Woodpecker Dental PT-A Ultrasonic Scaler & Air Polisher 2 in 1 Smart System. The Woodpecker PT-A model combines air polishing and scaling into one smart system with an easy to understand and adjust touch screen display.  The PT-A is your complete prophylaxis solution.  Air polishing uses compressed air to spray powder and water on the tooth surface to remove surface adhesives such as plaque. It is comfortable for the patient, powerful and does not scratch the tooth surface. The PTA has dual water supply bottles and a multi function foot pedal. FDA Approved. One Year Warranty.