A diagnostic system is provided that provides sensing and transmitting of fusion indicia to determine whether fusion has occurred. In some embodiments, a diagnostic system comprises a spinal implant or graft material; an antenna configured for sending signals to a remote location; a sensor configured for measuring at least one fusion indicia; and a receiver for receiving signals at the remote location.. In some embodiments, a method of utilizing a diagnostic system comprises the steps of inserting a spinal implant or graft material within a disc space between two vertebrae; measuring at least one fusion indicia; sending signals to a remote location with an antenna; and receiving signals with a receiver at the remote location.