Orthotics Lab 1: Plastic Ankle Foot Orthotics - Solid Ankle (2/3/17) (5/6) Flashcards
what does SAFO stand for
Solid Ankle Foot Orthoses
for SAFOs, where does the posterior superior trimline extend
just below the popliteal fossa (approx. 3 fingers below)
for SAFOs, where does the lateral superior trimline extend
to just below the fibular head (approx. 2 fingers below)
for SAFOs, the medial superior trimline is horizontally in line with…
posterior and lateral superior trimlines
medial and lateral trimlines extend…
just anterior to the medial and lateral malleoli
anterior distal trimline depends on…
desired footplate length
what motions are controlled by SAFOs
PF, DF, pronation, supination
is the SAFO designed to correct a flexible or rigid deformity
both depending on position
if the SAFO is neutral, what is it doing
correcting a flexible deformity
if the SAFO is not in neutral, what is it doing
correct a rigid deformity
occasionally,SAFOs may be set in slight…
dorsiflexion or plantarflexion
how many degrees of dorsiflexion may be present if the SAFO was built that way
5 degrees
how does placing the SAFO into dorsiflexion effect LE alignment
flexion moment at knee
flexion moment at hip
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for the SAFO to be effective, the patient should be able to hold a….
flexed knee position with active control
when the SAFO places the ankle into PF, what happens to the knee and why
extension moment because the GRF passes anterior to the knee
what is an alternative option that may be incorporated into SAFOs
elastic anterior leg strap
how will the elastic anterior leg strap influence function
it will allow some degree of forward translation of the tibia over the talus
purpose of the medial flange in SAFO
assists in distributing the primary force utilized to control pronation by attempting to prevent IR of the tibia on the talus
purpose of the lateral flange in SAFO
disperse the primary force necessary to control supination.. it prevents ER of the tibia on the talus
