The DIAGNOdent laser can detect small cavities at an early stage before they would appear on an x-rays or to the naked eye . In the past, these tiny cavities would have been undetectable until they caused significant damage. With the laser, they can be identified much sooner reducing the damage to the natural tooth structure. It works by processing the light wavelength reflection into the hand held unit, and is very accurate. Early diagnoses of cavities leads to more effective and thorough treatment, and less discomfort for you.