3D Printed Ankle Implant Could Replace Fusion for Cartilage Damage

A research team from the University of Twente and Radboudumc in the Netherlands is working on a better solution for ankle cartilage damage. The current options are limited. Ankle fusion eliminates pain but removes natural movement. Total ankle replacement is invasive and can restrict range of motion. The team believes 3D printing can offer a third path.

How AMPLANK Works

AMPLANK is a custom implant designed to fit precisely inside the ankle joint. The team uses patient imaging data to design a scaffold that matches the individual's anatomy. Because the implant is made to measure, surgeons do not need to remove healthy bone to make room for a standard-sized device.

The implant is built using 3D printing, though the exact process and material are still being refined during the prototype phase. The design aims to distribute loads across the joint in a way that encourages natural motion while protecting the damaged cartilage area.

Why Ankles Are Hard

Ankle joints have a complex shape and limited space. Existing cartilage repair methods often involve drilling holes into the bone to stimulate regeneration, or grafting tissue from another site. Those techniques work for some defects but fail for larger or deeper damage.

AMPLANK takes a different approach. Instead of trying to regrow cartilage in an open wound, the implant acts as a load-bearing scaffold that preserves the joint surface. If it works, patients could recover mobility faster and avoid the complete loss of ankle movement that comes with fusion.

From Simulation to Surgery

The team is currently testing prototypes with computer simulations. Those models show how the implant behaves under walking and running loads. Once the design is validated digitally, the researchers will move to anatomical testing.

The long-term goal is to apply the same approach to other joints. The elbow, wrist, and shoulder all suffer from cartilage damage that could benefit from a patient-specific 3D printed implant. If AMPLANK succeeds in the ankle, the platform could expand into a broader family of joint-preserving devices.

Collaboration and Timeline

The project sits inside HealthTech Nexus, a strategic partnership between the University of Twente and Radboudumc meant to speed healthcare innovations from lab to clinic. The Fraunhofer Innovation Platform at Twente, Sint Maartenskliniek, and industrial partners are also contributing.

There is no commercial launch date yet. The team is still in the prototyping and simulation stage. But the concept is a strong example of how 3D printing is moving from generic replacements toward personalized medicine. Custom implants are no longer a futuristic idea. They are in clinical development now.