摘要
目的 利用有限元方法研究对侧骨盆环稳定性对动力化前路方形区钛板螺钉系统（DAPSQ）治疗前柱伴后半横行髋臼骨折的生物力学稳定性的影响.方法 运用有限元分析方法构建右侧高位前柱伴后半横行髋臼骨折的全骨盆模型,对右侧髋臼骨折采用DAPSQ固定,分别构建出3组内固定模型：对侧骨盆环完整（A）、对侧耻骨上下支骨折内固定（B）及对侧耻骨上下支骨折未固定（C）,模似坐位加载600 N生理载荷,比较各组右侧骨折端的位移及应力分布情况.结果 A、B、C3组内固定模型臼顶纵向位移差异无统计学意义（P＞0.05）;后柱内壁横向位移分别为（0.903±0.034）、（0.910 ±0.038）、（1.117 ±0.380） mm,DASPQ方形区处螺钉所受应力表现为A＞B＞C,差异有统计学意义（P＜0.05）.结论 DASPQ固定前柱伴后半横行髋臼骨折时,在对侧骨盆环稳定的前提下可以提供较好的生物力学稳定性.
Objective To study the influence of sitting position in anterior column with the hemi-transverse fractures of the acetabulum fixed by dynamic anterior plate-screw system for quadrilateral area （DAPSQ） which caused by the the stability of the contralateral pelvic ring.Methods Using the finite element analysis method to build the pelvis model of right high anterior column with posterior hemi-transverse lesion fractures of the acetabulum,and fixing the right side of the acetabulum fractures by DAPSQ,we construct three sets of internal fixation models individually：keep the contralateral pelvic ring in its integrity （A）,complete for superior and inferior ramus of pubis fracture internal fixation （B） and keep the contralateral superior and inferior ramus of pubis fractures unfixed ？,finally contract the displacement and stress distribution on the right side of the fracture between groups under load 600 N of physiological load imitating sitting position.Results It has no significant sense in the differences of longitudinal displacement of the dome region of acetabulum between the three internal fixation models of group A,group B and group C.The lateral displacements of posterior column inner lining were （0.903 ± 0.034）,（0.910 ±0.038）,（1.117 ±0.380） mm,the force on DASPQ square area screw shows that A 〉 B 〉 C and the differences are significant.Conclusion The biomechanical stability of anterior column with posterior hemi-transverse fractures of acetabulum fixed by DAPSQ is well,under the premise that the contralateral pelvic ring is stable.
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2015年第4期858-860,共3页
Chinese Journal of Experimental Surgery
基金
湖北省自然科学基金资助项目（2013CFA062）
关键词
骨盆
髋臼
骨折
生物力学
内固定
有限元分析
Pelvis
Acetabulum
Fracture
Biomechanics
Internal fixation
Finite element analysis
