A prosthetic component suitable for trialing or long-term implantation is provided. The prosthetic component includes at least one sensor for measuring a parameter of the muscular-skeletal system or a biological parameter is disclosed. The prosthetic component comprises a conductive material. Electronic circuitry and sensors are housed within the prosthetic component. Data from the prosthetic component can be transmitted to a remote system. The prosthetic component can comprise steel, titanium, cobalt, an alloy, or other conductive material. At least a portion of the conductive material comprising the prosthetic component is coupled to ground to shield the sensor from parasitic coupling that can affect measurement accuracy. The prosthetic component can have an opening in the shield to allow sensing or transmission of data.