WaterLase uses a unique laser wavelength and water/air spray that cuts, etches and shapes the tissue without contact, heat, pressure or vibration – resulting in a usually painless procedure with no need for anesthetics. The automatic technology in the WaterLase sprays water and air continually to rehydrate the tooth, thus preventing heat and pain. This anesthetic-free option allows a dentist to perform certain procedures in one appointment instead of it taking many.