Postoperative pain after using passive ultrasonic irrigation and easyclean device, irrigation activation techniques: a randomized clinical trial - Pereira, Renato Piai; Bramante, Clovis Monteiro; Duarte, Marco Antonio Hungaro; Alcalde, Murilo Priori; Piai, Cristiane de Gusmão Silva; Vivan, Rodrigo Ricci (Journal of Endodontics, 2023)