Controversies about Interspinous Process Devices in the Treatment of Degenerative Lumbar Spine Diseases: Past, Present, and Future

<table>Intraoperative image of the first generation (prototype) all titanium Ellipse device. In this case the supraspinous ligament was removed to check the appropriate distraction of the interspinous area.</table>

BioMed Research International

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Figure 8

Figure 8: Controversies about Interspinous Process Devices in the Treatment of Degenerative Lumbar Spine Diseases: Past, Present, and Future 