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Background: The human scaphoid bone is one of the carpal bones of the wrist. Its fracture is the most common type of carpal bone fracture. Scaphoid nonunion is a well-known and common problem. Both clinical and biological factors contribute to the development of nonunion. Several techniques of bone grafting have been used in the management of scaphoid fracture nonunion. The union rate achieved with standard nonvascularized bone grafts was poor, especially in case of avascular necrosis and pseudarthroses, whereas the use of vascularized bone grafts results in better union rates. Pronator quadratus pedicled bone graft is described as one of the successful techniques that treat delayed union of the scaphoid fracture. Objective: To evaluate the outcomes and results of pronator quadratus muscle pedicle bone graft for patients who were suffering from delayed union or nonunion of scaphoid bone fracture. Patients and Methods: Ten patients suffering from delayed and non-united scaphoid fractures, seven males and three females, aging from 17 to 54 years old. We used the pronator quadratus muscle pedicled bone graft to treat all these patients. Results: Complete union was achieved in seven patients, 6 patients of them were suffering from waist non united scaphoid fracture, and one patient of four patients suffering from non-united proximal pole scaphoid fracture. Conclusion: The use of the pronator quadratus pedicled bone graft in delayed union of the scaphoid waist fractures achieved a high rate of union with excellent and good functional outcomes. A poor result occurred on using the pronator quadratus pedicled bone graft in delayed union of the scaphoid proximal pole fracture.

PRONATOR QUADRATUS MUSCLE PEDICLED BONE GRAFT FOR DELAYED UNION SCAPHOID