Anterior Lumbar Interbody Implants: Importance of the Interdevice Distance

Object. The implantation of interbody fusion cages allows for the restoration of disc height and the enlargement of the neuroforaminal space. The purpose of this study was to compare the extent of subsidence occurring after conventional cage placement compared to a novel wider cage placement techniq...

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Bibliographic Details
Published in:Advances in Orthopedics 2011-01, Vol.2011 (2011), p.14-18
Main Authors: Schuler, Thomas C., Martin, Marcus M., Copay, Anne G., Subach, Brian R.
Format: Article
Language:English
Subjects:
Clinical Study
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Summary:Object. The implantation of interbody fusion cages allows for the restoration of disc height and the enlargement of the neuroforaminal space. The purpose of this study was to compare the extent of subsidence occurring after conventional cage placement compared to a novel wider cage placement technique. Methods. This study is a retrospective evaluation of radiographs of patients who underwent stand-alone single level anterior lumbar interbody fusion with lordotic titanium cages and rhBMP-2. Fifty-three patients were evaluated: 39 patients had wide cage placement (6 mm interdevice distance) and 14 had narrow cage placement (2 mm interdevice distance). Anterior and posterior intervertebral disc space heights were measured post-operatively and at follow-up imaging. Results. The decrease in anterior intervertebral disc space height was 2.05 mm versus 3.92 mm (P
ISSN:2090-3464
2090-3472
2090-3472
DOI:10.4061/2011/176497