Figure 5From: Surgical-experimental principles of anterior cruciate ligament (ACL) reconstruction with open growth platesa: The inclination of a round drill leads to an elliptic drill injury (a = drill diameter; z = longitudinal diameter of drill injury proportional to the drill inclination). b: Representation of the calculation of the longest diameter of an ellipse (a = drill diameter; α = angle between tunnel and growth plate [L]; z = length of the elliptic drill injury).Back to article page