8 key notes on pedicle screw-only constructs for SCI-related scoliosis surgery

Spine

The researchers in a new article examined the MRI for patients who underwent spinal cord injury-related scoliosis correction with pedicle screw-only constructs and published their findings in Spine.

The researchers from Tufts Medical Center in Boston examined 37 patients who underwent the procedure from 2004 to 2011. The patients were all around 15 years old. The researchers found:

 

1. The average preoperative coronal Cobb angle was 65.5 degrees±25.7 degrees, corrected to on average 20.3 degrees±14.4 degrees. This translated to a 69 percent correction.

 

2. Preoperative coronal balance was 24.4±22.6 mm. There was a postoperative measurement of 21.6±20.7.

 

3. The preoperative pelvic obliquity was 12.7 degrees±8.7 degrees, which was corrected to 4.1 degrees±3.8 degrees. This translated to a 68 percent correct6ion.

 

4. The preoperative shoulder balance, measured by the clavicle angle, was 8.2 degrees±8.4 degrees. The correction was 2.7 degrees±3.1 degrees. This was a 67 percent correction.

 

5. The preoperative thoracic kyphosis measurement was 44.2 degrees±23.7 degrees. Postoperatively the measurement was 33.8 degrees±11.5 degrees.

 

6. Preoperative thoracolumbar kyphosis was 18.7 degrees±12.1 degrees. This was reduced to 8.1 degrees±7.7 degrees after surgery. At the last follow-up it was measured at 26.8 degrees±20.2 degrees.

 

7. The preoperative lumbar lordosis was 35.3 degrees±20.2 degrees. Postoperatively, lumbar lordosis remained stable.

 

8. The pedicle screws show better coronal parameters than historically reported and can also provide significant sagittal kyphosis improvement. The researchers concluded, "Although pedicle screws appear to provide good radiographic results, correlation with clinical outcomes is necessary to determine the true impact of pedicle screw construct on SCI-related scoliosis correction."

 

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