Counter-torque implant

A bone plate system configured to immobilize a first bone portion and a second bone portion separated from the first bone portion so that a gap that extends from the first bone portion to the second bone portion along a longitudinal direction is crossed by a hole formed in the first bone portion and the second bone portion, the hole open to the gap, the bone plate system comprising:

• a clip;
• a first fastener;
• a second fastener;
• and
• a bone plate having a bone-facing side, an obverse side displaced from the bone-facing side by a thickness of the bone plate, a first end and second end displaced from the first end along a longitudinal length of the bone plate that extends along the longitudinal direction, and first and second sides opposite each other along a width direction of the bone plate that is perpendicular to each of the longitudinal direction and the thickness, the bone plate comprising 1) a plug extending out from the bone-facing side, the plug longer along the longitudinal direction than in the width direction, the plug having bone engagement surfaces that are opposite each other along the width direction and configured to span the gap and extend into the hole, such that the bone-engagement surfaces engage the first and second bone portions so that the plug absorbs torsional forces across the gap, and 2) first, second, third, and fourth fastener holes extending from the bone-facing side to the obverse side, wherein the second and third fastener holes are disposed between the first and fourth fastener holes, the plug is disposed between the second and third fastener holes;
• wherein the second and third fastener holes are configured to receive first and second bone engaging members of the clip, respectively, that are positioned to be driven into different ones of the first and second bone portions,
• wherein the first and fourth fastener holes are configured to receive different ones of the first and second fasteners so as to secure the bone plate to the first bone portion and the second bone portion such that the bone plate spans the gap and the plug resides in the hole, and
• wherein the plug comprises 1) a body comprising a first width along the longitudinal length;
• 2) a neck portion that joins the body with the bone-facing side, the neck portion having a second width along the longitudinal length, and 3) a tip portion extending away from the bone-facing side, wherein the neck portion is formed as a waist such that the second width is less than the first width.

A bone plate system comprising:

• a bone plate having a bone-facing side, an obverse side displaced from the bone-facing side by a thickness of the bone plate that extends along a transverse direction, a first end, and second end displaced from the first end along a longitudinal length of the bone plate that extends along a longitudinal direction, the bone plate comprising:
• a first fastener hole extending through the bone plate between the bone-facing side and the obverse side, closer to the first end than the second end;
• a second fastener hole extending through the bone plate between the bone-facing side and the obverse side along a respective central axis of the second fastener hole, wherein the second fastener hole is closer to the first end than the second end;
• a third fastener hole extending through the bone plate between the bone-facing side and the obverse side along a respective central axis of the third fastener hole, wherein the third fastener hole is closer to the second end than the first end;
• a fourth fastener hole extending through the bone plate between the bone-facing side and the obverse side, closer to the second end than the first end, wherein the second and third fastener holes are disposed between the first and fourth fastener holes;
• and
• a tab that extends out from the bone-facing side of the bone plate at the web, the tab having a rectangular shape,
• wherein the second fastener hole has a first round receiver portion having a first width and a first channel that is elongate along the longitudinal direction from the first round receiver portion toward the third fastener hole, and the first width is greater than a second width of the first channel,
• wherein the third fastener hole has a second round receiver portion having a second width and a second channel that extends from the second round receiver portion toward the second fastener hole, and the first and second channels terminate so as to define a web of the bone plate that extends between the second and third fastener holes, wherein the second width is greater than a width of the second channel, and
• wherein the first and second widths and the widths of the first and second channels are perpendicular to each of the transverse direction and the longitudinal direction.