骨质坏死（necrosis of bone）是骨组织局部代谢的停止，坏死的骨质称为死骨（sequestrum）。形成死骨的主要原因是血液供应的中断。 骨质局限密度增高——死骨。在早期骨小梁和钙质含量无任何变化，X线上也无异常表现。 骨质局限性密度增高。死骨的形态不一，并随时间渐被吸收。 1.周围骨质疏松，死骨相对密度增高 2.死骨骨小梁表面有新骨形成，骨小梁增粗，绝对密度增高 1.慢性化脓性骨髓炎 2.骨缺血性坏死 3.外伤骨折后
目的为治疗距骨颈骨折、距骨体缺血性坏死和踝、足部其它骨质病损提供系列术式。
Objective To provide a series of surgical approaches for treatment of talus neck fracture, ischemic necrosis of talus body, and other bone lesions in ankle and foot.
结果：观察显示，结核因子注射部位出现干酪性坏死，破骨细胞数量增加，骨质破坏明显。
Results: Caseification, osteoclast hyperplasia and bone destruction were found in the location of Mt sonicate injection.
目的探讨健康教育对股骨头缺血性坏死患者骨质修复程度的影响。
Objective To investigate the influence of health education on sclerotin reparation of patients with avascular necrosis of femoral-head (ANFH) after interventional therapy.
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