3D printing enables customized knee replacement

One of the most promising applications of 3D printing in medical fields is its ability to produce patient-specific devices. We have recently seen 3D-printed implants enable a teenager to walk again, substitute cancerous vertebra in the neck, enable customized spinal fusion surgery and replace upper and lower jaws.

Knee replacement surgery is a procedure undertaken by around 700,000 people annually, according to the Center for Disease Control and Prevention. Issues that can arise range from minor blood loss and infections, to the threat of deep venous thrombosis. But the team at ComforMIS believes it can improve on traditional methods by steering away from generic, “off-the-shelf” implants to a more customizable solution.

The company’s approach is much like others used in the production of 3D-printed implants. A CT scan is taken of the patient’s hip, knee and ankle, with the company’s specialized software converting the scan into an exact 3D model of the patient’s deteriorating knee. Using this model, personalized implants and instruments are made as one-off devices, produced, in part, by 3D printers.


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