To flat or not to flat? Exploring the impact of flat-side design on rotary instruments using a comprehensive multimethod investigation.
Emmanuel João Nogueira Leal da SilvaMurilo Priori AlcaldeJorge N R MartinsVictor Talarico Leal VieiraRodrigo Ricci VivanMarco Antonio Hungaro DuarteFelipe Gonçalves BelladonnaFrancisco Manuel Braz-FernandesMarco Aurélio VersianiPublished in: International endodontic journal (2023)
The flat-side instrument showcased enhanced cutting ability compared to its nonflat counterpart. However, it exhibited inferior performance in terms of time, rotation and maximum torque to fracture, along with distinct phase transformation temperatures. No differences were observed in the titanium-to-nickel ratios, angle of rotation, maximum bending, buckling load, preparation time, percentage of untouched canal walls, volume of hard tissue debris and percentage reduction of dentine thickness.