中国组织工程研究与临床康复2007，Vol.11Issue(25)：5039-5041,3.
两种构型空心加压螺钉固定头颈型股骨颈骨折的生物力学特征
Biomechanical characteristics of two geometric configurations of cannulated compression screws in the fixation of femoral neck fracture
史威 1范婕 2张英泽 3杨搏贵 1贾卫斗 1李素红1
作者信息
- 1. 解放军第二五一医院骨科,河北省张家口市,075000
- 2. 河北北方学院病理教研室,河北省张家口市,075000
- 3. 河北医科大学第三附属医院骨科,河北省石家庄市,050082
- 折叠
摘要
Abstract
BACKGROUND : After femoral neck fracture, incidences of ischemic necrosis and bone non-healing are closely related to biomechanical characteristics of internal fixation devices. Compression stress can improve fracture healing, tension force can delay fracture healing, and shear stress can inhibit fracture healing. How to relieve shear stress and expand compression stress is of significance for theories and clinical applications.OBJECTIVE: To compare the biomechanical characteristics of the two geometric configurations of three cannulated compression screws in the fixation for femoral neck fracture and to provide a theoretical foundation in the treatment of femoral neck fracture.DESIGN : Observational contrast study.SETTING: Department of Orthopaedics, the 251 Hospital of Chinese PLA; Department of Orthopaedics, the Third Hospital, Hebei Medical University.PARTICIPANTS: The experiment was carried out in the Hebei Orthopaedic Institute from November 2002 to March 2003. Five cadavers including 4 males and 1 female with similar bone mineral density (BMD) were provided by Department of Anatomy, Hebei Medical University. X-ray photographs proved that all the cadavers did not have rheumatism, tuberculosis, tumor, fracture or deformity.METHODS: Ten femurs were randomly divided into inverted and upright isosceles triangle with 5 in each group. Femur samples with femoral neck fracture were fixed with three cannulated screws and measured with the biomechanical machine (CSS-44020, made in Changchun Experimental Researching Institute, provided by Hebei Orthopaedics Institute). The compression strength, torsibility and the maximal vertical loading were compared between the two configurations of screws.MAIN OUTCOME MEASURES:①Displacement of femoral head at 600 N and 750 N during torsibility test; ②torque-moment at 2°and 4°during torsibility test;③load during maximal vertical loading test.CONCLUSION: The effect of three cannulated compression screws configured as an inverted isosceles triangle on the treatment of femoral neck fracture is superior to that of three cannulated compression screws as an upright isosceles triangle.关键词
股骨颈骨折/骨折固定术,内/骨钉/生物力学分类
医药卫生引用本文复制引用
史威,范婕,张英泽,杨搏贵,贾卫斗,李素红..两种构型空心加压螺钉固定头颈型股骨颈骨折的生物力学特征[J].中国组织工程研究与临床康复,2007,11(25):5039-5041,3.
