Lasers deliver energy in the form of light. Depending on the intended result, this energy travels at different wavelengths and is absorbed by a "target." In dentistry, these targets can create the long and elegant smile or speed up the bleaching process associated with teeth whitening. Each one absorbs a different wavelength of light while reflecting other wavelengths. No measurable effect is seen beyond the intended target site. Lasers are very specific in regard to the wavelength produced. This means that there must be a different laser for each type of procedure that you want to complete. There is little or no sound associated with laser treatment. As technology advances, we hope to see lasers which can be used for several related treatments combined into one convenient machine.