Anti-infective spinal rod with surface features
Mechanical modifications to a spinal rod that will enable the rod to accept various coating technologies in such a way that the spinal construct's biomechanical performance is not compromised. These modifications preserve construct biomechanics in the presence of a coating and increase the bactericidal payload of an anti-infective spinal rod coating.
1. A spinal stabilization system for use in a human spine, comprising:
a) a bone anchor having a recess for receiving a rod,
b) a spinal rod having a first end portion, wherein the first end portion of the spinal rod is received in the recess of the bone anchor, and
c) a first foil disposed between the rod and the recess of the bone anchor,
wherein the first foil comprises an anti-microbial agent,
wherein the first foil comprises perforations, and the anti-microbial agent is present in the perforations.
2. The system of claim 1 wherein the first foil has a first surface, and the anti-microbial agent is present as a coating on the first surface of the foil.
3. The system of claim 1 further comprising:
d) a second foil disposed between the rod and the recess of the bone anchor,
wherein the second foil comprises an anti-microbial agent.