An intervertebral implant includes a body having an upper surface, a lower
surface and a transverse fastener hole. The body includes a dynamic
fixation mechanism for seating a fastener in the fastener hole and
translating the fastener relative to the implant to accommodate
subsidence of the implant. In one embodiment, an implant includes a
transverse slot with an elongated seat for translating a seated fastener
relative to the implant. In another embodiment, an implant includes a
displaceable sliding member for translating a fastener relative to the
implant.