Abstrait

Clinical curative effect and logistic regression analysis of bone anchor assisted knee extensor mechanism reconstruction for patellofemoral instability

Guofeng Cai, Rui Han, Fuke Wang, Guoliang Wang, Chuan He, Yanlin Li

The aim of this study is to explore the clinical curative effects of bone anchor assisted knee extensor mechanism reconstruction, and analyze the relative variables affecting outcome with a logistic regression method. Reconstruction was performed in 83 patients (Jan 2012-Dec 2015), including 54 males and 29 females (13 to 53 y of age, mean age 24 y) with an average disease course of 9 y (range from 1 to 13 y). Patients were clinically evaluated via the Lysholm and Kujula knee scores and the Insall criterion, and postoperative follow-up time varied from 12 to 48 months (average 28 months). At the first year follow-up time point, all patients were significantly improved from the Lysholm (69.33 ± 8.38 preoperatively and 88.65 ± 12.93 postoperatively) and Kujula (69.33 ± 8.38 preoperatively and 88.65 ± 12.93 postoperatively) knee scores (P<0.05). According to the Insall Criterion Evaluation, the results were indicative of 56 “Excellent” cases, 10 “Good” cases, and 9 “Normal” cases, with a ratio 79.5% of “Excellent” and “Good” cases. Logistic regression analysis suggested that this reconstruction had a better effect in adolescent patients, while Patella Alta and flat lateral femoral condyle exerted poor influence on procedure outcome.