CAJ | 학술논문

目的模拟空降兵着陆瞬间踝关节由跖屈位到内翻位的变化,测定外侧副韧带及关节囊等软组织损伤时的负荷,并分析其在受力过程中所表现的特性,为研制新式伞兵护踝及伞靴提供理论依据. 方法采用人体踝关节标本6具,通过自制夹具固定在MTS-858生物材料试验机上,施加轴向力,轴向压缩范围10 cm,当负荷曲线出现峰值时停止.记录负荷峰值及达到峰值的时间,绘制负荷-时间曲线. 结果模拟空降兵着陆瞬间踝关节由跖屈位到内翻位试验中,标本踝关节负荷在达到峰值前随时间逐渐增加,达到峰值后迅速下降.负荷峰值约2207.18 N,达到峰值时间约9.76s.当负荷达到峰值时,踝关节外侧副韧带及关节囊主要呈现钝性断裂损伤,断端极不整齐.全部标本经C型臂摄X线片,均无骨性损伤. 结论模拟空降兵跳伞着陆瞬间踝关节由跖屈状态到内翻状态下,外侧副韧带及关节囊纤维组织在负荷-时间曲线中表现出“等长收缩”及“等张收缩”特性.本试验为改进护踝或伞靴设计,以更好地防止外侧副韧带及相关软组织损伤提供了一定的理论依据.
목적 모의공강병착륙순간과관절유척굴위도내번위적변화,측정외측부인대급관절낭등연조직손상시적부하,병분석기재수력과정중소표현적특성,위연제신식산병호과급산화제공이론의거. 방법 채용인체과관절표본6구,통과자제협구고정재MTS-858생물재료시험궤상,시가축향력,축향압축범위10 cm,당부하곡선출현봉치시정지.기록부하봉치급체도봉치적시간,회제부하-시간곡선. 결과 모의공강병착륙순간과관절유척굴위도내번위시험중,표본과관절부하재체도봉치전수시간축점증가,체도봉치후신속하강.부하봉치약2207.18 N,체도봉치시간약9.76s.당부하체도봉치시,과관절외측부인대급관절낭주요정현둔성단렬손상,단단겁불정제.전부표본경C형비섭X선편,균무골성손상. 결론 모의공강병도산착륙순간과관절유척굴상태도내번상태하,외측부인대급관절낭섬유조직재부하-시간곡선중표현출“등장수축”급“등장수축”특성.본시험위개진호과혹산화설계,이경호지방지외측부인대급상관연조직손상제공료일정적이론의거.
Objective To determine the load of causing parachutist's lateral collateral ligament and the joint capsule injuries by investigating the ankle inversion from plantar flexion to varus position under simulated landing state,and to analyze its stress features in order to provide theoretical reference to the development of Chinese Air Force Paratrooper boots and ankle brace.Methods Six human ankle specimens were fixed on the MTS-858 biomechanical testing machine by the self-made fixture.The axial compression range was 10 cm.The axial force was applied until the load curve appeared peak.The force and the time to peak were recorded,as well as the load time curve.Results In the simulation of ankle inversion from plantar flexion to varus position,the average peak force was 2207.18 N,and the average time to the peak was 9.76 s.The load curve showed such feature as gradual increase and sharp drop.The dissection showed that the lateral collateral ligament and the joint capsule had inactive ruptured injuries with irregular section as the peak force applied.X-ray examination indicated no osseous injuries in all specimens.Conclusions The ankle's lateral collateral ligament and joint capsule would show isometric and isotonic contraction features in the load-time curve as overcoming the ankle change from plantar flexion to varus position under simulated landing state.Those would provide theoretical reference in improving paratrooper boots and ankle brace in order to prevent ankle from lateral collateral ligament and the related soft tissue injuries.