Factors influencing long-term outcomes after matrix-induced autologous chondrocyte implantation: long-term results at 10 years
Background: Matrix-induced autologous chondrocyte implantation (MACI), the third-generation of the technique, is an established procedure for the treatment of focal cartilage defects in the knee. However, the literature lacks long-term results of MACI with good statistical power. - Purpose: To deter...
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| Hauptverfasser: | , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
September 14, 2024
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| In: |
The American journal of sports medicine
Year: 2024, Jahrgang: 52, Heft: 11, Pages: 2782-2791 |
| ISSN: | 1552-3365 |
| DOI: | 10.1177/03635465241270152 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1177/03635465241270152 Verlag, kostenfrei, Volltext: https://journals.sagepub.com/doi/10.1177/03635465241270152 
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| Verfasserangaben: | Johannes Weishorn, MD, Johanna Wiegand, Severin Zietzschmann, MD, Kevin-Arno Koch, MD, Christoph Rehnitz, MD, PhD, Tobias Renkawitz, MD, Prof., Tilman Walker, MD, PhD, and Yannic Bangert, MD |
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| 245 | 1 | 0 | |a Factors influencing long-term outcomes after matrix-induced autologous chondrocyte implantation |b long-term results at 10 years |c Johannes Weishorn, MD, Johanna Wiegand, Severin Zietzschmann, MD, Kevin-Arno Koch, MD, Christoph Rehnitz, MD, PhD, Tobias Renkawitz, MD, Prof., Tilman Walker, MD, PhD, and Yannic Bangert, MD |
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| 520 | |a Background: Matrix-induced autologous chondrocyte implantation (MACI), the third-generation of the technique, is an established procedure for the treatment of focal cartilage defects in the knee. However, the literature lacks long-term results of MACI with good statistical power. - Purpose: To determine long-term survival and patient-reported outcomes (PROs) in a representative cohort and to identify patient- and surgery-related parameters that may influence long-term clinical outcomes. - Study Design: Case series; Level of evidence, 4. - Methods: A total of 103 patients were clinically evaluated at the current follow-up of 8.1 years (range, 5-11.9 years). PRO measures (PROMs) included the Knee injury and Osteoarthritis Outcome Score (KOOS), EQ-5D, visual analog scale for pain, and Tegner Activity Scale. Magnetic resonance imaging results were evaluated by using the AMADEUS (area measurement and depth and underlying structures) and MOCART (magnetic resonance observation of cartilage repair tissue) 2.0 knee score classification systems. Potential factors influencing PROs were first identified univariately and investigated in a multivariate regression model. - Results: The defects had a mean size of 4.8 cm2 (range, 1.2-12 cm2) and were predominantly femorotibial (66%). The mean Kaplan-Meier survival rate of revision for any reason was 97.2% ± 1.6% at 10 years. In comparison to preoperative values, all PROMs were significantly improved at the current follow-up (P < .05). The MOCART 2.0 score peaked at 12 months (mean, 80.2 ± 15.3 months) and showed no significant change at 96 months (mean, 76.1 ± 19.5 months; P = .142). The linear multivariate regression model identified an association of body mass index (BMI), MOCART 2.0 score, and number of previous knee surgeries with KOOS (R2 = 0.41; f2 = 0.69). Further analysis of the individual determinants revealed an optimal BMI range of 20 to 29 for favorable PROs at 96 months. Significant correlations of MOCART subscores with the overall KOOS were found for graft surface and structure, bony reaction, and subchondral detectable changes. Only 30% of patients with2 previous surgeries and 20% of patients with 3 previous surgeries achieved a Patient Acceptable Symptom State (χ2 = 10.93; P = .012). - Conclusion: The present study shows consistently good long-term clinical outcomes after MACI with a low revision rate and high patient satisfaction. BMI and number of previous knee surgeries may influence clinical outcomes and should be considered in patient selection and education. There is a correlation between graft structure, subchondral bone changes on magnetic resonance imaging, and long-term PROMs. | ||
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