Flexible fastening device

Abstract

Flexible fastening device designed to interlock a longitudinal element ( ) and an osseous anchor device ( ), either internal, in particular vertebral, or external, the anchor device ( ) comprising an intra-osseous part and an extra-osseous part ( ) associated to a tightening device ( ), the fastening device ( ) comprising a first connection part ( ) and a second connection part ( ) designed to receive the extra-osseous part ( ) of the anchor device ( ), and an intermediate part ( ) joining the first and second connection parts ( ) and designed to encircle tightly the longitudinal element ( ), the flexible fastening device ( ) comprising a strand ( ) out of elastic material or of material in the process of phase transformation, and the intermediate part ( ) comprising at least one spiral coil ( ) adapted to encircle the longitudinal element ( ), so that a bringing closer of the first and second connection parts ( ) by the tightening device ( ) or by the effect of the phase transformation of the strand ( ) to memory material reduces the diameter of the spiral coil ( ) to ensure the translational and rotational blocking of the longitudinal element ( ).