An expandable medical implant for supporting bone structures is disclosed.
The implant may include an outer member and an inner member receivable in
the outer member. One of the outer and inner members includes a tapered
surface and the other of the outer and inner members includes a scalloped
surface. The implant may also include a locking element disposed between
the tapered surface and the scalloped surface. The tapered surface may be
movable relative to the locking element to transversely shift the locking
element into engagement with the scalloped surface to inhibit a decrease
in the overall implant height.