Ultrasonic Periodontal Debridement: Theory and Technique 2nd Edition, Marie D. George, Dani Botbyl, Timothy G. Donley, Philip M. Preshaw, B0CJ1CBW21, 1119831040, 1119831067, 9781119831044, 9781119831051, 9781119831068, 978-1119831044, 978-1119831051,