Cannulated Cancellous Screws Uses
Cannulated Cancellous Screws are intended for fixation of fractures, fusions, and osteotomies of Small and large bones appropriate for the size of the device.
Cannulated Cancellous Screws have a hollow central shaft. Both cortical and cancellous screws can be cannulated. Cannulated cancellous screws are used for metaphyseal fractures while cannulated and noncannulated cortical screws are used as lag screws for fixation of diaphyseal fractures.
Partially threaded screws may be used to lag one bone fragment to another, where the bone fragment is captured by the threads of the screw and pulled toward the near cortex fragment on the head side of the screw. Fully threaded screws are intended to be used to stabilize fractures with little to no compression across the fracture.
Cannulated Cancellous Screws system provide emergency closed reduction, percutaneous screw fixation and excellent stability.
Cannulated bone screws in comparation with traditional screws decrease surgical time, allow more precise screw placement and reduce possibility of errors.
One special type of cannulated cancellous screw is the Knowles pin which is a Cannulated screws used for fixation of slipped capital femoral epiphysis in children.