Abstract
A number of interspinous devices (ISD) have been introduced in the lumbar spine implant market. Unfortunately, the use of these devices often is not associated with real comprehension of their biomechanical role. The aim of this paper is to review the biomechanical studies about interspinous devices available in the literature to allow the reader a better comprehension of the effects of these devices on the treated segment and on the adjacent segments of the spine. For this reason, our analysis will be limited to the interspinous devices that have biomechanical studies published in the literature.
Highlights
A number of interspinous devices (ISD) have been introduced in the lumbar spine implant market
The aim of this paper is to review the biomechanical studies about interspinous devices available in the literature to allow the reader a better comprehension of the effects of these devices on the treated segment and on the adjacent segments of the spine
From the review of the studies on the biomechanics of nonfusion interspinous devices available in the literature, we have focused our attention on the analysis of the following biomechanical effects: (1) influence on the range of movement (ROM) of the treated segment and of the adjacent segments, (2) influence on the size of the spinal canal area and foraminal canals area, (3) effects on the intradiscal pressure, disc load, and facet load, (4) influence on the segmental tilt and instantaneous axis of rotation (IAR) of the treated segment
Summary
A number of interspinous devices (ISD) have been introduced in the lumbar spine implant market. The interspinous devices often can be implanted in lumbar spine using a minimal or mini-invasive approach in local anesthesia This is one of the main reasons that has led to a boom of the use of interspinous devices in the last decade for a wide range of lumbar pathologies. The aim of this paper is to review the biomechanical studies about interspinous devices available in the literature to allow the reader a better comprehension of the effects of these devices on the treated segment and on the adjacent segments of the spine. For this reason, our analysis will be limited to the interspinous devices that have biomechanical studies published in the literature
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