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Nonunion of the Proximal Ulna
Nonunion of the proximal ulna is uncommon. Like most fractures, a proximal ulnar fracture is considered a nonunion if it exhibits no clinical or radiographic signs of union after 6 months postinjury. Nonunion is often recognized in the setting of hardware loosening or breakage. A nonunited proximal ulnar fracture can be painful and unstable. The goals of surgery are to achieve bony union, a stable ulnohumeral joint, and proper forearm alignment. This chapter presents the indications and contraindications for surgical treatment of proximal ulnar nonunions. Outcomes from the literature, surgical tactics, and strategies for avoiding pitfalls and complications of surgical treatment are also described.