['The purpose of this study was to determine whether providing bony stabilization between the tibia and femur improves the structural properties of an "enhanced" anterior cruciate ligament (ACL) repair using a collagen-platelet composite when compared with the traditional (Marshall) suture technique.', 'Twelve pigs underwent unilateral ACL transection and were treated with sutures connecting the bony femoral ACL attachment site to the distal ACL stump (ligament group) or to the tibia through a bone tunnel (tibia group). A collagen-platelet composite was placed around the sutures to enhance the biological repair in both groups. Anteroposterior knee laxity and the graft structural properties were measured after 15 weeks of healing in both the ACL-repaired and contralateral, ACL-intact joints.', 'Enhanced ACL repair with bone-to-bone fixation significantly improved yield load and linear stiffness of the ACL repairs (P < .05) after 15 weeks of healing. However, laxity values of the knees were similar in both groups of repaired knees (P > .10).'] Does bone-to-bone fixation enhance functional healing of the porcine anterior cruciate ligament using a collagen-platelet composite?