Bone plate system and method

摘要

A bone plate system for securing a plurality of bones is provided including a plate member, a locking device of the bone plate, and a surgical cable having a trailing end for being connected to the bone plate and a leading end for being advanced around the bones and into the locking device. The surgical cable may be tensioned to approximate the bones, urge the bones together, and seat the bone plate against the bones. The locking device may be reconfigured to a locked configuration to fix the bone plate to the surgical cable. The bone plate further includes a plurality of throughbores for receiving bone anchors that rigidly fix the bone plate to the bones. The bone plate system utilizes the tensile strength of the surgical cable and the rigid fixation between the bone anchors and the bone plate to resist relative movement of the bones.

主权项

1. A bone plate system for stabilizing bone portions, the system comprising:
a bone plate having a longitudinal axis and a pair of opposite bone-engaging surfaces; a cable configured to be looped around the bone portions and connected to the bone plate; opposite halves of the bone plate that are laterally spaced from each other and include laterally outer portions defining a maximum lateral width of the bone plate, the bone plate halves being oriented to extend transversely to each other so that one of the bone-engaging surfaces of the bone plate has a generally convex curvature about the longitudinal axis and the other of the bone-engaging surfaces of the bone plate has a generally concave curvature about the longitudinal axis, the bone plate halves being configured for engaging a bone portion on either side of an incision that separates the bone portions; throughbores of the bone plate halves for receiving bone anchors for anchoring the bone plate halves in engagement with the bone portions, the throughbores including laterally outer throughbores on opposite sides of the bone plate longitudinal axis; a locking device of the bone plate that interconnects and extends laterally between the spaced bone plate halves and resists relative movement therebetween, the locking device having an unlocked configuration which permits the cable to be shifted relative to the bone plate and a locked configuration which fixes the cable to the bone plate; a tubular member of the locking device having a through aperture sized to receive the cable therethrough with the aperture having a central axis extending straight through the aperture along which the cable may be advanced with one of the generally convex or concave bone-engaging surfaces of the bone plate positioned against the bone portions; a pair of longitudinal portions of the bone plate spaced apart by the tubular member and connecting the tubular member to the bone plate halves; and laterally outer surfaces of the longitudinal portions disposed laterally inward from the outer throughbores of the bone plate halves so that the longitudinal portions have a lateral width thereacross that is less than the maximum lateral width of the bone plate.