Abstract: A self heating inspection mirror for dental use has a pencil like handle with an angled mirror. A resistance wire heating coil is surrounded by wafers of insulation and lies in contact with the mirror. Leads pass down the handle to a plug and socket. The socket is in the battery compartment which allows the operator to unplug the handle and immerse the mirror and handle as a unit. The battery compartment has an integral switch for connecting the battery to the heating coil The 3V rechargeable lithium battery maintains the lightweight mirror at 43EC.