From: A prospective comparison of 3 hamstring ACL fixation devices—rigidfix, bioscrew, and intrafix—randomized into 4 groups with a minimum follow-up of 5 years
Back up fixation
Group#/Name
Button
Femur/Tibia
Staple
I/Rigidfix/Intrafix
0/0
1/0
II/Rigidfix/Bioscrew
1/2
0/27
III/Bioscrew/Intrafix
14/0
IV/Bioscrew/Bioscrew
9/13
2/14