Rod assembly and modular rod system for spinal stabilization

摘要

A rod assembly for spinal stabilization is provided comprising a flexible tubular element having a first end section and a second end section, an adapter connected to the second end section, the adapter having an engagement structure for connection to other rod portions or other rod assemblies of a spinal stabilization device, wherein at least a portion of the adapter extends into or onto the second end section, a longitudinal core extending through the tubular element, the core having a first end extending through at least a portion of the first end section and a second end extending into the portion of the adapter and being freely movable therein.

主权项

1. A rod assembly for spinal stabilization comprising:
a flexible tubular element having a first end section, a second end section, and a flexible section between the first and second end sections, at least one of the first and second end sections having an annular shape in a cross-sectional plane perpendicular to a longitudinal axis of the flexible tubular element, the flexible tubular element being compressible from an uncompressed state to a fully compressed state; an adapter having a first end that is connectable to the second end section and a second end having a threaded engagement surface that is configured to engage and connect to a corresponding threaded engagement surface of a connectable element of a spinal stabilization device; wherein at least a portion of the first end of the adapter extends into or onto the second end section of the flexible tubular element when the adapter is connected to the second end section; and a longitudinal core extendable through the flexible tubular element, the core having a first end extendable through at least a portion of the first end section of the flexible tubular element, and a second end extendable into the portion of the adapter that extends into or onto the second end section of the flexible tubular element; wherein an end point at the second end of the core located furthest from the first end of the core along a longitudinal axis of the core is spaced apart from the adapter, such that the second end of the core is freely movable relative to the adapter along the longitudinal axis of the core when the adapter is connected to the second end section and the flexible tubular element is in the fully compressed state.