2021 Annual Meeting Knee Access Pass-Biomechanical analysis of ideal knee flexion angle for ACL graft tensioning utilizing multiple femoral and tibial tunnel locations

Biomechanical analysis of ideal knee flexion angle for ACL graft tensioning utilizing multiple femoral and tibial tunnel locations

Back to course

Video Transcription

Video Summary

This biomechanical study analyzed optimal knee flexion angles for ACL graft tensioning using various femoral and tibial tunnel placements in cadaver knees. Results showed the ACL is not isometric; graft excursion varies with femoral tunnel location but not tibial. Maximum graft tension angle depends on femoral tunnel positioning: anatomic femoral tunnels have peak tension at full extension (0°), while trans-tibial tunnels peak at about 40° flexion. Therefore, securing the graft at its maximum tension angle per femoral tunnel site may reduce graft stretching and re-rupture risk. Proper tunnel placement and tensioning angle are critical for ACL reconstruction success.

Asset Caption

Dr. Jon Hammarstedt | ACL Graft and Revision

Keywords

ACL reconstruction

knee flexion angle

femoral tunnel placement

graft tension

biomechanical study