Methods for treating a defect in the annulus fibrosis

Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone

Reexamination Certificate

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Reexamination Certificate

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10630445

ABSTRACT:
Methods and apparatus for treating disc herniation provide a conformable device which assumes a first shape associated with insertion and a second shape or expanded shape to occlude the defect which typically follows partial discectomy. The device may take different forms, including patches sized to cover the defect, plugs adapted to fill the defect, or a mesh screen collapsed into an elongated form for the purposes of insertion, thereby minimizing the size of the requisite incision while avoiding delicate surrounding nerves. Such a configuration also permits the use of instrumentation to install the device, including, for example, a hollow tube or sheath adapted to hold the collapsed screen and a push rod to expel the collapsed device out of the sheath for use in occluding the disc defect. A device may further include one or more anchors to assist in permanently affixing the device with respect to the defect.

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