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Radiological analysis of 37 segments in cervical spine implanted with a peek stand-alone device, with at least one year follow-up

BACKGROUND: High incidence of subsidence in cervical stand-alone cages was reported in the literature. PURPOSE: The goal of this study was to assess the radiological outcomes of a PEEK anchored stand-alone cage (MC+(R)) with a minimum of 1 year follow-up. STUDY DESIGN: A retrospective radiological evaluation. PATIENT SAMPLE: The study was conducted in 4 hospitals and involved 28 patients (37 levels) treated by ACDF (Anterior Cervical Discectomy and Fusion) for spondylotic radiculopathy and/or myelopathy. OUTCOME MEASURES: We analyzed fusion, disc height, cage or anchor micro plate migration, discal and segmental lordosis and subsidence. METHODS: All the patients were controlled at least one year after surgery with an average of 31 months. Antero-posterior and lateral X-rays were performed pre-operatively, immediate post-operatively, and at final follow up. The different radiographic measurements were performed with the assistance of software (SpineView(R)). CT-scans were performed for each case at final follow-up to assess the fusion. RESULTS: No migration or breakage was reported for either the cage or the anchor micro plate. The fusion rate was 94.1% at the final follow-up. No subsidence was observed. The disc height increased between preop and final follow-up from 23.3% to 44.3%, from 22.1% to 35.1% and from 38.3% to 51.5% for anterior, posterior and midline disc height respectively. Mean Functional Spinal Unit Lordosis increased from 0.9 degrees preop to 3.0 degrees at final follow-up. No new kyphotic situation could be noticed. At the final follow-up, 96% of the patients stated they would undergo the procedure again. CONCLUSION: With a high rate of proven fusion, restoration of disc height and spinal alignment in most cases, and absence of subsidence or migration, our radiological results with MC+(R) at more than 1 year of follow-up show the implanted device to be safe and effective for use in treating degenerative conditions of the cervical spine

Keywords : Adult,Aged,analysis,Analysis of Variance,Cervical Vertebrae,diagnostic imaging,Diskectomy,etiology,Female,Follow-Up Studies,France,Hospitals,Humans,Incidence,instrumentation,Internal Fixators,Lordosis,Male,methods,Middle Aged,Neurosurgery,Patients,Radiculopathy,Radiography,Retrospective Studies,Software,Spinal Fusion,Spine,surgery,Treatment Outcome,, Analysis37,Segments, frozen shoulder and driving

Date of Publication : 2010 Dec

Authors : Dufour T;Huppert J;Louis C;Beaurain J;Stecken J;Aubourg L;Vila T;

Organisation : Neuro-surgery Department, University Hospital, Orleans, France

Journal of Publication : Br J Neurosurg

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/20632875

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Radiological analysis of 37 segments in cervical spine implanted with a peek stand-alone device, with at least one year follow-up | Colic ureter

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