Systems and methods for using polyaxial plates

A bone fixation assembly for treating a fracture of a bone site, the assembly comprising:

• a bone plate having an interior surface configured to contact bone and an exterior surface, the bone plate comprising:
• a head portion configured to conform to a metaphysis of the bone, the head portion defining a first slot and having one or more polyaxial openings, and
• a shaft portion that extends from the head portion and that is generally elongated and configured to conform to a diaphysis of the bone, the shaft portion defining a second slot and having one or more polyaxial openings;
• wherein the one or more polyaxial openings each comprises an inner surface having a plurality of non-circumferential fins protruding from the inner surface.