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

Table 4

Comparison of mean graft bending angles at femoral tunnel aperture in each condition according to the flexion angle and transverse drill angle.

Flexion angle	Transverse drill angle
	MTA	MTA-10°	MTA-20°	P-
100° (degree)	65.4±4.5 (59.1~71.3)	60.5±4.6 (53.9~66.4)	56.4±4.5 (49.8~62.1)	<.001
110° (degree)	72.5±4.8 (65.5~77.7)	69.0±4.4 (62.3~74.0)	66.2±4.0 (60.0~70.8)	<.001
120° (degree)	79.5±3.2 (75.6~83.5)	76.9±3.0 (72.9~80.6)	74.7±2.9 (70.7~78.2)	<.001
130° (degree)	84.8±4.7 (78.2~90.5)	83.8±4.5 (77.2~89.0)	83.0±4.2 (76.6~87.5)	0.007
P-	<.001	<.001	<.001

MTA: maximum transverse drill angle without coming into contact with the medial condyle cartilage.
The graft bending angles (mm) are given as mean ± standard deviation (range).
-value for comparison of tunnel lengths between different transverse drill angles of MTA to MTA-20° in condition of fixed flexion angle.
-value for comparison of tunnel lengths between different flexion angles of 100° to 130° in condition of fixed transverse drill angle.