Bone Cement Injection

Bone Cement Injection

Improving the application of bone cement for screw fixation

Patients who have suffered fractures may require bone plates and screws in order to fully recover. Not every patient has the bone quality necessary for this, especially elderly patients with osteoporosis.

The project aimed to develop a procedure of cement injection into the fracture site which would reinforce the screws in patients otherwise unable to receive them. Studies showed that cement placed closer to the cortica layer (outer layer of bone) greatly improved the pull-out strength of the screw.

The design can determine the depth of the cortical layer and improves on the cement distribution within the bone. After extensive testing, the team managed to create a cannula which can deliver cement at the best location under the cortical layer in order to maximise pull-out strength of screws.