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📌 Osteochondral Autograft Transplantation (OATS)
- Osteochondral Autograft Transplantation (OATS), or Mosaicplasty, is a surgical technique used to treat focal cartilage lesions in the knee by transplanting osteochondral cylinders from non-weight-bearing areas to damaged cartilage areas.
✅ Indications and Limitations
- Large Cartilage Defects: Challenging for lesions larger than 4 cm² due to donor site morbidity.
- Patient Criteria: Suitable for lesions up to 2.5 cm², typically in patients under 50 years old, but can address larger lesions.
✅ Procedure Overview
- Durability: The harvested graft with hyaline cartilage is more durable than fibrocartilage from microfracture procedures.
- Defect Types: Effective for larger, deeper, uncontained, and multiple cartilage defects.
- Graft Harvesting: Osteochondral cylinders are harvested from specific non-weight-bearing areas of the knee.
✅ Postoperative Imaging and Outcomes
- Assessment: Evaluate morphology of native and donor cartilage, fill defects, peripheral integration, and joint surface restoration.
- Early Healing: Transplanted tissue should fill the defect uniformly without gaps.
- Cartilage Thickness: Ideal match to surrounding cartilage, though patellar defects may present challenges.
✅ Healing and Complications
- Bone Marrow Edema: Common early postoperatively, typically resolves by 6 months.
- Donor Site Healing: Fills with fibrocartilage in 6-9 months; persistent edema may indicate morbidity.
- Edema Regression: Similar regression rates in donor and repair sites.
References
- Clin Imaging. 2019 Nov-Dec;58:129-139
- Semin Musculoskelet Radiol. 2022 Jun;26(3):216-229
- J Knee Surg. 2021 Jan;34(1):2-10
- J Clin Orthop Trauma. 2021 Sep 25;22:101610
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#OATS #Mosaicplasty #CartilageRepair #KneeSurgery #Orthopedics #SportsMedicine #CartilageLesions #JointHealth #MedicalImaging #SurgicalTechniques
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| (Fig 5-C.06) Failure of Microfracture Treatment (0) | 2024.07.17 |
| (Fig 5-C.05) MRI Findings of Microfracture Repair (0) | 2024.07.17 |
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