Treatment of proximal fifth metatarsal fractures with an ulna hook plate

Abstract

Introduction: Fractures of the base of the fifth metatarsal bone present one of the commonest fractures of the metatarsal bones. Conventionally intramedullary screws and tension band wiring have been used as internal fixation methods. Lately hook plates have also served as an alternative fixation method. We hereby report on our experience with the hook plate used in treating fractures of the proximal fifth metatarsal.

Methods: 21 patients treated with the hook plate for proximal fifth metatarsal fractures were assessed clinically and radiologically.

Results: Average time to union in primarily treated fractures (n=18) was 7.7 weeks (range 4.5-16 weeks). Average time to return of activities of daily living (ADLs) was 10.3 weeks (range 4.5-37 weeks). The average AOFAS midfoot score was 30.4 preoperatively and 95.2 postoperatively (p<0.01).

Conclusion: The ulna hook plate presents a suitable and adequate method of osteosynthesis used to primarily treat proximal fifth metatarsal fractures requiring surgical intervention with satisfactory post-operative outcomes.

Keywords: Hook plate; Internal fixation; Osteosynthesis; Proximal fifth metatarsal bone fracture.