Cannulated Screw System

Cannulated Screw System

Cannulated screws are a common method of fixation used by orthopedic surgeons for multiple fracture patterns. These screws may be cannulated or "hollow" to allow them to be placed over a guidewire facilitating better alignment prior to drilling or screw insertion. The guidewire is then removed and the screw is left in place.
There are headless type and with head type, also many different sizes of cannulated screws are available 3.0,4.0,6.5,7.3.

▶▶ Cannulated Compression Screws

Compared with the conventional screw thread, Double head screw thread is deeper, the spiral angle is bigger.

The proximal thread pitch is 30% smaller than the distal thread and can make effectively pressure to the fracture. Deeper and more sharp tooth design, easy to penetrate cortical bone, improve the gripping forece.

Torx head can be better controlled and prevent skidding.

▶▶ Cannulated Headless Compression Screws

When the screw is implanted, the fracture is well compressed by the thread, which will increase the stability of the fracture.

After insertion, it can keep compressing function under periodic forces.

The thread pitch, which is bigger in the head, varies from the head to the tall, so the speed of the screw head into the bone is faster than the screw tall.Thus when implanting, the threads will force the fracture surface.

Superior performance of the triangular blades makes it to implant and remove the screw easily.

Make screw tail embedded in the bone surface, it can reduce the stimulation of the soft tissue.

With the guidance of guide wire, percutaneous implantation will be more efficiency.

Both the screw head and tall has bilateral edges which can reduce the risk of hole cracking when inserting or removing the screw.

▶▶ Products Advantages

● Titanium alloy material has better biocompatibility, and CT and MRI are compatible.

● The notch of the nail head is lower to reduce the interference to the surrounding tissue.

● Provide 1 / 3 thread, half thread and full thread design.

● Head self tapping and self drilling design, easy to operate and effectively shorten the operation time.

● Superior performance of the triangular blades makes it to implant and remove the screw easily.

● After insertion, it can keep compression function under periodic forces.

● Torx head can be better controlled and prevent skidding.