Vertebral rods and methods of use

摘要

The present application is directed to vertebral rods and methods of use. In one embodiment, the rod includes upper and lower sections that are separated by an intermediate section. The intermediate section may include one or more members, and may have a variety of configurations. An elastic member may be positioned within the intermediate section. The intermediate section and the elastic member may provide for variable resistance during movement of the upper and lower sections. In one embodiment, the resistance increases the further away the upper and lower sections move from a first orientation.

主权项

1. A vertebral rod assembly comprising:
a first rod section defining a longitudinal axis; a second rod section spaced from and coaxial with the first rod section, the sections each having a circular cross sectional shape; an intermediate section attached to each of the rod sections, the intermediate section defining a first portion of a pocket, the first portion of the pocket having a concave inner surface and being offset from the longitudinal axis; and an elastic bumper removably disposed in the pocket such that the elastic bumper engages the concave inner surface, wherein the intermediate section and the elastic bumper are configured to provide variable resistance to movement of the first and second sections.