3D-Printed Implant for Personalized Knee Realignments

"Researchers at the University of Bath in the UK created a framework for 3D printing personalized high-tibial osteotomy (HTO) plates, using a titanium alloy, for knee realignments in osteoarthritis patients. The plates should fit nearly perfectly when implanted thanks to the new approach. The researchers have also developed an improved surgical technique, the TOKA (Tailored Osteotomy for Knee Alignment), which they claim should improve the fit of the HTO on the knee and significantly speed up HTO surgery from two hours to approximately 30 minutes.

“Knee osteoarthritis is a major health, social and economic issue and does not receive as much attention as it should. A quarter of women over 45 have it, and about 15 percent of men, so it’s a significant burden that many live with,” said Richie Gill, a researcher involved in the study, in a press release. “Knee replacement is only useful for end-stage osteoarthritis, so you can be in pain and have to live with a disability for a long time, potentially decades, before it’s possible. We hope that the new TOKA process we’ve developed will change that.”.

To begin the procedure, patients undergo a 3D CT scan of the knee, and these data are then used to manufacture a personalized HTO and surgical guide that fit their shin bone perfectly. The 3D-printing process relies on a metal printing technique that results in medical-grade titanium-alloy plates. The manufactured surgical guide helps to simplify and speed up the surgery. As the implants fit the patient perfectly, they are intended to reduce discomfort post-surgery and can be implanted in earlier stage patients..." Lire la suite