The Waterlase is a revolutionary dental device that uses a combination of laser energy and water to perform many traditional dental procedures without anesthesia or pain. The Waterlase MD, uses a less invasive approach that conserves healthy tooth structure, helping you to maintain your natural teeth longer! When the traditional dental drill is used, heat and vibration are the major causes of most of the pain.. WaterLase reduces damage to healthy portions of the tooth and minimizes trauma. The Waterlase works so fast and avoids both heat and vibration, so the tooth nerve can't respond to register pain. This means no shots or the numb feeling after your dental visit. Due to itsâ€™ conservative cutting action, the Waterlase performs many soft tissue or gum procedures with little or no discomfort, bleeding, or post-op swelling.