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Comparison of Artificial Disc Implants in Cervical Disc Arthroplasty
Comparison of Unconstrained and Semi-constrained Artificial Disc Implants Used in Cervical Disc Arthroplasty
Who can join
Ages 18 to 60 · All sexes
Full eligibility criteria
Inclusion Criteria: * Patient is skeletally mature and between 18 to 60 years of age * Experiences cervical spondylotic myelopathy and/or radiculopathy typically caused by disc herniation or degenerative disc disease at a single level between C3 to C7 * Is unresponsive to at least six weeks of non-surgical conservative care * Has the intention of undergoing cervical arthroplasty for their chief complaint * Signed informed consent form Exclusion Criteria: * Patient has had prior cervical spine surgery * Has more than two diseased levels requiring surgery * Has a known allergy to a metal alloy or polyethylene * Is morbidly obese * Has active local or system infection * Has any circumstances or conditions such that their ability to provide informed consent comply with follow-up requirements, or provide self-assessments is compromised (eg: psychiatric disorders, chronic alcohol or substance abuse, etc.)
About the study
This study will comprehensively evaluate the outcomes and endpoints of these two different FDA-approved artificial disc implants used to treat cervical spondylotic myelopathy and/or radiculopathy today: Biomet Zimmer Mobi-C and Nuvasive Simplify. Both implants are structurally different with the Nuvasive Simplify implementing a three-piece design with two endplates and a semi-constrained mobile core while the Biomet Zimmer Mobi-C implements an unconstrained three piece design. Subjects will be age-matched and randomly assigned to either implant with informed consent. All subjects will undergo a variety of assessments that evaluate neck disability, quality of life, pain, physiological outcome (radiographic assessments), and neck range-of motion before and after their procedure. One baseline testing will be conducted along with three post-operation visits (three months, six months, and one year) in accordance to standard follow-up procedure. Thus, the duration of participation in the study will be approximately one and a half years.
What is being tested
- Cervical arthroplasty (procedure)
- Semi-Constrained Nuvasive Simplify (device)
- Unconstrained Biomet Zimmer Mobi-C (device)
Sponsor: University of California, Los Angeles · Participants: 20 · Started: May 1, 2023
Contact the study team
- Daniel C Lu, MD, PhD · Phone: (310) 267-2975
- Sandra Holley, PhD · Phone: 310-267-1770
Official record on ClinicalTrials.gov — NCT05701059
Locations in the U.S.
| California | UCLA, Los Angeles |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.