Calcium Hydroxide Removal Using Four Different Irrigation Systems: A Quantitative Evaluation by Scanning Electron Microscopy oleh Luigi Generali, Francesco Cavani, Federico Franceschetti, Paolo Sassatelli, Luciano Giardino, Chiara Pirani, Francesco Iacono, Carlo Bertoldi, Daniele Angerame, Vittorio Checchi, Eugenio Pedullà