PRCT-study of Different Non-operative Treatment Protocols of ER-stress Negative Weber-B Unimalleolar Ankle Fractures.

PRCT multicenter study to evaluate non-operative treatment protocols for treating ER-stress negative unimalleolar Weber-B type fibular fractures. Groups are: 1. 3 weeks in a removable splint 2. 3 weeks in a cast and 3. 6 weeks in a cast. Follow-up visits at 3, 6 and 12 weeks and after 1 and 2 years after injury. In each time X-rays laterally and mortise projections. Ankle functional outcome questionnaires: Olerud-Molander score, FAOS RAND-36 and VAS in follow up-visits 6 and 12 weeks and 1 and 2 year.