Influence of Posterior Tibial Slope on Stability and Second-Look Arthroscopic Findings after Anterior Cruciate Ligament Reconstruction / 대한정형외과학회잡지

ABSTRACT

PURPOSE: The purpose of this study was to analyze the influence of posterior tibial slope on stability in clinical and second-look arthroscopic evaluation after anterior cruciate ligament (ACL) reconstruction. MATERIALS AND METHODS: From 2000 to 2011, 124 patients who underwent ACL reconstruction using an allogaft were enrolled in this study. A posterior tibial slope between 0degrees and 4degrees was found in 28 patients (group A), between 5degrees and 9degrees in 64 patients (group B), and greater than 10degrees in 32 patients (group C). We evaluated stability using the Lachman test and a KT-2000 arthrometer. In second-look arthroscopy, grafted tendons were evaluated based on the tension, rupture, and synovial coverage. RESULTS: In clinical evaluation for stability, mean KT-2000 arthrometer and Lachman test at last follow-up showed no statistically significant differences depending on posterior tibial slope. Second-look arthroscopic findings showed no statistically significant difference between groups A and B (p=0.91). However, statistically significant relations were observed between groups A and C (p=0.03), and between groups B and C (p=0.02). CONCLUSION: The results of this study suggest that patients who underwent ACL reconstruction with higher posterior tibial slope (> or =10degrees) have more lax tension in second-look arthroscopy, but not in clinical stability tests.