This means that it may take longer for the bone to heal (delayed union), or that the bone may not heal at all (non union). However, as discussed earlier the area of the bone that is fractured has a relatively poor blood supply. Approximately 66-75% of these fractures will heal with conservative management. There is a small risk of non union particularly if there is significant displacement.Īs with most fractures a Jones fracture will usually heal if the foot it protected from weight bearing for a long enough period of time. The majority of these injuries heal with conservative management without complication. X-ray of the foot demonstrating the zones of injury in base of 5th metatarsal fractures This injury is associated with sports such as football and rugby. It occurs at the junction of the metaphysis and diaphysis of the metatarsal bone (where the widened part of the bone at its end begins to thin out as it becomes the shaft of the bone). The mechanism of injury is similar to an avulsion injury. When the ankle is forced inwards, the pull on the muscle and its tendon is strong enough to pull a bit of bone off. While as the name suggests it occurs in dancers, anyone can get this fracture, from a trivial injury such as stepping off a kerb.Ī muscle in the leg called peroneus brevis attaches via its tendon to the base of the 5th metatarsal. A twisting injury to the foot and ankle literally pulls (avulsion) of a small piece of bone at the base of the 5th metatarsal. These injuries are also known as a Dancer’s fracture. Zone 1: Avulsion 5th metatarsal base fracture Foot x-ray demonstrating the zones of injury from 5th metatarsal fractures
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