The consistent and premature timing of the GRF peaks during terminal stance on the affected limb () and the increase in the vertical GRF peak on the sound limb during loading response () may reflect a "drop" off the front of the prosthetic forefoot and the person with amputation landing more heavily on the sound limb to check the fall, which has been reported in persons with transtibial amputation  when the effective foot length is too short or the prosthetic forefoot too compliant.
The Boot design of the SAFoot features integrated Velcro straps for easy entry and a snug fit. The SAFoot provides additional support for mid metatarsal and further proximal amputation levels.
Partial-Foot Amputations: Prosthetic and Orthotic Management ..
As a result of the clamshell devices fitted to the subjects with Chopart amputation, in whom ankle motion was eliminated, progression to foot flat during loading response was delayed as the shank and foot segments moved synchronously. The reduced and delayed attainment of the peak ankle angles were comparable to investigations of various prosthetic feet in persons with transtibial amputation [32-33] and reflect the force-deflection characteristics of the prosthetic feet rather than true ankle motion.
A partial foot prosthesis replaces the function of the anatomical ..
This allows the individual to walk at different cadences and have the prosthetic knee keep pace to ensure the prosthesis is always in the correct position for safety when placing weight onto the prosthesis at heel contact.
Partial Foot Prosthesis < > Patient Services
This lock is released when the toe of the prosthetic foot is in contact with the ground and weight is transferred off of the prosthesis.
Manual Locking Knees (Impact Level Low)
A Manual Lock feature can be added to many knee designs and would usually be used by very low impact level individuals, who need to ambulate with no possibility of the knee bending, unless the lock is manually released.
4 Bar Knees (Impact Level Low to Moderate unless it is combined with pneumatic or hydraulic control for High)
This type of knee is designed to have more than one center of rotation throughout the bending cycle and in this way mimics the human anatomical knee joint.
following partial foot designs ..
Retroreflective markers were located on the following anatomical landmarks: the spinous process of the fifth lumbar vertebra, the anterior superior iliac spine, the greater trochanter of the femur, the knee joint space inferior to the lateral epicondyle of the femur, the lateral malleolus, the posterior calcaneus at the level of the fifth metatarsal head marker, and the fifth metatarsal head or its estimated location. Markers were also located midthigh and midleg just anterior to the line connecting the proximal and distal segment markers. The location of the absent fifth metatarsal head was duplicated from the sound foot by placement of a ruler posterior to the shod foot and measurement of the distance from the ruler to the center of the marker. In the case of bilateral PFA, the locations of the absent fifth metatarsal heads were estimated with respect to the lateral malleolus by regression equations based on stature , which were validated with nonamputees . Markers were located on the outside of the prosthesis over the bony landmarks as was necessary.
• Partial foot amputation prosthesis ..
A partial foot prosthesis can help distribute the weight-bearing forces comfortably on the remaining foot and allow for the patient to walk for a longer period of time without pain or discomfort. With today’s technology, materials and fabrication process allows for partial foot prosthesis to look amazingly realistic.