SpineJack [Neurosurgery Wiki]

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=====SpineJack=====

====Indications====
The SpineJack® System is designed for the Anatomical Reduction of Vertebral Compression Fractures type A1, A2 and A3.1 [[Magerl classification of thoracolumbar spinal fractures]], with or without underlying pathologies affecting the bone quality such as osteoporosis and malignant lesions (Myeloma or osteolitic metastasis).


The intravertebral SpineJack® implant (CE 0499) is intended on the one hand to restore a collapsed [[vertebral fracture]], and on the other to maintain this restoration until a stabilizing material is injected to permanently immobilize it. 

The SpineJack® range comes in 3 different sizes (different diameters and lengths) to adapt as effectively as possible to the three-dimensional nature of vertebral bodies
((Krüger A, Oberkircher L, Figiel J, Floßdorf F, Bolzinger F, Noriega DC, Ruchholtz S. Height restoration of osteoporotic vertebral compression fractures using different intravertebral reduction devices: a cadaveric study. Spine J. 2013 Nov 4. pii: S1529-9430(13)01216-3. doi: 10.1016/j.spinee.2013.06.094. [Epub 
ahead of print] PubMed PMID: 24200410.)).

===Vertebra dimensions===
In order to ensure an optimal fit of SpineJack® implants, a CT scan of the vertebral body prior to surgery must confirm the adequacy of the vertebral dimensions. Access to the vertebral body requires a pedicle with a minimum diameter of 5mm (diameter KE 004 + 0.8 mm 5mm)

===Implant positioning===
The placement of 2 implants is often recommended to achieve optimum anatomical restoration. However, depending on the type of fracture to be treated, the practitioner may decide to place only one SpineJack® implant.
The extent of fracture
reduction depends largely on the positioning of the implant within the vertebral body. It is therefore recommended to map the optimal placement of the implants prior to surgery.

====Results====

Height restoration was significantly better for the SpineJack® group compared to Kyphoplasty. Height maintenance was dependent on the cement volume used. The group with the SpineJack® without cement nevertheless showed better results in height maintenance, yet the statistical significance could not be demonstrated
((Krüger A, Baroud G, Noriega D, Figiel J, Dorschel C, Ruchholtz S, Oberkircher L. Height restoration and maintenance after treating unstable osteoporotic vertebral compression fractures by cement augmentation is dependent on the cement volume used. Clin Biomech (Bristol, Avon). 2013 Aug;28(7):725-30. doi:
10.1016/j.clinbiomech.2013.06.007. Epub 2013 Jul 19. PubMed PMID: 23871305.)).

====Technique====
http://www.vexim.fr/gr/wp-content/uploads/2013/03/Spinejack2.pdf