Grafts to replace the ruptured ligament don’t naturally integrate with the bone; surgeons use screws to hold the graft in place. Titanium screws will last, but can shred the graft over time ...
In the video, [Daniel] is faced with a titanium Torx screw that refuses to come loose due to threadlocker, an adhesive that is applied to screws and other fasteners to prevent them coming loose.