Knee cartilage repair versus stem cell therapyEstablished cartilage repair using autologous chondrocytes shows 10–17 year durability for focal knee defects; mesenchymal stem cell therapies have not been tested in large-scale trials against them.Established cartilage repair using autologous chondrocytes shows 10–17 year durability for focal knee defects; mesenchymal stem cell therapies have not been tested in large-scale trials against them.
OATS Mosaicplasty Knee Recovery TimelineFull recovery from OATS mosaicplasty spans 6–12 months, extending to 12–18 months for competitive sport, because transplanted bone-and-cartilage plugs require time for biological integration and graft maturation.Full recovery from OATS mosaicplasty spans 6–12 months, extending to 12–18 months for competitive sport, because transplanted bone-and-cartilage plugs require time for biological integration and graft maturation.
Ten-Year Success Rates for OATS MosaicplastyTen-year success rates for OATS mosaicplasty span 72–89% in young, active patients; failure rates drop to 12.5–14% in optimal candidates (under 40, lesion under 3 cm²) but rise to 38–40% in older patients with larger defects.Ten-year success rates for OATS mosaicplasty span 72–89% in young, active patients; failure rates drop to 12.5–14% in optimal candidates (under 40, lesion under 3 cm²) but rise to 38–40% in older patients with larger defects.
OATS versus osteochondral allograft for large knee defectsDefect size determines which procedure: OATS, harvesting cartilage plugs from the patient's own knee, suits lesions up to 4 cm²; osteochondral allograft, using donor tissue, handles larger defects without an equivalent size limit.Defect size determines which procedure: OATS, harvesting cartilage plugs from the patient's own knee, suits lesions up to 4 cm²; osteochondral allograft, using donor tissue, handles larger defects without an equivalent size limit.
Osteochondral Allograft for Post-Traumatic Knee DefectsOsteochondral allograft restores both the cartilage surface and the bone beneath in a single operation for post-traumatic knee injuries — a combination other procedures cannot deliver.Osteochondral allograft restores both the cartilage surface and the bone beneath in a single operation for post-traumatic knee injuries — a combination other procedures cannot deliver.
Who Qualifies for OATS Knee Cartilage RepairOATS and mosaicplasty repair focal knee cartilage defects of 1–4 cm² with hyaline cartilage in a single operation; suitable for physically active patients aged 16–50, both achieve return to sport in 66–91% of cases.OATS and mosaicplasty repair focal knee cartilage defects of 1–4 cm² with hyaline cartilage in a single operation; suitable for physically active patients aged 16–50, both achieve return to sport in 66–91% of cases.
OCA vs MACI for large knee cartilage defectsMACI (matrix-induced autologous chondrocyte implantation) is a surface repair requiring intact subchondral bone; osteochondral allograft (OCA) replaces both cartilage and bone. When knee cartilage defects breach underlying bone, OCA addresses what MACI cannot.MACI (matrix-induced autologous chondrocyte implantation) is a surface repair requiring intact subchondral bone; osteochondral allograft (OCA) replaces both cartilage and bone. When knee cartilage defects breach underlying bone, OCA addresses what MACI cannot.
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.
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.