What does inframalleolar mean?
The malleoli are the bony prominences on either side of the ankle. Inframalleolar means the orthosis remains below these ankle bones.
This allows the device to provide substantial foot control without extending up the lower leg.
How is it different from a standard insole?
An inframalleolar orthosis generally has a deeper, more enclosing heel and side-wall structure than a simple flat or low-profile insole.
It can therefore provide more control around the heel and midfoot.
How is it different from an AFO?
An ankle-foot orthosis extends above the ankle and can directly influence ankle movement.
An inframalleolar device remains below the ankle, so its main effect is through the foot and rearfoot.
What features can it include?
- a deep heel cup;
- shaped medial and lateral walls;
- arch support;
- a structured shell;
- soft contact materials;
- straps or securing features in some designs.
Why might one be prescribed?
It may be considered where greater control of the heel and midfoot is needed than a conventional insole can provide, but full ankle control is not required.
The exact indication depends on the person’s foot position, stability and gait.
Can it fit inside ordinary footwear?
It requires adequate width, depth and opening. Some everyday shoes can accommodate the device, while others may be too shallow or narrow.
Footwear should be checked with the orthosis in place.
How should it feel?
The device should hold the heel and foot securely without sharp edge pressure or skin irritation.
Because the side walls are higher than on a conventional insole, skin checks are particularly important.
Important: Do not heat, grind, cut or reshape a clinician-supplied inframalleolar orthosis yourself.
When should it be reviewed?
Seek review if it becomes painful, causes persistent redness or skin damage, no longer fits the footwear or appears to change walking in an unwanted way.
Who should select this type of orthosis?
Selection should normally follow assessment by an orthotist, podiatrist or other appropriately qualified clinician because the level and direction of control need to match the individual foot.
