If these fractures are undisplaced, or minimally displaced, and stable, simple casting is adequate. These fractures should not be treated with a removable splint.
Most undisplaced fractures of this type are stable and do not require surgical fixation.
A long arm cast should always be used where it is necessary to control forearm rotation in order to prevent fracture displacement. In very young and in noncompliant children, a long arm cast is preferable even if a short cast would otherwise be appropriate
The long arm cast is applied according to standard procedure:
Splitting the cast
If a complete cast is applied in the acute phase after injury, it is safer to split the cast down to skin over its full length.