Rearfoot Post
A wedge built under the heel of the shell that biases the rearfoot toward neutral and controls excess pronation or supination at heel strike.
How it works
At heel strike the calcaneus is the first thing to load, and its angle sets the tone for everything that follows. A rearfoot post is a wedge modeled into the heel seat of the shell that tilts the surface the calcaneus lands on. A medial (varus) post resists the rapid eversion of a pronating rearfoot, while a lateral (valgus) post does the opposite for a foot that lands too inverted.
By slowing and limiting frontal-plane motion in the first fraction of stance, the post reduces the torque that travels up through the tibia, calms tissues strained by end-range pronation or supination, and puts the subtalar joint in a better position for the arch to do its job through midstance.
When to prescribe it
- Excess rearfoot pronation with prolonged or rapid eversion at heel strike
- Early posterior tibial tendon dysfunction and medial ankle strain
- Rearfoot varus that compensates through the subtalar joint
- Medial knee or shin symptoms driven by internal tibial rotation
- Over-supination that needs a lateral (valgus) post to find the ground
How we build it
You set the post in the Rx as a direction and a degree value, and we model it intrinsically into the heel seat. Our shells are FDM-printed on a flat base, so the correction lives entirely in the top surface, never in a glued-on wedge that can shift, compress or delaminate. Because the geometry is computed against the patient's actual heel scan, the correction is exactly the angle you prescribed, and it reprints identically on every reorder.