Treatment of scaphoid fractures using a memory alloy nail-feet-fixation device

Scaphoid fracture is a common carpal fracture, and its treatment often requires fixation devices. This study aimed to investigate the efficacy and safety of a memory alloy nail-feet-fixation (MANFF) device in treating scaphoid fractures.

Sixty-six patients with closed scaphoid fractures were treated using the MANFF device between August 2011 and November 2013. Surgical outcomes were assessed using the Mayo wrist score, including pain intensity, functional status, range of motion and grip strength. Postoperative radiographic evaluation was performed every month.

Herbert score of fracture stability was A in 36 patients, B in 20 and C in 10. Forty-five patients were treated using the simple MANFF device, 10 with an auxiliary Kirschner wire and 11 underwent MANFF after autologous bone graft. Patients were followed-up for a mean of 6.5 ± 1.2 months (range, 6-12 months). Bone union was achieved in all patients. There was no infection, non-union, arthritic change, tendon issues or any other complications. At postoperative 6 months, 50 patients achieved excellent outcomes, nine achieved good outcomes, and seven achieved fair outcomes, with a mean score of 89.5 ± 6.3. Therefore, the rate of satisfactory outcomes (excellent and good) was 89.4%.

Treatment of scaphoid fractures using the MANFF method has good surgical outcomes in bone union and patient satisfaction.