Patent ID: 8840677

Claim:
An implant configured to be positioned into bone tissue, the implant comprising: a member, at least a portion of the member comprising allograft, the member adapted for insertion into the bone tissue, the member having a distal end, a proximal end spaced from the distal end along a central axis, an intermediate portion extending between the distal end and the proximal end, the implant defining a hollow cavity extending into the member at the proximal end, the hollow cavity extending along the central axis from the proximal end into the intermediate portion and toward the distal end, the member further defining an outer surface that extends from the proximal end to the distal end and is monolithic with each of the proximal end and the distal end, the member defining a plurality of recesses that each: 1) is disposed at least partially within the intermediate portion, 2) extends from the outer surface toward the hollow cavity, and 3) is spaced from adjacent ones of the plurality of recesses, the outer surface defining a cross-sectional dimension measured along a direction perpendicular to the central axis from the outer surface to the central axis; wherein at least a portion of the member is at least partially demineralized, and at least a portion of the outer surface is expandable along the direction away from the central axis, such that the cross-sectional dimension of the member at the intermediate portion measured from a first location into the hollow cavity to the central axis is greater than the cross-sectional dimension at each of the proximal end and the distal end, the first location being located on the outer surface in the intermediate portion between adjacent ones of the plurality of recesses.