Anatomical knee variables result in worse outcomes of latera
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A Study was conducted to compare the clinical results of meniscal allograft transplantation (MAT) between patients with discoid lateral meniscus (DLM) and non-DLM (NDLM) and to analyse whether anatomical deformities cause worse clinical results in DLM patients.

Patients who underwent unilateral MAT, including 115 patients with DLMs or NDLMs, were included in this study. Clinical outcomes [International Knee Documentation Committee (IKDC) scores, Lysholm scores, Tegner scores, and visual analogue scale (VAS) scores] and radiographic and MRI data were assessed. Clinical outcomes and anatomical knee variables were analysed by multivariate stepwise regression.

Results:
-- After more than 2 years of follow-up, 9 patients were lost to follow-up, and 59 patients with DLM and 47 patients with NDLM were included.

-- The mean postoperative results were significantly better than the preoperative data in both the DLM and NDLM groups.

-- In addition, postoperative IKDC, Lysholm, and VAS scores but not Tegner scores were better in the NDLM group than in the DLM group.

-- Several anatomical knee variables differed significantly between the NDLM and DLM groups and were associated with MAT outcomes.

-- The condylar prominence ratio of the lateral and medial femoral condyles adjacent to the intercondylar notch and squaring of the lateral femoral condyle (the distance of the straight articular condylar surface) were independent factors significantly correlated with the Lysholm scores for MAT at last follow-up.

Finally, MAT enhanced the role of the knee in both DLM and NDLM patients; however, NDLM patients were better off than DLM patients. This results can be underpinned by the prominence of condylate and squaring in the side femoral condyle.

Source: https://link.springer.com/article/10.1007/s00167-021-06509-8
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