In the UK, doctors treat this broken bone in different ways.
Some recommend a cast to let the bone heal by itself.
Some recommend an operation with plates and screws.
Having an operation can hold the bones in place correctly, but has some risks that may cause problems, for example infections or sometimes the plates and screws can be irritating and might need to be removed.
Using a special cast to hold the bones while they heal avoids surgery, but there is a small risk the bones slip out of place which might need further treatment.
We want to find out if one treatment is better than the other.