Fixation system and method for Hoffa fractures

A method of fixing a distal femur having a Hoffa fracture creating a condylar fragment, the method comprising, in any order:

• securing a main plate having an elongated body portion and a head portion to the distal femur, wherein the elongated body portion is secured to a shaft region of the distal femur, and wherein the head portion is wider than the body portion and is secured to an end region of the distal femur;
• clamping a mounting region of an outrigger plate between the head portion of the main plate and a flange of a coupling member at a rotational position selected from two or more permitted rotational positions of the mounting region, wherein the outrigger plate is shorter, narrower, and thinner than the main plate, and wherein the coupling member is disposed in threaded engagement with a first aperture defined by the head portion of the main plate and extends through a second aperture defined by the mounting region of the outrigger plate;
• and
• fastening an arm of the outrigger plate to the condylar fragment with one or more fasteners such that the outrigger plate spans and stabilizes the Hoffa fracture, wherein the arm is narrower than the mounting region;
• wherein an upper surface of the head portion of the main plate defines a series of first surface features arranged along a circumferential edge of the first aperture defined by the head portion, wherein a lower surface of the mounting region of the outrigger plate defines a series of second surface features arranged along a circumferential edge of the second aperture defined by the mounting region, and wherein a plurality of the first surface features fit together with a plurality of the second surface features in each of the two or more permitted rotational positions of the mounting region.