Shell Modifications

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All shell modifications will be constructed out of polypropylene material or EVA* for the base of the orthotic device unless otherwise indicated.

Morton’s extension

shell-mod1Extension sub 1st MPJ from distal edge of shell to distal end of orthotics.

Indications: Painful hallux limitus/rigidus, short first metatarsal with hallux limitus or pain on dorsiflexion.

Reverse morton’s extension

shell-mod1 Extension sub 4th and 5th MPJ from distal edge of shell to distal end of orthotics.

Indications: Painful hallux limitus/rigidus, 4th and 5th MPJ pain.

1st Ray cut out

shell-mod1 Removal of orthotic shell beginning proximal to the first metatarsal base and angled to the lateral aspect of the first metatarsal head.

Indications: Rigid plantar flexed 1st Ray, functional hallux limitus.

Lateral Flange

shell-mod1 Lateral side of the orthotics raised to encompass more of lateral arch.

Indications: Control lateral ankle instability for prevention of ankle sprains, support rigid rearfoot varus deformities such as clubfoot.

1st MPJ cut-out

shell-mod1 Removal of orthotic shell under the first metatarsal head.

Indications: Forefoot valgus deformity, sesamoiditis, hallux limitus with dorsal osteophytic formation.

Medial Flange

shell-mod1 Medial side of orthosis raised to reach near or above the navicular.

Indications: Control of severe pronation, accommodate conditions such as posterior tibial tendon dysfunction.

Fascial groove

shell-mod1 Canal shaped cut-out in shell material in area of medial plantar fascial ligament/flexor hallucis brevis.

Indications: Anatomically tight plantar fascia, severe plantar fasciitis.

  • * EVA: Ethylene vinyl acetate is the copolymer of ethylene and vinyl acetate. It’s an extremely elastic material that can be sintered to form a porous material similar to rubber, yet with excellent toughness. It is resistant to cracks and ultra violet radiation.
  • * PORON: cellular urethanes are engineered, medium density, microcellular (cells are roughly 100 microns) foam material. They are used in orthopedic and prosthetic applications, including custom orthotics, custom prefabricated orthotics, prosthetic padding and other biomechanical supports.