Stand-Alone Cervical Polyetheretherketone (PEEK) Cage (Cervios) for Single to Two-Level Degenerative Disc Disease
Prasert Iampreechakul MD*, Chaichan Srisawat MD*, Wuttipong Tirakotai MD*
Affiliation : * Division of Neurological Surgery, Prasat Neurological Institue, Bangkok, Thailand
Objective : To study clinical and radiographic outcome of patients who underwent the Cervios cage-assisted anterior cervical
discectomy and fusion (ACDF) without plate fixation in single to two-level degenerative disc disease (DDD).
Material and Method: Sixty-seven patients suffering from cervical DDD with various symptoms such as radiculopathy,
myelopathy, or both were retrospectively evaluated. The cervical DDD was confirmed by plain radiographs and MR imaging.
The patients underwent radiographic evaluation to assess cervical lordosis, intervertebral height (IH), fusion, and subsidence.
Clinical assessment was graded using a visual analog scale (VAS), Modified JOA (Japanese Orthopedic Association) score,
Neck Disability Index (NDI).
Results : There were ninety two ACFD in two levels of operation. Single-level ACDF was performed in 42 patients and two-
level in 25. The outcomes revealed the significant improvement of clinical outcome and restoration of cervical lordosis. The
fusion rate was 97%, whereas subsidence occurred 7.61% but produced no symptom. There was no anterior or posterior
migration of the cage. Complications included transient dysphagia in three patients and superficial wound infection in two
patients.
Conclusion : The present study indicates that one- to two-level stand alone Cervios cage-assisted interbody fusion without
plate fixation provides improvement of clinical outcomes, restoration of lordosis and high fusion rate. However, subsidence
occurred in 7.61% but did not cause clinical symptoms and the patients had to use the cervical collar postoperatively.
Keywords : Cervical spine, Cervios, PEEK cage, Stand-alone, ACDF
