USING A MODULAR INTERBODY SPACER TO CREATE AN ALIF FOOTPRINT IN MIS TLIF PROCEDURE.

VLADIMIR SINKOV M.D.

ISASS JANUARY 2014 MEETING -ADVANCED COURSE AND CADAVER LAB -NAVIGATING CONTROVERSIES IN MIS (LAS VEGAS, NEVADA USA)

INTRODUCTION

To demonstrate a novel device and technique to achieve interbody fusion with a large footprint via traditional minimally invasive posterior approach using a modular interbody spacer.

METHODS

5 consecutive patients underwent minimally invasive transforaminal lumbar interbody fusion using VTI lnerfuse® modular interbody implant with percutaneous pedicle screw instrumenation between August 2012 and September 2013. All patients had significant risk factors for cage subsidence. 3 patients were morbidly obese and 2 patients had jobs that required significant heavy lifing. Length of follow up ranged between 1 year and 6 weeks.

RESULTS

All patients underwent MIS TLIF procedures without complications. No evidence of implant failure or cage subsidence was seen in any patient.

CONCLUSIONS

This is a case series report that demonsrates successful use of a novel modular implant for MIS TLIF procedures. The implant is an interbody spacer with significantly larger footprint and cumulative bone graft window volume than traditional MIS TLIF cages. Use of such implant can minimize the chance of subsidence and improve fusion rates for patients with such risk factors as obesity, poor bone quality, or for patients exposed to higher than average mechanical stresses on the interbody spacer postoperatively.

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