J Korean Orthop Res Soc.  2000 Oct;3(2):192-192.

A Study on the Effect of Degree of Freedom of Ankle Motion on Gait of Transfemoral Amputees with SNS Control Prosthesis

• Hong JH
• Kim SK
• Kim IO
• Ryu JC
• Kim KH
• Mun MS

Abstract

Using three different types of the ankle joint, i.e., the fixed, single-axis, and multi axis type, the gait characteristics of transfemoral amputees were investigated to understand the biomechanics of ankle joint motion during gait of transfemoral amputees with a SNS (swing and stance phase) control prosthesis controlling the flexion-extension of knee in the stance phase unlike conventional swing control prostheses. The socket pressure was measured to explain the resulting gait characteristic of the transfemoral amputees for different ankle joint components. Based on the results from the gait characteristics, socket pressure, knee flexion-extension behavior, and ground reaction vector, the fixed type ankle joint could be considered as the most appropriate ankle joint for the transfemoral amputees using the SNS control prosthesis.

Keyword

Degree of freedom (DOF); SNS (swing and stance phase) control; transfemoral prosthesis; Ankle joint; Gait characteristics; Biomechanics, Socket; pressure behavior

MeSH Terms

Amputees*
Ankle Joint
Ankle*
Axis, Cervical Vertebra
Freedom*
Gait*
Humans
Knee
Prostheses and Implants*