title: Erratum to: Cutting efficiency of nickel-titanium rotary and reciprocating instruments after prolonged use.
authors.affiliation: Department of Endodontics, "Sapienza" University of Rome, Via Tommaso Salvini, 57 - 00197, Rome, Italy.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Gambarini
authors.affiliation: Department of Endodontics, "Sapienza" University of Rome, Via Tommaso Salvini, 57 - 00197, Rome, Italy.
authors.forename: Alessio
authors.initials: A
authors.lastname: Giansiracusa Rubini
authors.affiliation: University of Tor Vergata, Rome, Italy.
authors.forename: Giampaolo
authors.initials: G
authors.lastname: Sannino
authors.affiliation: Department of Endodontics, "Sapienza" University of Rome, Via Tommaso Salvini, 57 - 00197, Rome, Italy.
authors.forename: Gianni
authors.initials: G
authors.lastname: Di Giorgio
authors.affiliation: Universidade Paranaense UNIPAR, Cascavel, Brazil.
authors.forename: Lucila
authors.initials: L
authors.lastname: Piasecki
authors.affiliation: Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Dina
authors.initials: D
authors.lastname: Al-Sudani
authors.affiliation: Department of Endodontics, "Sapienza" University of Rome, Via Tommaso Salvini, 57 - 00197, Rome, Italy. endo@gianlucaplotino.com.
authors.forename: Gianluca
authors.initials: G
authors.lastname: Plotino
authors.affiliation: Department of Endodontics, "Sapienza" University of Rome, Via Tommaso Salvini, 57 - 00197, Rome, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Testarelli