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

Hyun Jun Cho, Junseok W. Hur, Jang Bo Lee, Jin Sol Han, Tai Hyoung Cho, Jung Yul Park

Research output: Contribution to journalArticle

11 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalJournal of Korean Neurosurgical Society
Issue number2
Publication statusPublished - 2015 Jan 1



  • Anterior cervical discectomy and fusion
  • Kyphosis
  • Stand-alone cage
  • Subsidence
  • Zero-profile

ASJC Scopus subject areas

  • Surgery
  • Neuroscience(all)
  • Clinical Neurology

Cite this