A Novel Nonpedicular Screw-Based Fixation in Lumbar Spondylolisthesis

The authors present the clinical results obtained in patientswho underwent interspinous fusion device (IFD) implantation

following posterior lumbar interbody fusion (PLIF). The purpose of this study is investigating the feasibility of IFD with PLIF

in the treatment of lumbar spondylolisthesis. Methods. Between September 2013 and November 2014, 39 patients underwent

PLIF and subsequent IFD (Romeo2 PAD, Spineart, Geneva, Switzerland) implantation. Medical records of these patients were

retrospectively reviewed to collect relevant data such as blood loss, operative time, and length of hospital stay. Radiographs and

clinical outcome were evaluated 6 weeks and 12 months after surgery. Results. All 39 patients were followed up for more than one

year. There were no major complications such as dura tear, nerve injuries, cerebrospinal fluid leakage, or deep infection. Both

interbody and interspinous fusion could be observed on radiographs one year after surgery. However, there were 5 patients having

early retropulsion of interbody fusion devices. Conclusion.The interspinous fusion device appears to achieve posterior fixation and

facilitate lumbar fusion in selected patients. However, further study is mandatory for proposing a novel anatomic and radiological

scoring system to identify patients suitable for this treatment modality and prevent postoperative complications.