In 2/3 failures, the patients had to undergo surgery to restore an adequate position at the fracture site whilst in one patient, a good result was achieved simply by treating the patient with a new plaster cast for an additional 3 weeks. It should be noted that the fracture in the patient who felt fracture instability immediately after early plaster cast removal was located slightly more proximal than the other fractures in the study, close to the transition between the metaphysis and the diaphysis. The anatomical location might have contributed to the feeling of instability.