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腰椎退行性骨关节炎的病因病机

来源:华人健康网 | 发布时间:2011-02-11 15:14:08 | www.chinesejk.com
  腰椎退行性改变往往先从椎间盘开始,随着水份的减少、纤维环的断裂和软骨板的破坏,椎间隙变小,关节突关节所受应力增大,软骨变性、软化,出现炎性反应;同时,韧带的附着力和弹性减弱,出现纵向分离或皱折,肌肉不能提供有效支撑,脊柱单位失去稳定性;随后,椎体边缘(尤其是韧带与椎间盘之间)和关节突关节出现增生改变(骨刺),椎管内也发生相应变化。这些增生样改变是一种随着年龄增长正常的生理变化,如果这种正常的生理进程受到损伤、寒冷刺激的影响,或增生的物质压迫刺激了窦椎神经、神经根或硬膜囊,就会产生症状。

(编辑:阳阳 )

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