关节软骨三无:血管、淋巴管、神经组织分层结构独特的细胞外基质II型胶原结构*ArticularKnee:Cartilage关节软骨White,shinymaterial,tough,rubbery白色、有光泽、有弹性的、有硬度的Consistency.¼”thickFunctionabsorbshock吸收震荡providesmoothsurface(facilitatemotion)提供表面的润滑Coversendsofbones(joint)覆盖骨末端endsofthefemur,thetopofthetibia,topofthefibulaandthebackofthepatella股骨末端、胫骨及腓骨上端、膑骨背面*Knee:ArticularCartilageArticularcartilageproducesawonderfullubrication关节软骨产生关节液mechanismwithalmostzerofriction,-thickviscousfluidlayerinsidethejoint关节液粘稠的*Knee:position透明软骨组成Cells细胞Chondrocytes(onlyonekind)Fluid80%WaterbyVolumeExtracelluarMatrix-TheFrameworkprovidesform&stabilityCollagens胶原Proteoglycans蛋白多糖Non-collagenousproteins*Knee:Cartilage正常成熟关节软骨结构*Knee:ArticularCartilageChondralboneSubchondralboneJointfluidForceTheinteractionbetweenwater&frameworkgivescartilagemechanicalpropertiesofstiffness&—逐渐被放弃MRI对软骨损伤的诊断直接显像软骨结构主观上认为是检出软骨磨损最佳手段敏感性偏低对早期软骨磨损的敏感性明显低于X线和CT关节腔造影
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