When knee cartilage repair is worth consideringCartilage lacks a blood supply and cannot self-heal, but surgical or minimally invasive repair can restore focal defects in otherwise healthy joints, potentially delaying knee replacement by years or decades.Cartilage lacks a blood supply and cannot self-heal, but surgical or minimally invasive repair can restore focal defects in otherwise healthy joints, potentially delaying knee replacement by years or decades.
The cost of leaving a knee cartilage defect untreatedKnee cartilage defects do not heal because cartilage lacks blood supply; defects widen under load with each step, spreading damage to surrounding tissue and progressing towards osteoarthritis if untreated.Knee cartilage defects do not heal because cartilage lacks blood supply; defects widen under load with each step, spreading damage to surrounding tissue and progressing towards osteoarthritis if untreated.
AMIC vs MACI for knee cartilage repairStandalone microfracture for knee cartilage defects has less than 60% survivorship at three years; AMIC adds a collagen membrane to stabilize repair, whilst MACI uses cultured chondrocytes and shows superiority in the SUMMIT trial for lesions over 3 cm².Standalone microfracture for knee cartilage defects has less than 60% survivorship at three years; AMIC adds a collagen membrane to stabilize repair, whilst MACI uses cultured chondrocytes and shows superiority in the SUMMIT trial for lesions over 3 cm².
What the ChondroFiller evidence actually showsChondroFiller's reoperation rate of 3–8% substantially outperforms microfracture (41%) and ACI/MACI (37%), reflecting its mechanism: the scaffold supports hyaline-like cartilage repair rather than the fibrocartilage scar tissue that other approaches produce.ChondroFiller's reoperation rate of 3–8% substantially outperforms microfracture (41%) and ACI/MACI (37%), reflecting its mechanism: the scaffold supports hyaline-like cartilage repair rather than the fibrocartilage scar tissue that other approaches produce.
Who qualifies for a ChondroFiller injectionChondroFiller targets ICRS Grade III–IV cartilage damage, where more than half the cartilage is lost or bone is exposed. Delivered as an ultrasound-guided outpatient injection, the collagen scaffold recruits the patient's own progenitor cells to initiate repair.ChondroFiller targets ICRS Grade III–IV cartilage damage, where more than half the cartilage is lost or bone is exposed. Delivered as an ultrasound-guided outpatient injection, the collagen scaffold recruits the patient's own progenitor cells to initiate repair.
Cartilage Specialist or General Orthopaedic SurgeonFocal cartilage damage—treated with progressive repair techniques from injections to cell-based therapy—warrants a cartilage specialist. Widespread arthritis, fractures, or joint replacement require a general orthopaedic surgeon. Damage type and location, not pain severity, determine which specialist is appropriate.Focal cartilage damage—treated with progressive repair techniques from injections to cell-based therapy—warrants a cartilage specialist. Widespread arthritis, fractures, or joint replacement require a general orthopaedic surgeon. Damage type and location, not pain severity, determine which specialist is appropriate.
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.
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.
ChondroFiller vs PRP for focal cartilage defectsFocal cartilage defects and diffuse cartilage loss are different problems requiring different solutions. ChondroFiller, a collagen scaffold, physically occupies and stabilises focal voids, recruiting repair cells over 12–24 months. PRP releases growth factors to reduce inflammation but cannot fill a structural gap. Imaging reveals which mechanism addresses the patient's underlying…Focal cartilage defects and diffuse cartilage loss are different problems requiring different solutions. ChondroFiller, a collagen scaffold, physically occupies and stabilises focal voids, recruiting repair cells over 12–24 months. PRP releases growth factors to reduce inflammation but cannot fill a structural gap. Imaging reveals which mechanism addresses the patient's underlying problem.
Who qualifies for ChondroFiller injectionChondroFiller targets Grade III and IV cartilage damage—focal defects or distributed osteoarthritis—using a collagen scaffold to support biological repair across both presentations, provided joint mechanical stability remains intact.ChondroFiller targets Grade III and IV cartilage damage—focal defects or distributed osteoarthritis—using a collagen scaffold to support biological repair across both presentations, provided joint mechanical stability remains intact.
Symptoms That Warrant a Cartilage SpecialistArticular cartilage cannot repair itself because it contains no blood vessels or nerves; defects exceeding approximately 1 cm in size tend to deteriorate rather than stabilise, and the window for joint-preserving intervention is finite.Articular cartilage cannot repair itself because it contains no blood vessels or nerves; defects exceeding approximately 1 cm in size tend to deteriorate rather than stabilise, and the window for joint-preserving intervention is finite.