Figure 3
The composite image of the matched contours over the corresponding resected plane. The line CD was defined as the AP axis of the baseplate. The line PI was defined as the Insall line. The angles between the AP axis and the line PI were measured and recorded as the rotational degree. The percentage position of the baseplate AP axis over the patellar tendon was defined as the length of MD divided by the length of ML. The yellow area indicated the uncovered posterior cruciate ligament (PCL) zone. The green area indicated ± 5° rotation interval with respect to the Insall line. ML: the patellar tendon width. C: The centroid of the baseplate. D: The intersecting point of the baseplate AP axis extension over the patellar tendon. I: The medial 1/3 point of the patellar tendon. P: The projected middle of the PCL insertion site.
