2021-07-16

[Picture] Good news for arthritis patients: Using 3D printing to make knee surgery better and faster

By yqqlm yqqlm

[Picture] Good news for arthritis patients: Using 3D printing to make knee surgery better and faster

For many people with knee arthritis , A surgical procedure called high tibial osteotomy (HTO) usually brings relief. HTO surgery involves cutting the patient’s tibia (tibia) directly below the knee, then using the incision to open a small gap in the bone, and finally holding the bone in that position by fixing the stabilizing plate to the cut side. Doing so will readjust the knee so that the load is now placed on the less worn part of the joint.

Currently, doctors use “off-the-shelf” steel plates that do not exactly match the contour of the patient’s tibia. This means it takes some time to select the bone plate, then place it on the bone and screw it into place. Even so, the resulting knee joint adjustment may not fully meet the requirements.

In the experimental new knee-aligned osteotomy (TOKA) procedure developed by the University of Bath in the UK, doctors first performed 3D CT scans of the patient’s tibia and knee. Using this data, they then 3D printed a titanium alloy plate whose shape perfectly matched the patient’s tibia. They also printed a patient-specific jig to guide the placement of the board.

According to the university, TOKA should lead to better knee alignment, increase joint stability, and reduce patient discomfort. In addition, by preparing everything in advance, the time of the operation itself should be reduced from two hours to about 30 minutes.

In an ongoing trial at the Rizzoli Institute in Italy, 25 patients have undergone the procedure so far. The plan calls for trials to begin in the UK later this year, involving hospitals in Bath, Bristol, Exeter and Cardiff.