Cortical Bone Trajectory Screws vs. Traditional Pedicle Screws Fixation
Spinal Stenosis Lumbar, Lumbar Disc Herniation, Intervertebral Disc Degeneration
About this trial
This is an interventional treatment trial for Spinal Stenosis Lumbar focused on measuring CBT, RCT, TLIF
Eligibility Criteria
Inclusion Criteria:
- Age of at least 18 years;
- All of participants will be informed consent;
- Chronic low back pain (visual analogue scale at least 3 out of 10 at rest and at least 5 out of 10 under physical strain) after having failed conservative treatment for 6 months;
- Single-segment lower lumbar vertebral disease (Including lumbar spinal cannal stenosis, foraminal stenosis, segmental instability, lumbar disc herniation, and painful disc degeneration (back disc);
Exclusion Criteria:
- Serious deformity of lumbar vertebrae;
- Dysplasia of lumbar pedicle or vertebral laminar;
- Obvious osteoporosis of lumbar vertebrae;
- Metabolic bone diseases such as osteomalacia or Paget's disease;
- Spondylolisthesis > grade 2 (Meyerding);
- Caudaequina injury or severe radiculopathy;
- Post inflammatory instability of the vertebral spine;
- Body mass index > 30;
- Immunologic diseases or Metabolic syndrome;
- Therapy with systemic corticosteroids or immunosuppressants;
- Current using Coumadin (or Warfarin) or Heparin therapy for more than 6 months at the time of operation.
Sites / Locations
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Experimental
CBT-TLIF group
PS-TLIF group
Patients who are randomised to the CBT-TLIF group will have cortical bone trajectory screws instead of pedicle screws During the opreation. After preventive use of antibliotics,A small skin incision was made at the fused segment, an entry point for insertion of the CBT screws was drilled in the junction of the center of the superior articular process and 1 mm inferior to the inferior border of the transverse process according to Matsukawa et al.A straight probe was used to create a trajectory for the CBT screws from the entry point to the opposite corner of the pedicle and vertebral body under anteroposterior fluoroscopic guidance.nilateral facetectomy is performed to gain access to the intervertebral disc.Afterwards, interbody fusion was performed.Device: CBT screws.
Patients who are randomised to the PS-TLIF group will have pedicle screws During the opreation. A posterior midline incision, about 6 cm, was performed at the level of interest level under fluoroscopic guidance. Pedicle screws were inserted into the vertebral body by using freehand, and the inferior and superior articular processes and part pf the lamina were removed by using an osteotome. To expose the lateral border of the ipsilateral nerve root, the ligamentum flavum was removed. Afterwards, interbody fusion was performed.Device:traditional pedicle screws.