First, crutches in patients with femoral head necrosis can relieve symptoms such as pain, claudication, and dysfunction. Crutches can reduce the changes in the bone tension of the femoral head; reduce the direct effect of the extrusion of the femoral head and acetabulum under the action of internal and external factors; maintain the joint space and other effects, thereby reducing the different symptoms of patients with femoral head necrosis in different periods.

Secondly, after crutches, necrosis of the femoral head is conducive to the regeneration of blood vessels and the repair of bones. For femoral head necrosis, to ensure that the process of vascular regeneration is not hindered, the stress concentration around the necrosis must be resolved first. Crutches can reduce the weight of the femoral head, thereby reducing the stress surrounding necrosis and ensuring bony repair. In addition, new bone regeneration is relatively fragile, and crutches can reduce the collapse of the femoral head again.

Third, crutches can reduce the weight of the hip joint and femoral head in patients with femoral head necrosis. The mechanical relationship of the hip joint makes the femoral head carry 80% of the body's weight. This bearing capacity determines the bony structure of the hip joint and the rich muscle tissue of the hip joint, and completes the mechanical movement function of the joint. Functional exercise can enhance the flexibility of hip joint movement, and can also strengthen and plump the vitality of the muscles around the hip joint. It is a determinant of the normal function of the hip joint. In the middle and late stages of the disease, the bone structure is prone to bone fragmentation, bone collapse, and large-scale bone cystic changes. Crutches can reduce the stress on the hip joint and femoral head by weight, and reduce or reduce bone damage.

It has been pointed out above that crutches are for some specific patients, mainly referring to patients with stage III femoral head necrosis, because at this time the condition of femoral head necrosis presents bone cracks, collapse, flattening and deformation, and the clinical symptoms are severe. This period is the femoral head. In the malignant developmental period of bone necrosis, autonomous movement and bearing capacity rapidly decrease, crutches should be given to minimize the development of bone destruction as much as possible.

First, crutches in patients with femoral head necrosis can relieve symptoms such as pain, claudication, and dysfunction. Crutches can reduce the changes in the bone tension of the femoral head; reduce the direct effect of the extrusion of the femoral head and acetabulum under the action of internal and external factors; maintain the joint space and other effects, thereby reducing the different symptoms of patients with femoral head necrosis in different periods.

Secondly, after crutches, necrosis of the femoral head is conducive to the regeneration of blood vessels and the repair of bones. For femoral head necrosis, to ensure that the process of vascular regeneration is not hindered, the stress concentration around the necrosis must be resolved first. Crutches can reduce the weight of the femoral head, thereby reducing the stress surrounding necrosis and ensuring bony repair. In addition, new bone regeneration is relatively fragile, and crutches can reduce the collapse of the femoral head again.

Third, crutches can reduce the weight of the hip joint and femoral head in patients with femoral head necrosis. The mechanical relationship of the hip joint makes the femoral head carry 80% of the body's weight. This bearing capacity determines the bony structure of the hip joint and the rich muscle tissue of the hip joint, and completes the mechanical movement function of the joint. Functional exercise can enhance the flexibility of hip joint movement, and can also strengthen and plump the vitality of the muscles around the hip joint. It is a determinant of the normal function of the hip joint. In the middle and late stages of the disease, the bone structure is prone to bone fragmentation, bone collapse, and large-scale bone cystic changes. Crutches can reduce the stress on the hip joint and femoral head by weight, and reduce or reduce bone damage.

It has been pointed out above that crutches are for some specific patients, mainly referring to patients with stage III femoral head necrosis, because at this time the condition of femoral head necrosis presents bone cracks, collapse, flattening and deformation, and the clinical symptoms are severe. This period is the femoral head. In the malignant developmental period of bone necrosis, autonomous movement and bearing capacity rapidly decrease, crutches should be given to minimize the development of bone destruction as much as possible.