Paper # 18: Effects of Tunnel Placement and Knee Flexion Angle for Graft Fixation on Rotational Stability after Single-Bundle ACL Reconstruction

2011 ◽  
Vol 27 (10) ◽  
pp. e82-e83
Author(s):  
Aníbal Debandi ◽  
Akira Maeyama ◽  
Shigehiro Asai ◽  
Bunsei Goto ◽  
Chad Hume ◽  
...  
Keyword(s):  
Acl Reconstruction ◽  
Knee Flexion ◽  
Graft Fixation ◽  
Flexion Angle ◽  
Rotational Stability ◽  
Single Bundle ◽  
Knee Flexion Angle ◽  
Tunnel Placement

scholarly journals Optimal Condition to Create Femoral Tunnel Considering Combined Influence of Knee Flexion and Transverse Drill Angle in Anatomical Single-Bundle ACL Reconstruction Using Medial Portal Technique: 3D Simulation Study

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Sung-Hwan Kim ◽  
Sung-Jae Kim ◽  
Chong Hyuk Choi ◽  
Dohyun Kim ◽  
Min Jung
Keyword(s):  
Optimal Condition ◽  
Acl Reconstruction ◽  
Knee Flexion ◽  
Femoral Tunnel ◽  
Flexion Angle ◽  
Single Bundle ◽  
Tunnel Length ◽  
Bending Angle ◽  
Graft Bending Angle ◽  
Transportal Technique

There has been no previous study using three-dimensional (3D) measurement on femoral tunnel characteristics according to the combined influence of various flexion angles of knee and transverse drill angles in single-bundle ACL reconstruction with transportal technique. The purpose of this study was to determine optimal condition of knee flexion angle and transverse drill angle to create secure femoral tunnel in single-bundle ACL reconstruction with transportal technique considering tunnel length, tunnel wall breakage, and graft bending angle. This study was conducted using simulation of 3D computed tomography of thirty subjects. Three variables of femoral tunnel changed according to combined influence of four flexion angles of knee and three transverse drill angles were measured: tunnel length, wall breakage, and graft bending angle. There was no case of short femoral tunnel less than 25 mm at 120° and 130° of flexion. There was no case of breakage of femoral tunnel at 120° of flexion with maximum transverse drill angle (MTA) and MTA-10° and at 130° of flexion. Considering effect on graft bending angle, decrease of flexion angle and transverse drill angle could be appropriate in creating femoral tunnel. Increased flexion angle and transverse drill angle secured femoral tunnel having sufficiently long length without wall breakage. However, avoiding excessive flexion angle and maximum transverse drill angle could be recommended because they tended to cause more acute graft bending angle.

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