ACI or MACI for knee cartilage repairBoth ACI and MACI require two operations: stage-1 biopsy yields too few chondrocytes for immediate repair, so stage-2 implantation must follow 3–6 weeks of laboratory expansion.Both ACI and MACI require two operations: stage-1 biopsy yields too few chondrocytes for immediate repair, so stage-2 implantation must follow 3–6 weeks of laboratory expansion.
ChondroFiller for focal knee defects, not osteoarthritisChondroFiller is an injectable collagen scaffold that recruits a patient's own progenitor cells for cartilage repair. It works only on focal defects; chronic inflammation and cell depletion in osteoarthritis eliminate the biological conditions it requires.ChondroFiller is an injectable collagen scaffold that recruits a patient's own progenitor cells for cartilage repair. It works only on focal defects; chronic inflammation and cell depletion in osteoarthritis eliminate the biological conditions it requires.
OATS versus mosaicplasty for knee cartilage repairOATS and mosaicplasty are the same surgical technique applied at different scales: OATS transfers a single cartilage plug for knee defects under 2 cm², mosaicplasty tiles smaller grafts across 2–4 cm² lesions.OATS and mosaicplasty are the same surgical technique applied at different scales: OATS transfers a single cartilage plug for knee defects under 2 cm², mosaicplasty tiles smaller grafts across 2–4 cm² lesions.
Osteochondral Allograft for Post-Traumatic Knee DefectsWhen post-traumatic knee injury damages both cartilage and underlying bone, osteochondral allograft transplants provide a single-stage solution that other repair methods cannot match. Roughly 75–82% of patients return to sport; grafts show 87% survival at five years, declining to 68% at twenty.When post-traumatic knee injury damages both cartilage and underlying bone, osteochondral allograft transplants provide a single-stage solution that other repair methods cannot match. Roughly 75–82% of patients return to sport; grafts show 87% survival at five years, declining to 68% at twenty.
AMIC vs microfracture for knee cartilage repairBoth AMIC and microfracture improve pain and function in the first two years; beyond that point, microfracture outcomes progressively deteriorate whilst AMIC maintains stable gains through a decade of follow-up.Both AMIC and microfracture improve pain and function in the first two years; beyond that point, microfracture outcomes progressively deteriorate whilst AMIC maintains stable gains through a decade of follow-up.
ACI knee cartilage repair in the UKACI harvests a patient's own cartilage cells, cultures them to roughly 20 times their original number, then implants them in a second operation; NHS funding applies only to patients with defects over 2 cm², no prior cartilage repair, minimal arthritis, and access to a specialist centre.ACI harvests a patient's own cartilage cells, cultures them to roughly 20 times their original number, then implants them in a second operation; NHS funding applies only to patients with defects over 2 cm², no prior cartilage repair, minimal arthritis, and access to a specialist centre.
ACI vs MACI for knee cartilage repairMACI seeds harvested chondrocytes onto a collagen membrane secured with fibrin glue; first-generation ACI injects them as a liquid suspension under a sutured periosteal patch. This engineering difference has driven MACI's adoption: complication rates of approximately 10% versus 29%, with superior pain reduction and activity levels.MACI seeds harvested chondrocytes onto a collagen membrane secured with fibrin glue; first-generation ACI injects them as a liquid suspension under a sutured periosteal patch. This engineering difference has driven MACI's adoption: complication rates of approximately 10% versus 29%, with superior pain reduction and activity levels.
MACI vs Microfracture for Knee Cartilage RepairFor focal knee cartilage defects above 3 cm², MACI outperformed microfracture across all clinical measures: pain scores improved to 82.5 versus 70.9 at two years, with durability sustained at five-year follow-up.For focal knee cartilage defects above 3 cm², MACI outperformed microfracture across all clinical measures: pain scores improved to 82.5 versus 70.9 at two years, with durability sustained at five-year follow-up.
STACi vs MACI for knee cartilage repairSTACi performs knee cartilage repair in one operation by combining bone-marrow stem cells with patient chondrocytes on a three-dimensional scaffold — differing from MACI in cell composition and scaffold structure, though lacking randomised-trial evidence for long-term durability.STACi performs knee cartilage repair in one operation by combining bone-marrow stem cells with patient chondrocytes on a three-dimensional scaffold — differing from MACI in cell composition and scaffold structure, though lacking randomised-trial evidence for long-term durability.
OATS and Mosaicplasty for Knee Cartilage RepairOATS delivers genuine hyaline cartilage — the knee's native resilient material — to repair focal defects in one operation; marrow-stimulation techniques like microfracture instead produce fibrocartilage, scar-like tissue that begins to break down within two to three years under athletic demand.OATS delivers genuine hyaline cartilage — the knee's native resilient material — to repair focal defects in one operation; marrow-stimulation techniques like microfracture instead produce fibrocartilage, scar-like tissue that begins to break down within two to three years under athletic demand.
OATS or microfracture for active knee patientsMicrofracture improves early but deteriorates progressively beyond two years because it deposits fibrocartilage, whilst OATS transplants intact cartilage that remains stable long-term.Microfracture improves early but deteriorates progressively beyond two years because it deposits fibrocartilage, whilst OATS transplants intact cartilage that remains stable long-term.
Injectable scaffold vs surgical knee cartilage repairFor focal knee cartilage defects, injectable collagen scaffolds provide a non-surgical treatment by acting as an acellular matrix that guides the patient's own progenitor cells in regenerating cartilage-like tissue, overcoming cartilage's inability to repair itself due to lacking blood supply.For focal knee cartilage defects, injectable collagen scaffolds provide a non-surgical treatment by acting as an acellular matrix that guides the patient's own progenitor cells in regenerating cartilage-like tissue, overcoming cartilage's inability to repair itself due to lacking blood supply.