Knee surgery showdown: which graft keeps the kneecap in place best?

This study compares two surgical methods to fix a loose kneecap that keeps popping out. One method uses a standard hamstring tendon graft with a screw, while the other uses a newer quadriceps tendon graft with an anchor. Researchers will track 90 patients aged 15-40 to see which technique provides better stability and less pain after surgery.