The patella is laterally subluxed. tella described chondral defects of the patella but made no mention of chondral injuries of the lateral femoral condyle [1–5]. Women had lower outcomes, and the need for realignment procedures led to a slower recovery. Radiographic features A significant number of osteochondral injuries involve the midlateral weight-bearing portion of the lateral femoral condyle and are more posterior than would be expected after transient dislocation of the patella. To measure the efficacy of osteochondral repair in a primate and determine if osteochondral repair differs in the patella (PA) and the medial femoral condyle (FC) and if passive motion treatment affects osteochondral repair, we created 3.2 mm diameter 4.0 mm deep osteochondral defects of the articular surfaces of the PA and FC in both knees of twelve skeletally mature cynomolgus monkeys. Women had lower outcomes, and the need for realignment procedures led to a slower recovery. Isolated lesions of cartilage or subchondral bone are not considered an OCD 6. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. A T1W sagittal image of the left knee shows an osteochondral defect (arrow) in the medial patellar facet with accompanied bone marrow oedema and the thickened, heterogeneous and fissured overlying cartilage. cartilage injury with associated subchondral fracture but without detachment; thin sclerotic margin This fact reinforces the diagnosis of pre-fracture patellar dislocation. A significant number of osteochondral injuries involve the midlateral weight-bearing portion of the lateral femoral condyle and are more posterior than would be expected after transient dislocation of the patella. It is often used synonymously with osteochondral injury/defect and in the pediatric population. 10A, 10B). X-rays pass through the knee from anterior to posterior at a 90° angle to the lower leg. This injury pattern can be explained by the mechanism of injury. 1 The knee joint is perhaps one of the busiest joints in the body as it bears most of the body weight when standing. MRI evaluation showed some abnormal findings with the presence of bone overgrowth, but no correlation has been … The word osteochondral refers to anything relating to cartilage and bone. The treatment of focal cartilage defects of the patella is a major challenge in the field of cartilage repair. A localized osteochondral defect can be created acutely or can develop as an end result of several chronic conditions. Traumatic patellar dislocation 2 days ago. There is an osteochondral fragment floating within the suprapatellar bursa which is isointense with bone structures in all sequences. Medial stabilization with MPFL reconstruction is more controversial due to the risk of arthrofibrosis. A chondral defect refers to a focal area of damage to the articular cartilage (the cartilage that lines the end of the bones). About Dr. Sumer Sethi Number of Entries : 35. There are kissing-contusions secondary to patella dislocation and a shallow trochlear groove, which has predisposed to patella dislocation during the trauma. An osteochondral defect was identified over the medial facet of patella with a loose osteochondral fragment with very little bone attached to the large cartilaginous part. Based on multiple studies demonstrating similar functional outcomes after both conservative and operative procedures for treatment of APD, Conservative treatment has been traditionally the preferred option for APD without an osteochondral fracture (OCF) [1,2,3,4,5,6,7,8]. All these cases presented ICRS stage IV osteochondritis dissecans with an empty defect lesion. Normal menisci, collateral ligaments and cruciate ligaments. A dorsal defect of the patella is a variant related to normal ossification, present in 0.3 to 1 % of the population, located in the superolateral aspect of the articular surface of the patella. Acute lateral patellar dislocation at MR imaging: injury patterns of medial patellar soft-tissue restraints and osteochondral injuries of the inferomedial patella. Osteochondral defects of the lateral femoral condyle are a common sequela after transient lateral patellar dislocation. cartilage defects are varied and include repair, regeneration, and reconstruction. Osteochondral injuries represent a spectrum of articular conditions ranging from acute cartilage tears to chronic osteochondral defects, including osteochondritis dissecans (OCD). Conclusion: The implantation of a cell-free collagen-hydroxyapatite osteochondral scaffold provided a clinical improvement at short-term follow-up for the treatment of patellar cartilage defects. Osteochondral defect of the lateral femoral condyle is common sequela after lateral patellar dislocation, mostly involving the non-weight-bearing portion of the antero-lateral aspect of the condyle. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. These can occur from an acute traumatic injury to the knee or an underlying disorder of the bone. Your thighbone (femur), shinbone (tibia), and kneecap (patella) fit tightly together and move smoothly because the bone surface is covered with a thick coating of articular (hyaline) cartilage. Patellar osteochondral fracture is an injury frequently associated with patellar instability, which may onset in the first episode. Red arrow and asterisk indicate osteochondral fragment. One commonly used technique is the axial projection. {"url":"/signup-modal-props.json?lang=us\u0026email="}. It is bilateral in up to one-third of individuals. 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