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Morphological characteristics of three types of endplate defects. (A-C) Grade 0: normal endplates, no concave or defects. (D-F) Grade 1: endplate discontinuity or focal defects of the endplate (arrow). (G-I) Grade 2: defects located at the anterior or posterior corner of a vertebral body (arrow). (J-L) Grade 3: irregular and extensive disruptions of the endplate (arrow).
