Bone And Joint Disease, Meniscal Mri Study

Objective: TO explore the relationship of MRI performance of meniscus with several factors of knee local environment in osteoarthritis (OA) and discuss the local reasons that cause those abnormal signals in MR imaging.Materials and Methods: Thirty-eight patients with symptoms, suffering from essential OA confirmed by the arthroscopy, were enrolled. The degree of cartilage degeneration was graded with Outerbridges Classification and syral' score system for synovitis under arthroscopy. The meniscus abnormal MRI signal was graded on a 0-Ⅲ scale. The relationship of score of articular cartilage with the grade of meniscus MRI signal was analyzed by Spearman'correlation. The relationship between score of synovitis and grade of the meniscus MRI signals was analyzed by Spearman'correlation and partial correlation. The difference of meniscus MRI signals between normal and deficient group of cruciate ligament under arthroscopy was analyzed by Fisher'exact text.Results: These result demonstrate that the correlation between the grade of medial menisci and the Outerbridge'score of medial femoral and tibial condyle cartilage was statistically significant (r=o.698 P<0.0001; r=0.564 P<0.0001) and not correlated with the score of patella cartilage (r=0.123 P=0.461), respectively. Considering articular cartilage as a confounding factor, no correlation was statistically significant between the medial menisci grade and synovitis score (r=0.281 P=0.101). Statistically Significant difference was observed between the incident rate of medial menisci MRI signal in normal cruciate ligament group and cruciate-deficient group (P<0.01). Similar results were observed for the lateral menisci.Conclusion: 1. Meniscus MRI abnormal signals were caused primarily by Load bearing and gradually losing the function harmonizing motion state in knee ,the cruciate ligament has an important effect in it. 2. The function of synovitis may be no important effect and need to be observed .