Mobi c implant

The intact base model used for cervical validation had C2-C7 lordosis with a Cobb angle of −5°. This model was modified to represent three different alignments with the following Cobb angles (a) lordotic (−10°), (b) straight (0°), and (c) kyphotic (+10°).
The TDR implant used in this study was modeled after the Mobi-C implant (Zimmer–Biomet, Warsaw, IN, USA). The TDR surgery was simulated in cervical alignment models (lordotic, straight, and kyphotic) at the C5-C6 segment without altering the lordosis of the index segment. The surgery was simulated by removing the ALL at the C5-C6 segment, anterior portion of the annulus, and complete removal of the nucleus. The interaction between the metal–polymer surfaces was simulated using surface-to-surface contact formulation in ABAQUS with a coefficient of friction of 0.1.[21 (link)] The polymer core of the TDR implant was free to move in any direction unless stopped by the metal stoppers present on the inferior endplate of the implant. The endplates of the implant were tied to their respective vertebra to represent osteointegration and prevent subsidence of the implant.[21 (link)]

This was a retrospective review of prospectively collected data of a 3-surgeon cohort of patients who underwent surgery at a single academic institution between February 2016 and February 2020. Consecutive patients who underwent primary elective 1- or 2-level CDR for cervical discogenic myelopathy or radiculopathy were included. Patients who underwent revision surgery (n =1) or concomitant fusion (n =6) were excluded. Patients who did not have preoperative radiographic imaging available in the Picture Archiving and Communications System (PACS) were also excluded (n =4).
All surgeries were performed using the Smith-Robinson approach, which is described extensively in previous literature [24 -26 (link)]. All surgeries utilized the Mobi-C implant (Zimmer Biomet, Warsaw, IN, USA). Implant size was determined intraoperatively by the operating surgeon, and implant height for all patients included in this series was either 5 mm or 6 mm.