Traditional prosthetic sockets are designed from the shape of the residual limb. A prosthetist wraps the limb, makes a plaster mold, and builds the socket to match the geometry. The socket is rigid. The tissue is not. The mismatch causes pressure injuries, pain, and abandonment — roughly 35% of lower-limb amputees stop wearing their prosthesis because the socket hurts.
The new approach inverts the design pipeline. Instead of starting from geometry, it starts from force.
Origami-folded pressure sensors embedded in a silicone liner map the force distribution across the residual limb during standing, walking, and leaning. The sensors fold to conform to curved biological surfaces — solving the problem that rigid sensor arrays cannot map compliant tissue. Custom software translates the force map into a 3D-printed socket with Gyroid lattice infill — a repeating structure inspired by bone and honeycomb geometry. The lattice density varies point by point, tuned to the local force measured by the sensors.
The result: 1,600% more energy absorption when standing and 1,290% more when walking, compared to traditional solid-infill sockets.
The inversion is complete. The old pipeline: shape → socket → hope the forces work out. The new pipeline: forces → lattice → the shape follows from the physics. The socket becomes a mechanical analog of the missing limb's soft tissue — stiff where pressure is high, compliant where it's low — because it was designed from the pressure field, not from the surface contour.
The through-claim: designing from geometry assumes the shape carries the relevant information. Designing from force assumes the physics does. When the object must interface with a living system that deforms under load, the force field contains more design-relevant information than the surface shape — because the shape changes under load, and the force field is what the shape changes into.