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Is zero profile anchored spacer beneficial to patients rather than stand-alone cage
EANS Academy. Jung J. 09/26/19; 276082; EP02054
Ji Ho Jung
Ji Ho Jung

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Abstract
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Introduction: This study was aimed to compare the clinical and radiologic results of stand-alone synthetic polyetheretherketone (PEEK) cage with Zero-profile anchored spacer (Zero-P) for single level anterior cervical discectomy and fusion (ACDF).
Materials and methods: Between April 2005 and September 2014, 101 patients who underwent single level ACDF using stand-alone PEEK cage or Zero-P were reviewed retrospectively. The patients were divided into two groups. Stand-alone PEEK cage group included 77 patients and 24 patients were included Zero-P. Radiologic parameters were assessed on lateral radiographs and fusion was assessed on computed tomography (CT) scan. For evaluation of clinical outcomes, visual analogue scale (VAS), Neck disability index (NDI) and modified Japanese Orthopedic Association (mJOA) score were measured.
Results: General characteristics and the clinical outcome showed no significant difference between two groups. The loss of interbody height (p=0.001) and subsidence (p=0.035) showed statistically significant difference between group A and B. However, there were no significant difference between VAS, NDI and mJOA at the same period.
Conclusion: Although zero-P was better in radiologic assessment, overall clinical outcome did not differ between two groups, and even in the smallest case, the morbidity due to zero-P should not be ignored.
Introduction: This study was aimed to compare the clinical and radiologic results of stand-alone synthetic polyetheretherketone (PEEK) cage with Zero-profile anchored spacer (Zero-P) for single level anterior cervical discectomy and fusion (ACDF).
Materials and methods: Between April 2005 and September 2014, 101 patients who underwent single level ACDF using stand-alone PEEK cage or Zero-P were reviewed retrospectively. The patients were divided into two groups. Stand-alone PEEK cage group included 77 patients and 24 patients were included Zero-P. Radiologic parameters were assessed on lateral radiographs and fusion was assessed on computed tomography (CT) scan. For evaluation of clinical outcomes, visual analogue scale (VAS), Neck disability index (NDI) and modified Japanese Orthopedic Association (mJOA) score were measured.
Results: General characteristics and the clinical outcome showed no significant difference between two groups. The loss of interbody height (p=0.001) and subsidence (p=0.035) showed statistically significant difference between group A and B. However, there were no significant difference between VAS, NDI and mJOA at the same period.
Conclusion: Although zero-P was better in radiologic assessment, overall clinical outcome did not differ between two groups, and even in the smallest case, the morbidity due to zero-P should not be ignored.
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