Second year follow-up magnetic resonance imaging. (a) Coronal and (b) sagittal three-dimensional gradient echo T1 (WATSf; repetition time 20, echo time 5.2, field of view 150, fractional anisotropy 15°, slice thickness 3 mm) left knee magnetic resonance images demonstrate the morphology of the cartilage implant. The graft is well integrated with a thickness that is similar to that of the adjacent cartilage; the graft surface is smooth (arrow). Mildly decreased signal intensity and artifacts are observed in the graft compared with the adjacent cartilage. Underneath, the large graft irregular bone contour (thick arrow) and osteophyte formation at bony margins is also noted. (c) Second-look arthroscopy at two years demonstrated complete filling of the defect and excellent integration of the newly formed cartilage with native tissue.