Video Gallery Orthopedic Arts patient. Transtibial amputee. Trying out a running foot Challenger by Otto Bock. Suction socket. Otto Bock Meridium Microprocessor Foot. Available at Orthopedic Arts. Otto Bock CLeg 4 microprocessor-controlled knee joint is the benchmark in electronic knee units. Available at Orthopedic Arts. Orthopedic Arts patient. Open Bionics Arm. First day. Chris is mastering a few new grip patterns. Orthopedic Arts patient. Bilateral transtibial amputee. Suction sockets. First day of trial.