R. C. V. Casarin, F. R. Pinto, F. H. Nociti Júnior, E. A. Sallum, A. W. Sallum, and M. Z. Casati, “Assessment of ultrasonic root surface scaling with different power settings. roughness evaluation”., Braz. J. Oral Sci., vol. 5, no. 17, pp. 996–1000, Nov. 2015.