隐神经营养血管蒂逆行岛状皮瓣的临床应用

目的：探讨隐神经营养血管蒂逆行岛状皮瓣的临床应用．方法：采用隐神经营养血管蒂逆行岛状皮瓣修复小腿前骨外露、足跟部软组织缺损、足趾缺损共11例．结果：皮瓣全部成活，该皮瓣可修复小腿骨外露、足跟骨外露及足趾缺损．结论：该皮瓣是修复小腿及足部软组织缺损的一种较理想的方法．     

Regional plantar foot pressure distributions on high-heeled shoes-shank curve effects

Forefoot pain is common in high-heeled shoe wearers due to the high pressure caused by the center of body mass moving forward and the increased arch height with heel elevation.Sufficient arch support could reduce the high pressure over forefoot.However,too much arch support could lead to abnormal foot alignment and pain over midfoot.Little information is reported on the relationship among plantar arch height,shank curve design and plantar pressure.This study aimed at quantifying the plantar arch height changes at different heel heights and investigating the effect of shank curve on plantar pressure distribution.The plantar arch height increased to(7.6±1.3) mm at heel height of 75 mm.The Chinese standard suggests the depth of last should be 8.5 mm for heel height of 75 mm.When a shank curve with higher depth of last(11 mm) was used,the peak pressure over forefoot further decreased in midstance phase,which might ease the forefoot problems,while the peak pressure over midfoot increased but not exceeded the discomfort pressure thresholds.To achieve a more ideal pressure distribution in high-heeled shoes,a higher than expected depth of last would be suggested that would not cause discomfort over midfoot.     

锥柄麻花钻磨圆尖工艺分析

磨锥柄麻花钻工艺圆尖作为以后各道工序的基准，其磨尖质量好坏将直接影响到钻头的质量和合格率。本文就磨工艺圆尖的夹紧定位、受力和定位误差进行了分析，并对存在的问题提出了改进方案。