天鹅型记忆加压接骨器记忆生物力学特性检测

背景:通过记忆生物力学计算和实验测定,分析肱骨骨折和近关节部位天鹅型记忆接骨器的记忆生物力学特性。目的:通过对天鹅型记忆加压接骨器进行力学测定,分析相关记忆生物力学意义。设计:理论计算和实验测定,互为补充,互为验证。单位:解放军第二军医大学附属长海医院骨科和同济大学生命科学与生物工程学院。材料:实验于2001-01/2003-05在解放军第二军医大学长海医院骨科实验室和同济大学生命科学与生物工程学院实验室完成。选择死于颅脑损伤的成年男性肱骨20根。方法:分别选取成人尸体湿肱骨,制作骨折模型,包绕压敏胶片后以天鹅型记忆接骨器固定,测定加压支和环抱支固定骨折时的应力值。主要观察指标:①环抱支的压力测量结果。②加压支的测量结果。结果:天鹅型记忆接骨器环抱支与肱骨接触部位的应力范围是2.42～22.68N,而加压支在骨折断面产生的应力较大,应力为13.6MPa左右。结论:天鹅型记忆接骨器的环抱支应力有利于固定骨折两断端,加压支在骨折断面形成的应力场有利于骨折的愈合。

Biomechanical feature measurement of Swan-like memory compression connector

BACKGROUND: The biomechanical features of Swan-like memory compression connector designed for fractures in hemerus or the parts adjacent to joints are analyzed through biomechanical calculation and experimental measurements.OBJECTIVE: To analyze the relative memory biomechanieal significance through biomechanical measurement of Swan-like memory compression connectorDESIGN: Both biomechanieal calculation and the experimental measurement were conducted for mutual supplementation and confirmation SETTING: The Orthopaedic Department of Changhai Hospital Affiliated to Second Military Medical University of Chinese PLA and the Life Science and Tissue Engineering Institute of Tongji University MATERIALS: This experiment was conducted at the laboratory of Orthopaedic Department of Changhai Hospital Affiliated to Second Military Medical University of Chinese PLA and the Life Science and Tissue Engineering Institute of Tongji University between January 2001 and May 2003.Totally 20 hemerus from adult males who died of craniocerebral injury were chosen.METHODS: Humid hemerus from the adult corpse was chosen to prepare fracture. Encircling the prescale followed by fixation of Swan-like memory compression connector, then we measured the stress produced by compression part and encircle part at fixing the fracture.MAIN OUTCOME MEASURES: ①The stress of holding part; ② the stress of the compression part RESULTS: The stress range of holding part contacting with humerus was 2.42-22.68 N, and the stress in the fracture face, which was produced by compression part, was about 13.6 Mpa.CONCLUSION: The stress of holding part of Swan-like memory compression connector is useful in fixing the fracture parts of humerus, and the stress of compression part is suitable for the healing of fracture.