Mechanical failure of the Mobi-C implant for artificial cervical disc replacement: report of 4 cases

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  • 1 Department of Neurosurgery, University of California, Los Angeles;
  • 2 Department of Neurosurgery, Scripps Memorial Hospital, La Jolla;
  • 3 Long Beach Memorial Medical Center, Long Beach; and
  • 4 Department of Orthopedic Surgery, Orthopedic Specialty Institute, Medical Group of Orange County, Orange, California
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Cervical spondylosis is one of the most commonly treated conditions in neurosurgery. Increasingly, cervical disc replacement (CDR) has become an alternative to traditional arthrodesis, particularly when treating younger patients. Thus, surgeons continue to gain a greater understanding of short- and long-term complications of arthroplasty. Here, the authors present a series of 4 patients initially treated with Mobi-C artificial disc implants who developed postoperative neck pain. Dynamic imaging revealed segmental kyphosis at the level of the implant. All implants were locked in the flexion position, and all patients required reoperation. This is the first reported case series of symptomatic segmental kyphosis after CDR.

ABBREVIATIONS ACDF = anterior cervical discectomy and fusion; CDR = cervical disc replacement; SSK = symptomatic segmental kyphosis.

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Contributor Notes

Correspondence Duncan Q. McBride: Harbor/UCLA Medical Center, Torrance, CA. dmcbride@mednet.ucla.edu.

INCLUDE WHEN CITING Published online July 31, 2020; DOI: 10.3171/2020.5.SPINE19442.

Disclosures Dr. Lanman is a consultant for and has royalty arrangements with Medtronic. Dr. McBride is a consultant for Centinal Spine.

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