The world’s first ‘space-age’ bone that saved a Madrid patient’s leg from amputation

A pioneering 3D-printed bone has saved a Madrid patient's leg from amputation, marking the world's first 'space-age' bone implant. Hospitalized in the city with a severe case of high-grade sarcoma in his tibia, 38-year-old Pierre was at risk of losing his leg due to a loss of bone density and infection. Standard metal prostheses are heavy and costly, but surgeons at Hospital Gregorio Marañón devised a lighter, more effective solution.

Utilizing a metamaterial lattice, the titanium rods were engineered to resemble the bone's natural structure, allowing the implant to weigh just 300 grams and support over 500 kilos. By simulating the real forces a tibia endures, doctors calculated the precise shape the implant needed to maintain weight distribution. The 3D-printed implant, costing around €3,000, was infused with a spongy bone graft supplied by the hospital's tissue bank, encouraging the growth of real bone.

Nearly a year post-operation, Pierre has experienced no complications and maintains excellent knee alignment and mobility, even walking without crutches. The successful implantation has already been replicated in another patient, with plans for further personalized implants for the wrist and sternum. Surgeons aim to make such advanced implantations accessible through Spain's public health system, starting with sarcoma patients treated at the hospital's prestigious cancer center.