Correlation of Radiostereometric Measured Cervical Range of Motion With Clinical Radiographic Findings After Anterior Cervical Discectomy and Fusion

• DOI: 10.1097/brs.0b013e31819819a0
• Publication Date: 2009-05-21T14:44:38Z
• Authors: Soo-An Park; Amir H. Fayyazi; Nathaniel R. Ordway; Mike H. Sun; Bruce E. Fredrickson; Hansen A. Yuan
• Keywords: Pseudarthrosis; Discectomy; Corpectomy

In Brief Study Design. Prospective clinical study. Objective. To evaluate the correlation between radiographic findings and sagittal range of motion (ROM) measured using radiostereometric analysis (RSA) after anterior cervical discectomy fusion (ACDF). Summary Background Data. Evaluation ACDF continues to be difficult. Radiographic films including flexion/extension views are routinely used for this purpose. Unfortunately, routine radiographs insensitive in demonstrating pseudarthrosis. RSA is an accurate technique that can evaluation segmental vivo potentially spinal fusion. Methods. Sixteen patients who underwent multi-level were enrolled The procedure was performed fashion; plates utilized each case. Intraoperatively, 3 5 tantalum beads inserted into vertebral body. At 1-year follow-up period, ROM operated segments with RSA. addition, segment clinically evaluated evidence by a 3-point grading system (fused, uncertain, pseudarthrosis) measuring interspinous widening on films. evaluated. Results. Fourteen 2-level two 3-level procedures representing 31 analyzed. average all as 1.3 ± 1.4°. less than 2 mm at 1.1° 1.0° RSA, whereas greater 3.4° 2.9°; significant noted 2-point method (Pearson coefficient, r = 0.504, P 0.004). Using system, there 20 levels graded fused (0.8° 0.9°), 6 uncertain (1.7° 1.0°), 4 pseudarthrosis (3.5° 2.7°). group showed significantly (P 0.005); 0.561, 0.001). Conclusion. study, we utility evaluating demonstrated difference when compared appears quantitative capable assisting Radiostereometric different comparison