Quantitative 3D MRI reveals limited intra-lesional bony overgrowth at 1 year after microfracture-based cartilage repair  M.S. Shive, A. Restrepo, S. Totterman, J. Tamez-Peña, E. Schreyer, M. Steinwachs, W.D. Stanish  Osteoarthritis and Cartilage  Volume 22, Issue 6, Pages 800-804 (June 2014) DOI: 10.1016/j.joca.2014.03.020 Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 (A) Frequency distributions for BO. Bars represent the number of patients with BO within a 5% range. The BO is calculated by 3D quantitative MRI using the ratio of intra-lesional bone volume at 12 months to the baseline (post-debridement) cartilage lesion volume at 1 month post-treatment. More than 80% of patients had less than 10% BO. (B) Characterization of intra-lesional BO. First row: example of spotty BO; maximum bone height was ∼25% of the surrounding cartilage thickness. Second row: example of planar BO; maximum bone height was ∼50% of the surrounding cartilage thickness. Third row: example of pre-existing BO recurring at 12 months. Osteoarthritis and Cartilage 2014 22, 800-804DOI: (10.1016/j.joca.2014.03.020) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions