An intervertebral implant having a composite wedgedowel configuration is provided. The use of asynchronous, single-phase current and voltage angle sensors with rolling data logs, along with a common clock to synchronize the signals to common time scale whenever a fault event is detected, avoids the need for simultaneous three-phase current measurement. The associated methods generally involve the steps of providing one or more real-time multidimensional visualizations of a target surgical field, identifying at least one visual feature in a pre-operative dataset, aligning the visual features with the multidimensional visualization, and incorporating one or more real-time, virtual surgical reference indicium into the real-time visualization. The discovery kernel generates a hardware details file. The input signal is converted into a form usable by the switching section. A plurality of exhaust apertures extend along spaced inner locations of the seat and evacuate an airflow from within an associated toilet bowl interior and through the suction outlet.