Ldr Medical

Sofamor S.n.c.

Istvan Hovorka

Pierre Bernard

Ferdinand De Peretti

Claude Argenson

This disclosure relates to intervertebral disc prostheses which may have an upper plate, a lower plate, and a mobile core, with the upper surface of the core being in contact with at least a part of the lower surface of the upper plate. In some configurations, limit stops reduce friction while limiting or preventing the movements of the core relative to the lower plate, in translation and in rotation, respectively, along an axis substantially parallel to the lower plate and about an axis substantially perpendicular to the lower plate. Instrumentation for insertion of the prostheses into intervertebral spaces is also described.

Intervertebral disc prosthesis

The disclosure relates to intervertebral disc prostheses, which may comprise at least three pieces including an upper plate, a lower plate, and a core mobile at least relative to the lower plate, the upper surface of the core being in contact with at least a part of the lower surface of the upper plate. Various embodiments have limit stops allowing friction to be limited, while limiting or preventing the movements of the core relative to the lower plate, in translation and in rotation, respectively, along an axis substantially parallel to the lower plate and about an axis substantially perpendicular to the lower plate, and have at least one hole disposed along the lower surface of the core facilitating sliding of the core relative to the upper surface of the lower plate with which it is in contact. Instruments for inserting intervertebral prostheses are also disclosed.

Spinal osteosynthesis device comprising, for one and the same vertebra, a hook (12), two vertebral bearing means associated with the said hook, the latter being adapted so as to be able to bear on the median portion of the vertebral posterior arch between two longitudinal rods (7) of the said device, this hook being provided with transverse means of connection (28) between the hook and the longitudinal rods, with the possibility of adjustment, in a sagittal plane from front to back and from top to bottom, and in a frontal plane from left to right, between the rods and the said hook. The hook (12) and the two anchoring screws or hooks afford three bearing points on the same vertebra, and this avoids having to equip the stage above. Moreover, this hook can be put in place, at the end of a surgical intervention, at the desired stage and at any level chosen by the surgeon, while at the same time permitting an appreciable saving in the time taken for it to be put into place compared with the earlier systems.

Growing community of inventors

Nice, France

Istvan Hovorka