Orthotics Lab 1: Plastic Ankle Foot Orthotics - Solid Ankle (2/3/17) (5/6)

Question 1

what does SAFO stand for

Answer 1

Solid Ankle Foot Orthoses

Question 2

for SAFOs, where does the posterior superior trimline extend

Answer 2

just below the popliteal fossa (approx. 3 fingers below)

Question 3

for SAFOs, where does the lateral superior trimline extend

Answer 3

to just below the fibular head (approx. 2 fingers below)

Question 4

for SAFOs, the medial superior trimline is horizontally in line with…

Answer 4

posterior and lateral superior trimlines

Question 5

medial and lateral trimlines extend…

Answer 5

just anterior to the medial and lateral malleoli

Question 6

anterior distal trimline depends on…

Answer 6

desired footplate length

Question 7

what motions are controlled by SAFOs

Answer 7

PF, DF, pronation, supination

Question 8

is the SAFO designed to correct a flexible or rigid deformity

Answer 8

both depending on position

Question 9

if the SAFO is neutral, what is it doing

Answer 9

correcting a flexible deformity

Question 10

if the SAFO is not in neutral, what is it doing

Answer 10

correct a rigid deformity

Question 11

occasionally,SAFOs may be set in slight…

Answer 11

dorsiflexion or plantarflexion

Question 12

how many degrees of dorsiflexion may be present if the SAFO was built that way

Answer 12

5 degrees

Question 13

how does placing the SAFO into dorsiflexion effect LE alignment

Answer 13

flexion moment at knee

flexion moment at hip

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Question 14

for the SAFO to be effective, the patient should be able to hold a….

Answer 14

flexed knee position with active control

Question 15

when the SAFO places the ankle into PF, what happens to the knee and why

Answer 15

extension moment because the GRF passes anterior to the knee

Question 16

what is an alternative option that may be incorporated into SAFOs

Answer 16

elastic anterior leg strap

Question 17

how will the elastic anterior leg strap influence function

Answer 17

it will allow some degree of forward translation of the tibia over the talus

Question 18

purpose of the medial flange in SAFO

Answer 18

assists in distributing the primary force utilized to control pronation by attempting to prevent IR of the tibia on the talus

Question 19

purpose of the lateral flange in SAFO

Answer 19

disperse the primary force necessary to control supination.. it prevents ER of the tibia on the talus