**5. Conclusion**

Until recently, IFDs have had only biomechanical and some prospective clinic studies in evaluating their role as an adjunct to thoracolumbar fusion. However, the randomized control trial by Panchal et al. [8] showed outcomes of interspinous process fixation to be comparable and even, in some cases, more favorable to those of pedicle screw fixation. The relative ease with which a surgeon can minimally invasively implant this device combined with a relatively short operative times, low blood loss, and reduce hospital length of stay provides an attractive alternative to pedicle screw fixation.

*The Aspen MIS Spinous Process Fusion System DOI: http://dx.doi.org/10.5772/intechopen.95941*
