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Original Article
Korean J Spine 2011;8(3): 165-171.
17
DOI: https://doi.org/10.14245/kjs.2011.8.3.165   
Polyetheretherketone Cage filled with Beta-Tricalcium Phosphate versus Autogenous Tricortical Iliac Bone Graft in Anterior Cervical Discectomy and Fusion.
Joon Huh, Jong Yang Oh, Chung Kee Chough, Chul Bum Cho, Won Il Joo, Hae Kwan Park
1Department of Neurosurgery, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea. chough@catholic.ac.kr
2Department of Neurosurgery, Gangbuk Himchan Hospital, Seoul, Korea. cancer5@catholic.ac.kr
3Department of Neurosurgery, Sacred Heart Hospital, Anyang, Korea.
Abstract
OBJECTIVE
To compare clinical and radiologic results of two graft materials for anterior cervical discectomy and fusion (ACDF) with rigid plate fixation for cervical spinal disorder.
METHODS
Twenty-eight patients treated with single-level ACDF with rigid plate fixation were retrospectively reviewed. They were divided into twogroups: Polyetheretherketone (PEEK) cage filled with beta-tricalcium phosphate (beta-TCP) in Group A (n=15); and autogenous tricortical iliac bone graft in group B (n=13). The average follow-up durations were 16.3 months and 19.90 months for group A and group B, respectively. Clinical outcomes were graded using the visual analogue scale (VAS) score and neck disability index (NDI). Interbody height, segmental kyphotic angle and overall kyphotic angle were used as parameters to evaluate radiographic change in the 2 treatment groups.
RESULTS
Clinically, VAS scores and NDI significantly improved after the surgery in both groups (p<0.05). Clinical and radiologic evaluation demonstrated no significant intergroup differences (p>0.05). The fusion rates after 12 months in group A and B were 93.3% and 100%, respectively. One case of cage subsidence which resulted in pseudoarthrosis occurred in group A. However, statistical analysis did not show difference in fusion rate between the two groups (p>0.05).
CONCLUSION
ACDF using PEEK cage filled with alpha-TCP showed comparable clinical and radiologic results with the standard of autogenous iliac bone graft. However, pseudoarthrosis did occur even with rigid plate and screw fixation in ACDF using PEEK cage filled with beta-TCP. There is high likelihood of emerging pseudoarthrosis, especially when there is a sign of chronic and progressive cage subsidence.
Keywords: Cervical vertebrae;Spinal fusion;beta-TCP PEEK cage;Iliac bone graft
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