Vertebral reconstruction using the telescopic plate spacer-thoracolumbar (TPS-TL) device
STUDY DESIGN: Retrospective study of surgical technique and outcome. OBJECTIVE: The authors conducted a study to evaluate the ability of the TPS-TL (telescopic plate spacer-thoracolumbar) implant to correct kyphotic deformity and restore vertebral body height after vertebrectomy in the thoracolumbar spine. SUMMARY OF BACKGROUND DATA: TPS-TL is a novel vertebral body replacement device that consists of an expandable cage with an integrated plate component for transvertebral screw fixation. METHODS: This is a retrospective study of 20 patients who underwent anterior column reconstruction with TPS-TL after a 1 or 2 level thoracolumbar vertebrectomy. Preoperative and postoperative sagittal alignment and vertebral body heights were radiologically analyzed in all patients. The mean follow-up was 14 months. RESULTS: Preoperative and postoperative Cobb angles were measured to assess sagittal alignment. The average preoperative Cobb angle was 16.0 + or - 7 degrees. This was reduced to 9.8 + or - 10 degrees at the final follow-up (P<0.001). Percent of ideal vertebral body height was used to assess postoperative restoration of vertebral body height. This value was obtained by creating a ratio of the height of the effected vertebral levels to the height of the adjacent normal vertebral bodies. The mean percent of ideal vertebral body height improved from a preoperative value from 86.2 + or - 2% to 93.1 + or - 6% at the final follow-up (P<0.001). CONCLUSIONS: The TPS-TL implant is effective in restoring vertebral body height and correcting kyphotic deformity after thoracolumbar vertebrectomy.
Atalay B, Riesenburger RI, Schirmer CM, Bhadelia RA, Weller SJ. Vertebral reconstruction using the telescopic plate spacer-thoracolumbar (TPS-TL) device J Spinal Disord Tech 2010 Jul;23(5):338-46.