ABSTRACT
This study evaluates the position of the femoral tunnel, which is achieved using a
transtibial, single-bundle anterior cruciate ligament (ACL) reconstruction technique.
The radiographs of 50 consecutive, primary single-bundle ACL reconstructed knees using
this technique were reviewed. The angle between the femoral tunnel and the apex of
the intercondylar notch was recorded. The average angle from the 12-o'clock vertical
position to the femoral tunnel was 49° (range, 39°-59.2°; SD = 3.9), corresponding
to the 10:20 position on a clock face for a right knee. These results demonstrate
that it is technically possible to create an obliquely oriented single-bundle femoral
tunnel at approximately the 10:20 position through a tibial tunnel angled approximately
60° from the proximal tibial joint surface. This correlates to a femoral tunnel approximately
midway between the anteromedial and posterolateral bundle origins of the ACL.
