Arthroscopic Findings After Osteochondral Allografts of the Knee: Proposed Classification Scheme and Associations With Graft Failure

The authors aimed to evaluate the gross appearance of osteochondral allografts (OCAs) and the adjacent cartilage during second-look arthroscopy to define structural and clinical failure of the grafts. They found that 32.6% of grafts exhibited structural failure, primarily due to degeneration and chondral delamination, with significant adjacent cartilage damage present in a notable proportion of both failing and nonfailing grafts. The study suggests that understanding the macroscopic morphology of grafts could aid in better defining outcomes and guiding future interventions.