An auxiliary component that is used with a medical device is modified to provide for additional or enhanced functionality. In one specific embodiment, a sheath surrounds an intraoral electronic image sensor, and is provided with signal conductors integrated therein. Electrical communication is provided between the sensor and the sheath, such as via a direct electrical connection, a capacitive or inductive coupling or an optical link. The sheath, and particularly the signal conductors integrated therein, connects to a cable which in turn connects to another device, such as a processing module or computer.