Ten-year Outcomes of Cervical Disc Replacement with the BRYAN Cervical Disc: Results from a Prospective, Randomized, Controlled Clinical Trial

William F. Lavelle, K. Daniel Riew, Allan D. Levi, Jeffrey E. Florman

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Study Design.A prospective, randomized multicenter IDE trial between May 2002 and October 2004.Objective.The aim of this study was to report on the 10-year safety and efficacy of BRYAN cervical disc arthroplasty (CDA).Summary of Background Data.Cervical disc arthroplasty (CDA) is a potential alternative for anterior cervical decompression and fusion (ACDF) with the hope that maintenance of motion may decrease the likelihood of adjacent segment disease.Methods.This is an analysis of a US Food and Drug Administration (FDA) investigation comparing CDA with ACDF for single-level patients. Eligible patients were ≥ 21 years of age with symptomatic cervical disc disease who had failed conservative care. Patients were followed at regular intervals with the current data set at > 10 years. Protocol for overall success: ≥ 15-point improvement in NDI scores, maintenance or improvement in neurologic status, no serious adverse events related to implant or implant/surgical procedure, and no subsequent surgery or intervention classified as "failure."Results.At 10-year follow-up, 128 (CDA) and 104 (ACDF) patients were available for evaluation. Overall success rate was significantly higher for CDA group (81.3% vs. 66.3%; P = 0.005). The rate of second surgeries at adjacent levels was lower for CDA group (9.7% vs. 15.8%; P = 0.146). NDI scores improved significantly in CDA group (Δ38.3 vs. Δ31.1; P = 0.010). Visual Analog Scale (VAS) neck and arm improved in the CDA group (Δ54.3 vs. Δ49.2; P = 0.119), (Δ58.1 vs. Δ51.6; P = 0.0.60) respectively. About 4.1% of CDA patients and 4.9% of ACDF patients had serious adverse events related to study device. Mean angular motions at index level for BRYAN disc and ACDF were 8.69° and 0.60°, respectively.Conclusion.CDA can preserve and maintain motion in the long term compared with ACDF. There was a trend toward fewer adjacent segment surgeries for BRYAN disc that did not reach significance. Significant improvement in CDA NDI scores may suggest better long-term success for CDA as compared to fusion.

Original languageEnglish (US)
Pages (from-to)601-608
Number of pages8
Issue number9
StatePublished - May 1 2019


  • BRYAN cervical disc
  • adjacent level disc degeneration
  • anterior cervical decompression and fusion (ACDF)
  • cervical
  • cervical angular motion
  • cervical disc arthroplasty (CDA)
  • cervical disc disease

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology


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