What is the efficacy of the Stryker SpineJack system in the treatment of osteoporotic vertebral fractures?

Updated: Nov 12, 2019
  • Author: Gaurav Gupta, MD; Chief Editor: Justin A Siegal, MD  more...
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Even after balloon kyphoplasty, osteoporotic compression fractures have a high rate of continued collapse with subsequent loss of height and the development of angulation and deformity. This appears to increase the risk for adjacent level fractures. The SpineJack system (Stryker Corp, Kalamazoo, MI) consists of bilateral expandable titanium implants supplemented with bone cement. This system provides more symmetric and balanced lateral and anterior support, and requires lower volumes of bone cement compared to balloon kyphoplasty. Using this system, clinicians can now achieve better pain control, restore vertebral body height, restore spinal alignment, and reduce the risk of adjacent level fractures.

One important advantage of SpineJack kyphoplasty over standard balloon kyphoplasty or vertebroplasty is the ability to perform kyphoplasty safely in patients with mild–moderate retropulsion of the posterior endplate without neurological compromise. In certain situations, the SpineJack device has been used to elevate the fractured endplates serving to reduce the retropulsed bone fragment. In circumstances where patients have a retropulsed bone fragment, SpineJack is superior for the aforementioned reason. Retropulsed bone fragments are a relative contraindication to balloon kyphoplasty.

This finding was noted in the SAKOS study, which directly compared SpineJack kyphoplasty versus balloon kyphoplasty and showed that SpineJack patients had better pain reduction at 1 month and 6 months post treatment. The SAKOS study also showed that SpineJack is associated with a reduced incidence of adjacent level fractures. [13]

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