Abstract
The DIAM (Device for Interspinous Assisted Motion) interspinous device offers the possibility of a viscoelastic supplementation of the lumbar motion segment with a small, reversible operation. It is intended as a restabilisation procedure after a discectomy to avoid facet joint overload and as a topping of procedure for the segment adjacent to a fusion. The device has been on the German market since 2004. There are several biomechanical studies available showing an effect mainly in extension and flexion, but hardly any in rotation and lateral inclination. Despite frequent clinical use, there have only been a few, mainly retrospective clinical studies indicating the success of the implant; however, sound scientific data are missing. Several prospective, randomised, controlled studies are now underway to fill that gap. Only then will it be possible to assess whether this implant is of true value to improve clinical results and to slow down the degenerative cascade or not.
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