Dead bone

Introduction Necrosis of bone is the cessation of local metabolism of bone tissue, and the necrotic bone is called sequestrum.

Cause

The cause of the formation of dead bones is mainly the interruption of blood supply. Histologically, bone cell death, disappearance, and bone marrow liquefaction and atrophy.

an examination

Related inspection

Blood test X-ray lipiodol

X-ray findings: There was no change in trabecular bone and calcium content in the early stage, and there was no abnormality on the X-ray. The bone density is increased. The shape of the dead bones is different and gradually absorbed over time. Osteonecrosis is more common in chronic suppurative osteomyelitis, ischemic necrosis of the bone and traumatic fractures.

Differential diagnosis

Osteoporosis is a reduction in bone mass, and the ratio of organic matter (protein, etc.) to inorganic substances (calcium, phosphorus, etc.) in the bone is reduced, which increases the fragility of the bone and is prone to fracture. Its occurrence is related to factors such as hormone metabolism, diet, exercise, immunity, and genetics. The clinical manifestations are: 1 low back pain, pain characterized by hook pain on both sides of the spine; 2 shortened height, "humpback" deformity; 3 prone to osteoporotic fractures, such as thoracolumbar vertebral compression fractures, femoral neck fractures, Burning bone fractures, etc.

Femoral head necrosis is a disease that is often and difficult to treat in orthopedics. Because the blood circulation to the femoral head is destroyed, the femoral head loses blood nutrition and is necrotic. Its occurrence is related to pith trauma (more common femoral neck fracture), long-term use of hormones, and long-term excessive drinking. The main clinical manifestations were local pain in the myeloid joints, a few with thighs or waist, increased pain when walking too much, tenderness in the groin, and medullary joint dysfunction.

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