Thermoplastic Ankle Foot Orthotics

Question 1

Purpose of bracing

Answer 1

Substitute for muscle weakness

Control spasticity

Maintain skeletal alignment and prevent deformities

Sagittal and coronal plane control during gait

Question 2

When to use PF/DF stops

Answer 2

DF stop- provides control of dorsiflexion in loading response to substitute for weak plantar flexors and controls knee flexion control.

PF stop- Keeps foot from dropping due to weak DF. Limits knee hyperextension in stance.

Be careful of knee instability during loading response

Question 3

SAFO indications

Answer 3

fair quad strength

combined PF and DF weakness

Best ML control

Question 4

PLS AFO

Answer 4

Controlled PF at loading response

Allows for DF

For individuals with weak DF.

Provides minimal ML support.

Question 5

GRAFO

Answer 5

Indicated with quad strength 3-/5

Provides knee extension moment at terminal stance.

Align at tibial angle of 90 or slightly plantar flexed

Longer foot plate will increase moment.

Question 6

Cavus Foot

Answer 6

Loss of intrinsic foot muscles.

Toe flexors intact.

Question 7

Pes planus

Answer 7

Tight achilles

Post tib dysfunction

Unopposed strength of peroneals

Question 8

Plantarflexion contracture

Answer 8

Unopposed PF.

Spasticity

Question 9

PF 1st ray

Answer 9

Peroneus longus over contracting