Anterior cervical plate

摘要

An anterior cervical plate system is provided. The cervical plate includes an actuator and two locks located between two holes adapted to receive fasteners. Each lock includes a pair of fingers oppositely disposed from a fastener retaining flange. The retaining flange face the holes and the fingers face each other with the actuator located between the fingers. The actuator includes an elongated body. As the actuator is rotated from an unlocked to a locked position, the elongated body pushes both locks simultaneously outwardly to retain fasteners placed inside the holes. As the actuator is rotated in the opposite direction to an unlocked position, the elongated body catches hooks on the fingers to pull the locks inwardly away from holes. The locks are configured to prevent bone fasteners from backing out of the plate.

主权项

1. A bone plate system, comprising:
a plate having two adjacent through holes; each through hole configured to receive a bone fastener for attaching the plate to bone; an actuator located between the two through holes; the actuator having a longitudinal axis and an outer surface; in cross-section of the actuator taken perpendicular to the longitudinal axis of the actuator, the outer surface defines a shape having a length greater than a width wherein the length is defined perpendicular to the longitudinal axis of the actuator and the width is defined perpendicular to the length and the longitudinal axis; the outer surface comprising first and second opposing surface portions of the shape generally aligned with the length and third and fourth opposing surface portions of the shape generally aligned with the width; the actuator being connected to the plate such that the actuator rotates with respect to the plate; two locks movably coupled to the plate; each lock having a pair of fingers oppositely disposed from a fastener retaining flange; the fastener retaining flange of one lock being located between the actuator and one of the through holes; the fastener retaining flange of the other lock being located between the actuator and the other one of the through holes; the actuator being located between the fingers of both locks; two bone fasteners; each bone fastener having a head portion and configured for insertion into a through hole such that at least a portion of the head portion is positioned distally of the fastener retaining flange; and wherein bone plate includes an unlocked configuration in which the fastener retaining flanges are out of the pathway of the through holes to permit passage of the bone fasteners into or out of the through holes; wherein the bone plate includes a locked configuration in which the fastener retaining flanges are in the pathway of the through holes and above at least a portion of the fasteners to prevent the bone fasteners from backing out of the through holes; and wherein the actuator is movable between a locked and unlocked configuration by rotation of the actuator relative to the plate which simultaneously moves both locks between the locked and unlocked configurations.