CMP FEET

Question 1

Single axis

Answer 1

Simplicity
Limited ambulation or max durability required
Inexpensive and durable
Rigid forefoot: not energy efficient

Question 2

SACH

Answer 2

Rapid foot flat
Enhance knee stability
Biomechanical stability in early stance
Abrupt DF stop increases knee hyperextension moment
Disadvantage: increased weight, maintenance initial cost, no energy efficient

Question 3

Multi axial

Answer 3

Hindfoot inversion/eversion 
Internal/external rotation
Accommodate uneven surfaces
Reduces stress on skin and px 
Dis: increased weight, maintenance, initial cost

Question 4

Flexible-keel

Answer 4

Smooth easy rollover
To make ambulation easier
Comfortable and reliable
Dis: limited pushoff, increased cost

Question 5

Dynamic response

Answer 5

Dynamic pushoff
To increase activity level
Subjective sense of dynamic responsiveness
Increased cost