FO & AFO Orthotics Flashcards
FO: Soft Inserts
Metatarsal pad - allows more push off in weak or inflexible feet.
Cushion heel - relieves strain on plantar fascia (plantarfasciitis)
FO: Longitudinal Arch Support
UCBL (University of CA Biomechanics Lab)
Scaphoid pad
Thomas heel
Varus post (medial wedge) "Rearfoot posting"
Reduces calcaneal eversion and IR of tibia after heel strike
Valgus post (lateral wedge) "Rearfoot posting"
Controls calcaneus and subtalar that are excessively inverted and supinated at heel strike
Forefoot posting
Medial wedge - forefoot varus
Lateral wedge - forefoot valgus
*Contraindicated in insensitive foot
Heel Lifts
Accommodates for leg length discrepancy or limitation in ankle DF
Rocker bar - improves weight shift onto metatarsals
Rocher bottom - improves push off in weak or inflexible feet; can use with insensitive feet.
Limited Motion AFO
Anterior stop (DF stop)
- If the stop allows slight DF (5 degrees), knee flexion results.
- Can be used to control knee hyperextension
- If too much DF is allowed, knee buckling could result
Limited Motion AFO
Posterior stop (PF stop)
- if the stop allows slight PF (5 degrees), knee extension results.
- Used to control unstable knee that buckles
- If too much PF is allowed, knee hyperextension could result
AFO: DF Assist
- Spring Assist (Klenzak housing)
- Posterior Leaf Spring (PLS) - to prevent foot drop
Molded AFO
** Contraindicated for patient with fluctuating leg volume!!
Posterior Leaf Spring
- DF assist
- Hold foot 90 degrees during swing
- Displaced during stance
- No mediolateral stability
Modified AFO
- Provides more medio-lateral stability
- Control of calcaneal and forefoot inversion/eversion
Solid Ankle AFO
- Controls (prevents) DF, PF, inversion, and eversion
Spiral AFO
- Provides limited control of motion in all planes
Specialized AFO:
Patellar-tendon bearing brim
- Allows weight distribution on the patellar shelf
- Reduces weight-bearing forces through the foot
