Rod attachment assembly for occipital plate

摘要

The present disclosure relates, according to some embodiments, to orthopedic implantable device technology, and more specifically to implantable devices for use in stabilizing the occipitocervical junction and the cervical spine. For example, the disclosure relates to embodiments of an implantable orthopedic assembly generally comprising an occipital plate and one or more repositionable clamping assemblies for securing a stabilizing rod at a nonzero distance from a plate surface. One or more rails may extend laterally from a plate to support a clamping assemblies.

主权项

1. An implantable orthopedic assembly comprising:
an occipital plate comprising a top surface and a bottom surface, the bottom surface of the occipital plate adapted for securing to an occiput; at least one rail extending laterally from a proximal portion of the occipital plate, the at least one rail comprising a top surface and a bottom surface; at least one repositionable rod attachment assembly adapted to enclose a portion of the at least one rail, the rod attachment assembly further adapted for securing a portion of a stabilizing rod at a distance from the at least one rail, the rod attachment assembly comprising:
a slide body comprising a rail aperture adapted to frictionally contact at least one surface of the at least one rail, the slide body further adapted for lateral repositioning between a first rail position and a second rail position;a saddle body adapted for repositioning between a first rotational position and a second rotational position, the saddle body further adapted to receive the portion of the stabilizing rod;a retention ring positioned on an outside circumference of a circumferential recess in the saddle body and on an inside circumference of the slide body, the retention ring adapted to secure the saddle body to the slide body; anda pressure cap comprising a rod contacting surface at a first side and an outwardly extending flange at a second side distal to the first side, the pressure cap adapted to maintain alignment between the received stabilizing rod and the saddle body and transfer an immobilizing force from the received portion of the stabilizing rod to the top surface of the at least one rail, the immobilizing force immobilizing the rod attachment assembly at a fixed rail position and in a fixed rotational position; and a loading component positioned between the pressure cap and the saddle body of the at least one repositionable rod attachment assembly, wherein the loading component is in contact with the outwardly extending flange of the pressure cap, the loading component adapted to exert a bias on the pressure cap against the at least one rail to stabilize the at least one repositionable rod attachment assembly at an adjustable rail position and in an adjustable body position.