中国组织工程研究与临床康复2008，Vol.12Issue(19)：3783-3785,3.
骨水泥强化正常骨质DHS固定的生物力学研究
Biomechanical evaluation of dynamic hip screw with bone cement augmentation in normal bone
黎宁 1彭阿钦 2聂喜增 1李锋 1赵永涛 1毕靖博 1韩长伶3
作者信息
- 1. 石家庄市第三医院骨科,河北省石家庄市,050011
- 2. 河北医科大学第三医院骨科创伤急救中心,河北省石家庄市,050051
- 3. 河北省骨科研究所,河北省石家庄市,050051
- 折叠
摘要
Abstract
BACKGROUND: Dynamic hip screw (DHS) is a standard internal fixation for intertrochanteric fracture, whereas the patient combined with osteoporosis, cut-out incidence of lag screw is common. The articles in China and abroad indicate bone cement augmentation of DHS to achieve firm fixation. As for normal bone, no reports is published that whether bone cement augmentation is effective.OBJECTIVE: To investigate the biomechanics of DHS with bone cement augmentation for the fixation of intertrochanteric fracture specimen that has a normal bone density.DESIGN, TIME AND SETTING: Bilateral contrast observation study of the same sample was performed in the Laboratory of Biomechanics, Hebei Orthopaedic Research Institute (Shijiazhuang, Hebei Province, China) between March and April In 2005.MATERIALS: Bilateral upper femora from the embalmed male cadaver were provided by Anatomy Department of Hebei Medical University (China). X-ray scan results proved the absence of tuberculosis, anatomical deformity and tumor.METHODS: Twenty-four matched pairs of the upper femora (48 sides) were used to make the specimens of the intertrochanteric fracture of type A2. The right femur specimens were fixed with DHS augmented by bone cement, as the augmentation group (The screw track of femoral neck was expended by curette, and the femoral head facing upwards were injected with 2mL low viscosity bone cement. Then lag screw was wrested to keep the position unchanged till the bone cement coagulated. Placing barrel, compressing through tighten tail screw, and cortical screw fixing side-plate were. followed). And the left femur specimen was fixed with DHS conventional fixation, as the control group. The bending and torsional tests were performed in the two groups.MAIN OUTCOME MEASURES: The maximum load and the maximum torque in the two groupsRESULTS: The maximum load and the maximum torque were (3852.1602±143.6031) N and (15.5+2.6) Nm in the augmentation group, and (3702.9667±133.8601) N and (14.7±3.4) Nm in the control group. There was no significant difference in the biomechanical effects between the two groups (P>0.05).CONCLUSION: The augmenting fixation with bone cement for intertrochanteric fracture specimen has no significant effect on the strength of DHS fixation or on the overall stability of the fractured bone in normal bone density.关键词
股骨/转子间骨折/动力髋/骨水泥/生物力学/生物材料分类
医药卫生引用本文复制引用
黎宁,彭阿钦,聂喜增,李锋,赵永涛,毕靖博,韩长伶..骨水泥强化正常骨质DHS固定的生物力学研究[J].中国组织工程研究与临床康复,2008,12(19):3783-3785,3.
