Palmar Plate Fixation in Scaphoid Nonunions-Surgical Technique and Review of the Literature.

Even today, the treatment of scaphoid nonunions remains challenging for the treating hand surgeon. Considering the biomechanical principles of wrist kinematics, especially the three-dimensional movement of the scaphoid, it is evident that a single headless compression screw does not provide sufficient stability to counteract all these forces, particularly rotational forces. Palmar plate fixation was initially introduced as a salvage procedure after failed screw fixation. It ensures very high rotational stability but also supports correction of the humpback deformity, reconstruction of scaphoid length, and prevents bone graft extrusion. However, indications have since been extended to include primary nonunion treatment in cases with humpback deformity or comminuted fractures. Even in recalcitrant cases (substantial bone loss, prior surgery failure, avascular necrosis, or durations exceeding 2 years), high union rates and favorable functional outcomes have been reported. This article attempts to summarize the biomechanical principles, indications, surgical techniques, and results following palmar angular stable plate fixation in scaphoid nonunions.