Ottobock Helix Hip: The Helix 3D prosthetic hip provides a more natural walk. With its three-dimensional pelvic rotation, the Helix mimics the natural movement of the human body, unlike other prosthetic “hinged” hips. The unique Helix design also helps lower extremity amputees start their steps more smoothly, improves toe clearance, and makes it easier to extend the leg during walking. Users will spend much less energy thinking about their next step, walk more naturally and confidently, and experience less pain in the back and joints.