Tandem rod connectors and related methods

摘要: Connectors are disclosed herein that can be used to attach a rod bone anchor assembly is already occupied by separate rod. Various ways of attaching the connector disclosed, including arrangements in which locked anchor, constrained one or more degrees freedom relative adjustable and include spherical articulation joint. In some embodiments, attachment aided with use positioner. The geometry selected minimize offset between first received second connector, for example using an angled curved recess and/or fastener, set screw, from center anchor. configured align rods common coronal plane, position anterior posterior than other