Prospective Studies Investigating Matrix-Induced Autologous Chondrocyte Implantation Report Higher Rates of Graft Failure Compared With Retrospective Studies: A Systematic Review.
ArthroscopyAug 24, 2026 (epub)
Clinical ResearchOrthopedic Surgery
Eric H Lin, Cailan L Feingold, Andrew B Barcenas et al.
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In 30 seconds
This systematic review analyzed 28 studies on matrix-induced autologous chondrocyte implantation (MACI) for knee cartilage defects, comparing outcomes between prospective and retrospective studies. It found that prospective studies reported significantly higher graft failure rates (4.30% vs 0.06%, P = .0043) compared to retrospective studies, while other outcomes were similar.
Key findings
- Prospective studies reported a graft failure rate of 4.30%, compared to 0.06% in retrospective studies (P = .0043).
- No significant differences were found in graft hypertrophy or postoperative complications between study types.
- Only 6 of 19 prospective studies reported return to sport, while none of the retrospective studies did.
- Eight different patient-reported outcome measures were identified, with the Knee Injury and Osteoarthritis Outcome Score being the most common.
Why it matters
Understanding the differences in reported outcomes between prospective and retrospective studies is essential for clinicians evaluating the efficacy of MACI procedures, as study design can significantly influence findings.