摘要
目的探讨足支撑时相跟腱不同拉力负荷过程中足底前、后部压力分布的变化。方法将6个新鲜足标本置于Bose材料试验机上,保持足标本中立位,调整垂直压力350 N不变,通过砝码分别给予跟腱0～80 kg不同级别(0、100、200、300、400、500、600、700、800 N)的拉力;分别放置两个秤在足底前、后部,记录足底前、后部在不同跟腱提拉力下的压力值。结果在跟腱不同提拉力下,前足底的压力值不断增加,后足底的压力值不断降低,前足底和后足底压力值占整个足底压力值的百分比与跟腱拉力呈线性关系(P<0.01,R2=0.996)。结论本研究模拟了人活体状态下足的支撑时相,探讨了支撑期足底前、后部压力值的变化趋势,为临床上一些由于跟腱收缩紊乱引起足底压力变化而导致的疾病(如糖尿病足底溃疡、跖骨痛)提供理论基础。
Objective To investigate changes in plantar pressure distributions on forefoot and hindfoot region dur- ing the support phase under different Achilles tensile loads. Methods Six fresh frozen human below-knee speci- mens were used and placed on the material testing machine. The ankles were kept in neutral position and the axial load of 350 N was applied on the specimens. Achilles tensile loads varied from 0 kg to 80 kg （0, 100,200,300, 400, 500,600, 700, 800 N）were applied by weights. Two scales were placed under the forefoot and hindfoot re- gion of the specimen, respectively, to record the pressure under the Achilles tensile loads. Results With the In- creasing Achilles tensile force, the pressure on forefoot region was increasing, while the pressure on the hindfoot was decreasing. The percentage of average plantar pressure in forefoot and hindfoot region over the total plantar pressures presented a linear relationship with the Achilles tensile force （ P 〈 0.0], R2 = 0.996）. Conclusions The support phase of foot in vitro was simulated and the plantar pressure distributions on forefoot and hindfoot re- gion was investigated in this paper. The result can provide theoretical evidences for some diseases （such as dia- betic foot ulcers, metatarsalgia） caused by plantar pressure changes due to Achilles tensile contracture in clinic.
出处
《医用生物力学》
EI
CAS
CSCD
北大核心
2012年第3期329-332,共4页
Journal of Medical Biomechanics
基金
国家863资助项目(2012AA02A603)
北京市科技发展计划研发攻关项目(Z090507017709022)
关键词
足底压力
跟腱拉力
支撑时相
生物力学
Plantar pressure
Achilles tensile force
Support phase
Biomechanics
