The present disclosure is directed towards a biomechanical
implant and anterior, lateral or posterior
instrumentation construct. The construct may be of unitary or
modular construction, whereby a single molded construction can form the entire
assembly, in which case the through holes may be adapted to receive a metallic insert for
screw fixation; or alternatively be of a
modular construction wherein the anterior / lateral
instrumentation and intervertebral spacer are designed for removable locking engagement, one with the other, for
insertion by the surgeon as a unitary construct. A unique feature of the construct resides within the
instrumentation construction, whereby a single opening formed therein permits two
bone screws, or the like
fastener device, to be positioned within both the superior and inferior vertebral bodies surrounding the spacer
implant, or, for example in the case of a
corpectomy or diskectomy with cage
insertion, wherein two screws can be fixed within a single
vertebral body through a single through hole, and wherein the
bone screws are constructed and arranged to cooperate with the retention plate so as to provide locking engagement, one to the other, with the retention plate, upon final fixation thereof. Screw retention elements of alternative shape, based upon the choice of vertical or
horizontal orientation, based upon an opened figure eight design, are provided for
insertion in a groove formed in the borehole of the instrumentation plate which allows insertion of each fixation element but will prevent a loosened fixation element from falling out of the plate.