BMP (bone morphogenetic protein), a cytokine that induces bone and cartilage formation.

Pathophysiology

Osteonecrosis refers to the classic pattern of cell death and complex osteogenesis and bone resorption processes. Osteocyte necrosis (ON) initiates with hematopoietic and adipocytic cellular necrosis along with interstitial marrow edema. ON happens after about 2 to 3 hours of anoxia; histological signs of osteocytic necrosis do not display until about 24 to 72 hours after hypoxia. ON is first characterized by pyknosis of nuclei,

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