 A nurse delivered study drugs to the operating room in a sealed, non-descriptive envelope. During the standard anterior approach procedure, an anesthesiologist administered fentanyl or hydromorphone as needed for analgesia. The local anesthetics were administered after reduction of the implants. Patients in the LB group received 20cc liposomal bupivacaine, 40cc 0.25 bupivacaine with epinephrine, and 20cc of normal saline. Each patient in the control group received 60cc of 0.25 bupivacaine with epinephrine. Using a 20-gauge spinal needle, the local anesthetics were injected using a deep tissue administration technique. Structures innervated by the femoral nerve, superior gluteal nerve, or lateral femoral cutaneous nerve were considered suitable for injection. Throughout administration, frequent aspirations were performed to check for blood and minimize the risk of intravascular injection. The patients, surgical team, and floor staff was blinded to the local anesthetic drugs given. 