The BWM spinal fixator system: A preliminary report of a 2-year prospective, international multicenter study in a range of indications requiring surgical intervention for bone grafting and pedicle screw fixation

S. I. Bailey, P. Bartolozzi, R. Bertagnoli, S. Boriani, A. F A Van Beurden, A. T. Cross, H. P. Friedl, K. R. Gurr, H. Halm, H. J A Kruls, P. Metz- Stavenhagen, K. J. Schulze, S. I. Esses

Research output: Contribution to journalArticlepeer-review

Abstract

Study Design. A prospective, international, multicenter study of 400 patients who received the BWM fixator system. Objectives. To assess the effectiveness and safety of the system in the management of various conditions requiring spinal fixation and bone grafting. Summary of Background Data. The BWM system was developed for the management of spinal instability of all etiologies occurring in the thoracic, thoracolumbar, and lumbosacral spine. Methods. Patients with fracture, tumor, spondylolisthesis, spondylitis, failed back, or other degenerative conditions of the spine received the BWM instrumentation as described in the study literature and were regularly reviewed for 2 years. Results. The results from the first 200 patients to complete the study showed an overall graft fusion rate of 94% (95% confidence interval: 91.3%-97.6%). There were marked improvements in measures of functional ability (P <0.001, Wilcoxon test). Before surgery, less than half the patients were capable of outdoor activity. At 2 years, 80% were able to undertake outdoor activity. There were few perioperative difficulties reported. Postoperative complications associated with major surgery were seen in 18% patients. There were 23 (2.6%) pedicle screw failures, including two loosenings, and 13 (2.5%) spacer element failures, including three loosenings. Conclusions. Clinical failure was not necessarily a consequence of component failure. The BWM fixator provided excellent stabilization during the process of bone graft consolidation. The risks of complication or component failure were no higher than those associated with similar devices.

Original languageEnglish
Pages (from-to)2006-2015
Number of pages10
JournalSpine
Volume21
Issue number17
DOIs
Publication statusPublished - 1996

Keywords

  • bone grafting
  • degenerative disease
  • failed back
  • pedicle screw fixation
  • pseudarthrosis
  • spinal fracture
  • spondylitis
  • spondylolisthesis

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Orthopedics and Sports Medicine

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