A fracture fixation system in which a plate is secured to stable bone andposts are inserted at varying angles into an unstable bone fragment byengaging in rotatable bearings which are fixedly secured in the plate when theposts are fully engaged in the bone fragment. The bearings are formed astruncated spherical members having a number of longitudinal slots extendingpartway along the length of the bearing to form petals which are expandedoutwardly when the posts are advanced in the bearing to produce non-uniformdistribution of forces between the bearing and the plate which generate forcecouples to resist angulation of the posts and loss of fracture fixation.Various other ways of producing non-uniform force distribution are described.
