Semi-quantitative arthroscopic scoring system is related to clinical outcomes in patients after medial meniscus posterior root repair

• Published in: Journal of Orthopaedic Science
• Main Authors: Zhang, Ximing, Furumatsu, Takayuki, Okazaki, Yuki, Hiranaka, Takaaki, Kintaka, Keisuke, Xue, Haowei, Miyazawa, Shinichi, Ozaki, Toshifumi
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2021
• Subjects: SCAR
• Online Access: https://ousar.lib.okayama-u.ac.jp/files/public/6/62571/20211018101654413083/fulltext20211018-3.pdf; https://ousar.lib.okayama-u.ac.jp/files/public/6/62571/20211018101654790654/figure20211018-3.pdf; https://ousar.lib.okayama-u.ac.jp/files/public/6/62571/20211018101655121592/table20211018-3.pdf; https://ousar.lib.okayama-u.ac.jp/62571

Background Different methods are available to assess the healing status of repaired root for medial meniscus posterior root tears (MMPRT) using second-look arthroscopy. However, few studies are comparing them or validating their usefulness. Therefore, it was hypothesized that the semi-quantitative arthroscopic score might correlate more with 1-year clinical outcomes in patients with MMPRT than the qualitative evaluation. Methods Data of 61 patients who underwent MMPRT pullout repair and second-look arthroscopy were retrospectively evaluated. The semi-quantitative arthroscopic scoring system was divided into three evaluation criteria: scores from 0 to 10 points include the width of the bridging tissue, stability of the repaired root, and synovial coverage. The qualitative evaluation was classified into 4 status; complete healing, lax healing, scar tissue healing, and failed healing according to the stability and mobility of the repaired root. Multivariate linear regression analyses were used to identify predictors of 1-year postoperative clinical outcomes, including Knee Injury and Osteoarthritis Outcome, Lysholm, or International Knee Documentation Committee scores. Spearman's correlation analysis was used to analyze the correlation between second-look arthroscopic score/qualitative evaluation and 1-year postoperative clinical outcomes. In addition, the optimal cutoff point of semi-quantitative arthroscopic score was determined by receiver operating characteristic (ROC) curve. The Mann–Whitney U test was used to compare clinical outcomes between patients with semi-quantitative arthroscopic scores ≥8 and scores <8. Results All clinical scores significantly improved at 1 year postoperatively. A good correlation was observed between the semi-quantitative score and clinical scores, but none between qualitative evaluation and clinical scores. The optimal cutoff point of semi-quantitative second-look arthroscopic score was 8 points. Significantly, better clinical outcomes were observed in patients with ...