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Prosthetic Feet

Overview of Prosthetic Feet and Ankles

Generic Class FootBasic FunctionPrimary IndicationMajor AdvantagesChief Limitations
Single axis Simplicity Limited ambulation or max durability required Inexpensive, durable Rigid forefoot, no energy return
SACH Rapid foot flat To enhance knee stability Biomechanical stability in early stance Abrupt dorsiflexion stop increases knee hyperextension moment; weight; maintenance; cost
Multiaxial Hindfoot inversion/eversion; internal/external rotation To accomodate uneven surfaces Reduces stress on skin and prosthesis Weight; maintenance; cost
Flexible keel Smooth easy rollover To make ambulation easier Comfortable, reliable Limited push off; cost
Dynamic response Dynamic push off To increase activity level Subjective sense of dynamic responsiveness Cost
Created by: npoliti