الفهرس 
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Abstract
The aim of our study was to identify the incidence of occurrence of distal ulnar fractures among patients with distal radius fractures admitted at El Hadra University Hospital and to assess the functional outcome after operative or conservative management of distal ulna fractures.
The study incorporated 346 patients with distal end radius fractures, among them 173 patients who had distal ulnar fractures combined with distal end radius had been followed up at least 6 months. The patients ranged in age from 19 to 87 years old, with the mean age of 48.79±15.62; 80 patients were males (46.2%) and 93 patients were females (53.7%).
In this study, the incidence of occurrence of distal ulnar fractures among distal radius fractures was 50%. According to AO DER fracture types, the most common type was type A, In total cases, 211 patients had type A (61%), 102 patients had type B (29.5%) and 33 patients had type C fractures (9.5%) while in cases with distal ulnar fractures associated with distal radius fractures, 86 patients had type A (49.7%) and 64 patients had type B (37%) and 23 patients had type C fractures (13.3%).
Among 211 cases of type A DER fractures, 86 patients had associated distal ulnar fractures (40.7%), among 102 patients of type B, 64 had associated distal ulnar fractures (62.7%) and among 33 cases of type C, 23 patients had associated distal ulnar fractures (69.7%). The incidence of occurrence of distal ulnar fractures among DER fractures increases with the type of DER fractures. It is higher in type C and lower in type A fractures.