Clinical Trial: 3D-printed Module-assisted Minimally Invasive Lumbar Pedicle Screw Placement

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: 3D-printed Module-assisted Minimally Invasive Lumbar Pedicle Screw Placement: a Retrospective, Self-controlled, Open-label Clinical Trial

Brief Summary: To explore the accuracy of 3D printed module assisted minimally invasive lumbar pedicle screw placement using Quandrant system, and verify its feasibility of reducing error rate of screw placement and postoperative complications.

Detailed Summary:

History and current related studies Pedicle screw fixation has been widely used in spinal surgery, such as spinal fractures, lumbar spondylolisthesis, scoliosis, lumbar spinal stenosis. However, difficulties in pedicle screw placement are unavoidable because of anatomical variations in the spinal structure and spinal degeneration. Consequently, the precise localization for screw placement is essential. If not, errors in screw placement will result in reduced strength or even failure of the internal fixation, which may lead to a series of injuries, including nerve root injury, dural sac tear, vascular injury and even spinal cord injury. To conclude, it is urgent to improve the accuracy of screw placement and reduce complications of screw placement in the pedicle screw fixation.

With the rapid adoption of digital medicine and 3D printing technology in orthopedic practice, 3D techniques, based on preoperative high-resolution CT scan data, can theoretically restore the three-dimensional structure of the bone. That is to say, the investigators can present a detailed description of the complex anatomical structure of the bone, to accurately make a preoperative plan and an intraoperative simulation. Numerous evidences have been achieved with digital three-dimensional reconstruction and 3D techniques to assist the posterior pedicle screw fixation in the treatment of spine lesions.

Adverse events Postoperative adverse events were recorded and reported to the Affiliated Hospital of Putian Hospital within 24 hours.

Proper therapeutic measures could be performed if the following adverse events occurred, including incision infection, back muscle pain, dural sac tear, vascular injury, nerve root injury, spinal cord injury, screw falling off and loosening.

To assess whether the screw placement by 3D printed module navigation achieves the desired results. The higher value indicates the higher accuracy.