A simplified model for the short-below-knee stump.
A simplified model for the short-below-knee stump.
复制标题
膝盖以下残肢的简化模型。
DOI：
10.1016/0021-9290(77)90065-3
复制
发表时间：
1977
影响因子：
2.4
通讯作者：
M. Nissan
中科院分区：
文献类型：
--
作者：
M. Nissan
髌腱关节面（PTB）假体在世界各地使用。假肢装配中的一个主要问题是残肢和接受腔之间的力传递，特别是对于膝下短（SBK）截肢者。力和力矩的理论研究可能有助于改进设计，以获得更好和更适应性更强的假体。在这项工作中，报告了SBK残端理论模型的3种变化的测试。模型的特点是圆形对称，它们足够简单，可以进行计算。在每种情况下提出五个平衡方程，将力和力矩作为几何参数的函数，如胫骨的直径和长度。为了确定和评价几何参数，测量了44个完整的关节或胫骨样本。结果被用作可能的变化范围，并在计算机上求解整个范围的方程。最佳的几何参数（给出最小的力）被发现。结果表明，从临床实践中众所周知的残肢总长度的理论重要性，最佳的理论位置的主要传输区域和腓骨在残肢中的作用。
The Patellar Tendon Bearing (PTB) prosthesis is in use all over the world. A major problem in the fitting of the prostheses is the transmission of forces between stump and socket, especially for the Short-Below-Knee (SBK) amputee. A theoretical study of forces and moments might help in improving the design for a better and more adaptable prosthesis.In this work the test of 3 variations of a theoretical model of the SBK stump is reported. The models are characterised by circular symmetry and they are simple enough to allow for calculations to be made. Five equilibrium equations are proposed in each case, relating the forces and moments as a function of geometric parameters such as the diameter and length of the tibia. The calculations are carried on for the whole stance-phase period.To define and evaluate the geometric parameters 44 samples of complete joints or tibia bones were measured. The results were used as the possible range of change and the equations were solved for this whole range on a computer. The best geometric parameters (giving minimum forces) were found.The results show the theoretical importance of the total length of the stump, well known from clinical practice, the best theoretical location for the main transmission areas and the role of the fibula in the stump.