Pratt D J, Rees P H, Rodgers C
Prosthet Orthot Int. 1986 Apr;10(1):43-5. doi: 10.3109/03093648609103079.
Due to the increase in prescription of insoles to relieve symptoms due to skeletal shocks at heel strike a pilot study was initiated to look at some materials used for this purpose. Five materials were examined (Plastazote, Spenco, Sorbothane, Poron (PPT) and Viscolas) by two methods. The first method used an accelerometer mounted between the teeth of one of the authors (PR) to record skeletal shock. The second method used a force plate to record the shock produced by dropping a ball-bearing onto the insoles from a standard height. The results showed that Plastazote is poor at absorbing shock with Spenco and Sorbothane being quite good. The best insole materials tested were Poron (PPT) and Viscolas with the latter being marginally superior. No account was taken of degradation of the materials in use except that Plastazote worn for 72 hours was also used in the study, this producing the worst results.
由于用于缓解足跟撞击时骨骼冲击症状的鞋垫处方量增加，开展了一项初步研究，以考察用于此目的的一些材料。通过两种方法对五种材料（Plastazote、Spenco、Sorbothane、Poron（PPT）和Viscolas）进行了检测。第一种方法是在其中一位作者（PR）的牙齿之间安装一个加速度计来记录骨骼冲击。第二种方法是使用测力板记录从标准高度将滚珠轴承掉落到鞋垫上所产生的冲击。结果表明，Plastazote吸收冲击的能力较差，而Spenco和Sorbothane表现相当不错。测试的最佳鞋垫材料是Poron（PPT）和Viscolas，后者略胜一筹。除了在研究中还使用了磨损72小时的Plastazote（其产生了最差的结果）之外，未考虑使用中材料的降解情况。
