Table 1.

Anatomic center of ACL femoral footprint

No.	Article (year)	Center of anteromedial bundle, %, $x$ × $y$, M ± SD	Number of cases	Method for measurement
1	Yamamoto (2004) [43]	25.0 ± 5 × 16.0 ± 5	10	Standard lateral radiographs
2	Colombet (2006) [44]	26.4 ± 2.6 × 25.3 ± 4.2	7	Standard lateral radiographs
3	Tsukada (2008) [45]	25.9 ± 2 × 17.8 ± 2.9	36	Standard lateral radiographs
4	Lorenz (2009) [46]	21 ± 3 × 22 ± 2	12	Standard lateral radiographs
5	Forsythe (2010) [47]	21.7 ± 2.5 × 33.2 ± 5.6	8	3D CT, similar to standard lateral radiographs position
6	Iriuchishima (2010) [48]	15 ± 6 × 26 ± 8	15	Standard lateral radiographs
7	Pietrini (2011) [49]	21.6 ± 5.6 × 14.2 ± 7.7	12	Standard lateral radiographs
8	Zantop (2008) [50]	18.5 × 22.3	20	Standard lateral radiographs
	Theoretical center* (pooled M ± SD)	24.2 ± 4.0 × 21.6 ± 5.2	–	–

$x$, distance from the center of the footprint to the proximal border along line $t$; $y$, distance from the center of the footprint to the Blumensaat line; $x$ and $y$ are expressed as percentages of $t$ and $h$. $t$, total sagittal diameter of the lateral condyle along the Blumensaat line; $h$, maximum intercondylar notch height; CT, computed tomography; M ± SD, mean ± standard deviation.

*The theoretical center of the anteromedial bundle was deduced by the pooled M ± SD of eight studies.