医疗卫生装备2018，Vol.39Issue(2)：34-36,3.DOI:10.7687/j.issn1003-8868.2018.02.034
一种新型骨折外固定装置的设计和实验验证
Design and experimental study of new type of external fixation device for bone fracture
摘要
Abstract
Objective To design a new type of external fixator for bone fracture and verify its rationality and feasibility. Methods The frame and screw of stainless steel achieved fracture fixation in vitro with a threaded locking structure.At the same time the increasing thickness of body frame, the inclined nail holes and the raised bottoms were designed to greatly enhance the strength and overall stability of body frame.FEM (finite element method),measuring the relative displacement and stress distribution after axial load,was used to verify the rationality of the design.An animal experiment with sheep was used to verify the feasibility of fracture treatment. Results Simulated result of FEM indicated that the biggest relative displacement between the separated bones was 0.04 mm,which was much less than the minimum value 1 mm required for fracture healing.The maximum stresses applied on the frame of the fixator,fixator screw,and bone were 35,26,and 6 MPa, respectively, which was much less than the allowable stress. In the animal experiment, fracture site was fixed firmly after operation and was well cured 3 months later.Conclusion The design of this new device is feasible and it can be used as a new method of fracture treatment.关键词
骨折/外固定装置/有限元分析/应力/愈合Key words
fracture/external fixation device/FEM/stress force/healing分类
医药卫生引用本文复制引用
刘申,梁向党,王歆淏,胡传忠,郭占社,孙赓..一种新型骨折外固定装置的设计和实验验证[J].医疗卫生装备,2018,39(2):34-36,3.基金项目
军队医药卫生科技成果扩试项目(01012604) （01012604）
解放军总医院转化医学项目(2016TM-003) （2016TM-003）
