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SpineJack

SpineJack – Anatomical Restoration

SpineJack offers surgeons a controlled and minimally invasive solution to treat vertebral compression fractures. It allows a safe anatomical restoration and following stabilization of the vertebra.

SpineJack is available with three different sizes for the best possible three-dimensional adaptation to the anatomy of the vertebral bodies.

As for any other weight-bearing joint, spine fractures deserve to be treated by a stable anatomical reduction and a stabilization. These both steps combined allow for a biomechanical restoration due to an early mobilization and weight bearing. Anatomical reduction means restoration of the geometry of the whole vertebra, that is cortical ring and endplates.

  • Cortical ring reduction consists of vertebral angle restoration which is the key for kyphosis management and consecutive adjacent fracture avoidance
  • Vertebral endplate restoration has been described as having a positive influence on disc creeping, disc degeneration, compensatory curvatures or facet joint arthritis.

Pre- and postoperative profile view of an A.3.1 fracture by Dr. med. Ardura after treatment with SpineJack, measurement with 3D modelling of CT scans; Endplates: Warm colours indicate areas of strong anatomical restoration

How does SpineJack work?

The titanium-alloy implant is introduced transpedicular. The following cranio-caudal expansion of SpineJack achieves the controlled restoration of the sagittal angle and the endplates without ante-pulsion or retropulsion of the fragments.

This restoration of the vertebral height and the endplates is maintained until the vertebra is stabilized by highly viscours bone cement.

The resoration of the vertebra can be precisely measured by 3D-reconstruction as well as pre- and post-operative CT scans. The level of restoration is visualized by a color code.

Promising longterm results

First clinical Studies indicate a lower rate of adjacent fractures, compared to traditional methods.

Several clinical and epidemiological studies have shown a correlation in between vertebra deformation and clinical problems such as post-traumatic kyphosis, which has been depicted as one of the most potentially serious post-traumatic deformities. A SpineJack treatment can relieve patients mostly from this pain.

Within this context, VEXIM has designed the SpineJack implant to provide clinicians with a fully controlled solution for VCF treatment enabling first an anatomical reduction and second a safe stabilization.

 What are the advantages?

The SpineJack system is indicated for use in the reduction of mobile spinal fractures that may result from osteoporosis, trauma fractures types A according to the Magerl classification and malignant lesions myeloma or osteolitic metastasis.

The SpineJack system is intended to be used in combination with validated bone cement, and to be placed, using a transpedicular approach, through a vertebra pedicle with a minimum internal diameter, as verified with a pre-operative CT scan.

  • Controlled cranio-caudal expansion
  • Maintenance of the restoration before cement injection
  • Preservation of bone trabeculae

Literature

The SpineJack technique is well documented in published studies in highly respected scientific journals with focus in all type of indications leading to vertebral fractures.

1 Oner F.C. & al. Changes in the disc space after fractures of the thoracolumbar spine – Journal of bone & joint surgery,1998
2 Oda I. & al. Does spinal kyphotic deformity influence the biomechanical characteristics of the adjacent motion segments – Spine, 2000
3 Schlaich C. & al. Reduced pulmonary function in patients with spinal osteoporotic fractures – Osteoporos Int, 1998
4 Lombardi I. & al. Evaluation of pulmonary function and quality of life in women with osteoporosis – Osteoporos Int, 2005
5 Yang H.L & al. Changes of pulmonary function for patients with osteoporotic vertebral compression fractures after kyphoplasty – Journal of Spinal Disorders & Techniques, 2007
6 Tzermidianos MN et al. Altered disc pressure profile after an osteoporotic vertebral fracture is a risk factor for adjacent vertebral body fracture – European Spine Journal, 2008
7 Wang XY et al. Kyphosis recurrence after posterior short-segment fixation in thoracolumbar burst fractures – Journal of Neurosurgery Spine (JNS), 2008
8 Kerttula L.I. & al. Post-traumatic findings of the spine after earlier vertebral fracture in young patients: Clinical and MRI study – Spine, 2000
9 Cinotti G. & al. Degenerative changes of porcine intervertebral disc induced by vertebral endplates injuries – Spine, 2005
10 Brinckmann P. & al. The influence of vertebral body fracture, intradiscal injection, and partial discectomy on the radial bulge and height of human lumbar discs – Spine, 1985
11 Malcolm BW et al. Post-traumatic Kyphosis. Journal of Bone and Joint Surgery (Am) 1981
12 Whitesides TE. Traumatic kyphosis of the thoracolumbar spine. Clin. Orthop. 1977

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