Dorsal percutaneous screw fixation of delayed or nonunion of scaphoid fractures: Decision making with MRI

摘要

Purpose: The purpose of the present study is to evaluate scaphoid delayed fractures or nonunions treated by percutaneous fixation with MRI correlations. Methods: We evaluated 33 consecutive scaphoid delayed unions or nonunions treated by dorsal percutaneous fixation at a mean 16 months (range, seven to 48 months) after the operation. There were 31 male and two female patients with an average age of 29 years (range, 25-33 years). Results: Pre-operative MRI revealed no signs of avascular necrosis. At the latest follow-up, all patients had good or excellent results. Conclusion: We suggest dorsal percutaneous screw fixation for scaphoid delayed fractures or nonunions after eliminating the presence of AVN by pre-operative MRI examination.