Bone anchor configured to anchor an elongated implant to a patient bone

摘要

A tool set for implanting a rod in a human spine in conjunction with bone screws. The tool set includes a pair of end guide tools that receive opposite ends of the rod in channels and under manipulation by a surgeon facilitate transport of the rod toward the bone screws attached to the guide tools. Intermediate guide tools having guiding pass through slots are utilized to guide intermediate locations along the rod toward associated bone screws. An attachment structure operably connects the guide tools to the bone screws. The guide tools each include a lower guide and advancement structure to allow a closure top with mating structure to be rotated and driven downward against the rod and to cooperate with similar structure in the bone screw to seat and lock the rod therein. A method utilizing the tool set allows a surgeon to percutaneously implant the rod in the patient.

主权项

1. A bone anchor to anchor an elongated implant to a patient bone and threadably engage with a closure plug, the bone anchor further to couple with a tool comprising an attachment structure, the bone anchor comprising:
an anchoring member comprising a distal portion and a proximal portion opposite the distal portion, the distal portion to attach to the patient bone in an anchoring manner; and a head coupled to the proximal portion of the anchoring member, the head to couple to the elongated implant, the head comprising:
a proximal end and a distal end opposite the proximal end, the proximal portion of the anchoring member extending into the distal end such that the head is coupled to the proximal portion of the anchoring member;a first arm and a second arm spaced apart from the first arm to define a channel to receive the elongated implant to couple the head to the elongated implant, the channel extending distally from the proximal end;a helically wound thread defined in an inner surface of the channel, the inner surface facing radially inward towards a longitudinal center axis of the head, the helically wound thread to threadably engage with the closure plug when the closure plug is received in the channel;an outer surface facing radially outward relative to the longitudinal center axis of the head, the outer surface being on the first arm; and a horizontal radiused slot near the proximal end of the head and extending along at least a portion of the outer surface in a direction perpendicular to the longitudinal center axis of the head, the slot to receive the attachment structure when the bone anchor is coupled to the tool; and wherein the horizontal radiused slot comprises a proximal boundary comprising a radially inner extent and a radially outer extent radially outward of the radially inner extent, wherein the radially outer extent is distal the radially inner extent.