How long does a cast need to be worn for hairline fracture in the wrist?

Typically, a hairline fracture in the wrist requires a cast for 4 to 6 weeks. In some cases, if the fracture is very small and stable, a cast may not be necessary and a wrist brace may be used instead. However, if the fracture is more severe, surgery may be necessary and the cast may need to be worn for longer.