the fog - free dental mirror uses compressed air directed at and over the surface of the mirror to provide a protective air stream over the surface of the mirror to avoid the accumulation of moisture while keeping debris off of the surface of the dental mirror . the handle of the mirror is preferably aluminum , is multi - positionable and is ergonomically designed and allows for the novel regulation of airflow and quick connection of multi - positional mirror heads . the new and unique dental mirror is fully auto - clavable . air flow level is settable by an actuator and retains its position with the set air flow even if the user releases pressure therefrom and even after a full blast of air is executed .