The subchondral bone plate is composed of two layers that separate articular cartilage from the marrow-containing cancellous bone. The superficial layer consists of calcified cartilage, which is separated by the cement line (tidemark) from the deep layer of compact cortical bone 1-3.
Radiographic features
Subchondral bone plate appears as one structure on MRI in routine clinical use, i.e. the calcified cartilage layer cannot be separate from subchondral bone 1.
Chemical shift artifact can result in artifactual thickening of the subchondral bone plate 1.
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