Subgingival ultrasonic instrumentation of residual pockets irrigated with essential oils: a randomized controlled trial - Feng, Hsu Shao; Bernardo, Carlos Cheque; Sonoda, Livia Lie; Hayashi, Fernando; Romito, Giuseppe Alexandre; Lima, Luiz Antonio Pugliesi Alves de; Lotufo, Roberto Fraga Moreira; Pannuti, Cláudio Mendes (Journal of Clinical Periodontology, 2011)