Patent ID: 8518115

Claim:
A porous containment device for implantation in an interior volume of a targeted vertebral body, the porous containment device comprising an outer surface defining an interior cavity for receiving a bone filler material; the porous containment device further including: a proximal portion, a distal portion and a central portion located between the proximal and distal portions, the central portion having a smaller diameter relative to the proximal and distal portions; wherein the porous containment device is expandable from an insertion configuration to an expanded configuration via injection of a bone filler material into the interior cavity of the porous containment device; and wherein the outer surface of the central portion of the porous containment device is configured to enable a portion of the bone filler material to flow out of or through the outer surface of the central portion of the porous containment device so that, in situ when in the expanded configuration, the bone filler material is directionally secreted into a buffered zone between the proximal portion and the distal portion such that the bone filler material is semi-contained in the buffered zone, and the secreted bone filler material interdigitates with bone tissue in the interior volume of the targeted vertebral body.