螺钉等。
目的:通过模拟髋臼横行后壁骨折,利用压敏片技术测量并探讨3种内固定方式固定髋臼横行后壁骨折后,髋臼关节面的应力特性。
方法:12具新鲜成人骨盆标本按随机数字表法分成3组,每组4具。将每组的髋臼成功造模后,按固定方式的不同分成3组。A组进行髋臼后柱重建钢板;B组:髋臼后柱重建钢板联合前柱拉力螺钉、后壁拉力螺钉固定;C组:髋臼后柱锁定重建钢板固定。将制备成“柳叶状”的股骨头压敏片贴于股骨头上,于单足站立位进行轴向载荷实验。分别测量各组髋臼关节面的应力集中面积及峰值应力。
结果与结论:当载荷为600 N时,A组髋臼关节面面积小于B组和C组,而峰值应力值大于B组和C组;B组与C组髋关节面面积以及峰值应力差异无显著性意义(P > 0.05)。说明髋臼横行后壁骨折在进行内固定治疗时,应用后柱重建钢板联合前柱拉力螺钉、后壁螺钉以及锁定重建钢板联合后壁半皮质螺钉可增加髋臼关节面的接触面积,降低固定后髋臼关节面的应力集中。髋臼后柱锁定重建钢板在治疗髋臼横行后壁骨折时的生物力学特性与应用髋臼后柱重建钢板联合前柱拉力螺钉及后壁拉力螺钉固定相当。

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
ORCID: 0000-0003-1136-3977(兰贺军)

关键词: 横行后壁骨折, 内固定, 骨科植入物, 髋臼, 生物力学, 接触面积, 应力集中, 拉力螺钉, 压敏片

Abstract:

BACKGROUND: Acetabular transverse posterior wall fractures are a common type of complex acetabular fracture, and mainly treated by open reduction and internal fixation. The main internal fixation device includes posterior column reconstruction plate, posterior column reconstruction plate combined with anterior column lag

screw and posterior wall screw, posterior column locking reconstruction plate combined with posterior wall semi cortical screw.
OBJECTIVE: To measure and explore the stress characteristics of acetabular articular surface after acetabular transverse posterior wall fractures treated by three kinds of internal fixation methods by pressure-sensitive technique.
METHODS: Totally 12 fresh adult pelvic specimens were divided into 3 groups (n=4) by random number table method according to different fixation methods. Group A: Acetabular posterior column reconstruction plate combined with anterior column tension screw fixation was performed; group B: acetabular posterior column reconstruction plate combined with anterior column tension screw and posterior wall tension screw fixation was conducted; group C: acetabular posterior column locking reconstruction plate fixation was carried out. The femoral head pressure sensitive tablets, which were prepared as “lancet”, were affixed to the femoral head and subjected to axial load test at single stand standing. The stress concentration area and peak stress of the acetabular articular surface were measured in each group.
RESULTS AND CONCLUSION: When the load was 600 N, the stress concentration area of acetabular articular surface in group A was significantly smaller than that in groups B and C. The peak stress value of articular surface of group A was significantly higher than that of group B and group C. There was no significant difference in stress concentration area and peak stress between groups B and C (P > 0.05). These results indicated that during internal fixation for acetabular transverse posterior wall fractures, posterior column reconstructive plate combined with anterior column pull screw, posterior wall screw and locking reconstruction plate combined with posterior wall semi cortical screw can increase the contact area of the acetabular articular surface, and reduce the acetabular stress concentration after fixation. The biomechanical characteristics of posterior acetabular posterior column locking reconstruction plate in the treatment of acetabular transverse posterior wall fractures are identical to that of acetabular posterior column reconstruction plate combined with the anterior column tension screw and posterior wall tension screw fixation.

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

Key words: Acetabulum, Biomechanics, Tissue Engineering

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