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Lumbar Segmental Instability Treated By Expandable Spinal Spacer In PLIF

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Author(s): Yassir Hussain .P

Journal: Journal of Orthopaedics
ISSN 0972-978X

Volume: 1;
Issue: 3;
Date: 2004;
Original page

Keywords: Expansile spinal cages | Lumbar segmental instability | PLIF | minimally invasive

ABSTRACT
Lumbar segmental instability ( LSI) is commonly treated with PLIF using conventional cages supported with posterior instrumentation which requires extensive tissue dissection and removal of lamina, ligaments and facet joints- which are posterior stabilizing structures. It also needs dural retraction to make way for the large cages which are introduced through the posterior aspect. So there is increased risk of dural laceration and neural damage. The conventional cages often need posterior instrumentation. There has always been a quest for minimally invasive spinal spacers which can be used as a stand alone implant. The new Expansile Spinal Cages (ESC) requires little or no removal of the lamina and less of dural retraction. At the time of insertion the cage is only 5 mm in size and at the end of expansion it is 15 mm in size. Since it is only 5 mm at the time of insertion most of the posterior structures are kept intact. The fins of the system pierces the end plate and gets anchored to the vertebral body-stabilizing them. The remaining space is filled with bone graft – minced iliac crest graft. The whole construct acts as a stand alone cage.
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