How Long Should One Use Crutches After A Mild Fracture In Tibia Plateau?

i i haf a mild fracture in the tibia plateau about ten days ago. i took a xray a few days ago and the fracture has not moved. i am on crutches and splinter. how long do i have to use the crutches. I do not have any pain. but my leg is straight because of the splinter. when can i try to bend my knee