Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Cervical Stand-Alone Polyetheretherketone Cage versus Zero-Profile Anchored Spacer in Single-Level Anterior Cervical Discectomy and Fusion : Minimum 2-Year Assessment of Radiographic and Clinical Outcome

  • Cho, Hyun-Jun (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University) ;
  • Hur, Junseok W. (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University) ;
  • Lee, Jang-Bo (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University) ;
  • Han, Jin-Sol (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University) ;
  • Cho, Tai-Hyoung (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University) ;
  • Park, Jung-Yul (Department of Neurosurgery, Korea University Anam Hospital, College of Medicine, Korea University)
  • Received : 2015.04.02
  • Accepted : 2015.06.24
  • Published : 2015.08.28
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Abstract

Objective : We compared the clinical and radiographic outcomes of stand-alone polyetheretherketone (PEEK) cage and Zero-Profile anchored spacer (Zero-P) for single level anterior cervical discectomy and fusion (ACDF). Methods : We retrospectively reviewed 121 patients who underwent single level ACDF within 2 years (Jan 2011-Jan 2013) in a single institute. Total 50 patients were included for the analysis who were evaluated more than 2-year follow-up. Twenty-nine patients were allocated to the cage group (m : f=19 : 10) and 21 for Zero-P group (m : f=12 : 9). Clinical (neck disability index, visual analogue scale arm and neck) and radiographic (Cobb angle-segmental and global cervical, disc height, vertebral height) assessments were followed at pre-operative, immediate post-operative, post-3, 6, 12, and 24 month periods. Results : Demographic features and the clinical outcome showed no difference between two groups. The change between final follow-up (24 months) and immediate post-op of Cobb-segmental angle (p=0.027), disc height (p=0.002), vertebral body height (p=0.033) showed statistically better outcome for the Zero-P group than the cage group, respectively. Conclusion : The Zero-Profile anchored spacer has some advantage after cage for maintaining segmental lordosis and lowering subsidence rate after single level anterior cervical discectomy and fusion.

Keywords

References

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