OBJECTIVE: A prospective clinical follow-up study of patients who underwent thoracolumbar intraspinal surgery with replacement of the posterior spinal arch and supporting elements is reported.

PATIENTS and METHODS: The surgical procedures of 45 patients who underwent intraspinal surgery with osteotomy and replacement of 122 spinal laminae using an air drill and mini-plates with repair of the supraspinous ligaments were analyzed. Data of a complete clinical and radiological follow-up examination were evaluated in 45 patients. Plain radiographs and computed tomography scans were analyzed for bony healing of the laminae and spinal alignment.

RESULTS: No complications due to the technique were observed. None of the patients had kyphosis and/or instability on static or dynamic plain x-ray films. There was no scar tissue invasion in the spinal canal based on MRI findings.

CONCLUSIONS: No patient required additional surgery because of progressive spinal instability. This technique is safe and well-suited to serve as a standard posterior approach to intraspinal pathologies and offers distinct advantages over laminectomy and repeat surgery.