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ACI versus MACI for Knee Cartilage RepairMACI seeds cultured cartilage cells onto a porcine-collagen scaffold fixed with fibrin glue; ACI injects them as liquid suspension sealed with a sutured flap. This mechanical difference determines recovery time, complication risk, and surgical complexity.MACI seeds cultured cartilage cells onto a porcine-collagen scaffold fixed with fibrin glue; ACI injects them as liquid suspension sealed with a sutured flap. This mechanical difference determines recovery time, complication risk, and surgical complexity.
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Knee cartilage damage left untreated and when repair helpsCartilage lacks blood vessels, nerve fibres, and lymph channels, so repair cells cannot reach injuries and pain does not warn of damage, allowing lesions to expand silently until they become clinically serious.Cartilage lacks blood vessels, nerve fibres, and lymph channels, so repair cells cannot reach injuries and pain does not warn of damage, allowing lesions to expand silently until they become clinically serious.
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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.
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ChondroFiller injection for knee cartilage defectsThe injected collagen scaffold gels in place and recruits the body's own progenitor cells to repair the cartilage defect without surgery or general anaesthetic. Functional scores improve from 48 to 80 on the IKDC scale over three years in independent European cohorts, with most of that improvement within six months.The injected collagen scaffold gels in place and recruits the body's own progenitor cells to repair the cartilage defect without surgery or general anaesthetic. Functional scores improve from 48 to 80 on the IKDC scale over three years in independent European cohorts, with most of that improvement within six months.
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Who qualifies for MACI knee surgery?for MACI if theirknees are structurally sound—stable ligaments,for MACI if their knees are structurally sound—stable ligaments,
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OATS or MACI for mid-size knee cartilage defectsWithin the 2–4 cm² range, cartilage defects are large enough that a single plug fails to cover them, yet small enough that two repair techniques remain viable: osteochondral autograft restores cartilage and bone in one operation but creates coverage gaps, whilst matrix-induced autologous chondrocyte implantation requires two operations with laboratory…Within the 2–4 cm² range, cartilage defects are large enough that a single plug fails to cover them, yet small enough that two repair techniques remain viable: osteochondral autograft restores cartilage and bone in one operation but creates coverage gaps, whilst matrix-induced autologous chondrocyte implantation requires two operations with laboratory culture but accommodates irregular shapes without gaps.
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ChondroFiller for focal knee defects versus early osteoarthritisFocal cartilage defects and early osteoarthritis produce identical symptoms but differ structurally — a contained lesion versus compartment-wide degeneration — and imaging determines which pathway applies. ChondroFiller, an injectable collagen scaffold into which the body's progenitor cells migrate and lay down new cartilage tissue, addresses only focal lesions.Focal cartilage defects and early osteoarthritis produce identical symptoms but differ structurally — a contained lesion versus compartment-wide degeneration — and imaging determines which pathway applies. ChondroFiller, an injectable collagen scaffold into which the body's progenitor cells migrate and lay down new cartilage tissue, addresses only focal lesions.
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Who qualifies for MACI knee surgeryMACI grows hyaline-like cartilage from the patient's own cells and maintains superior pain and function scores at five years, unlike microfracture, whose fibrocartilage typically deteriorates within two to three years.MACI grows hyaline-like cartilage from the patient's own cells and maintains superior pain and function scores at five years, unlike microfracture, whose fibrocartilage typically deteriorates within two to three years.
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ChondroFiller and Arthrosamid serve different knee conditionsChondroFiller recruits progenitor cells to rebuild focal cartilage defects, whilst Arthrosamid provides permanent cushioning for diffuse osteoarthritis by integrating into the joint capsule; the choice between them follows from what MRI reveals about the damage pattern, not from symptom severity.ChondroFiller recruits progenitor cells to rebuild focal cartilage defects, whilst Arthrosamid provides permanent cushioning for diffuse osteoarthritis by integrating into the joint capsule; the choice between them follows from what MRI reveals about the damage pattern, not from symptom severity.
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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.
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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.
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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.
