A vertebral column construct (200) for stabilizing a segment of a vertebral column can include first, second and third plate segments (220 a-c), and a spring (230) connected between adjacent plate segments. The spring can be adapted and configured to provide a predetermined preload between the plate segments. Such a preload can advantageously enhance fusion across a bone graft. Alternatively, the spring can be adapted and configured to resist, by a predetermined degree, loading between the plate segments. A cam (261) can be provided on one of the first and third plate segments, wherein engagement between the cam and the cam surface prevents dynamic connection between the plates. The cam can be adapted and configured to adjust a preload applied between segments, such as by adjusting tension in the spring.
