title: Assessment of root canal enlargement using Mtwo and BioRace rotary files.
abstract: OBJECTIVE
  To evaluate root canal enlargement following mechanical shaping using 2 nickel titanium rotary systems.
  
  
  METHODS
  Forty single-rooted teeth were immersed in resin and sectioned perpendicular to the long axis at 4, 8, and 12 mm from the apex. Digital capture of sections was performed before and after canal instrumentation using Mtwo and BioRace instruments. The area increase of endodontic space was calculated by subtraction.
  
  
  RESULTS
  The use of both instruments has allowed the removal of great amounts of dentin from the canal walls, even when the endodontic morphology is characterized by awkwardness to reach recesses.
  
  
  CONCLUSIONS
  Both procedures seem to be valid and no differences were found between Mtwo and BioRaCe considering the amount of dentin removed at different distances from the apex.
authors: Sezione di Scienze Stomatologiche, Insegnamento di Endodonzia, Università di Palermo, Via del Vespro 123, 90123 Palermo, Italy ; Policlinico Paolo Giaccone, Sezione Scienze Stomatologiche G. Messina, Università di Palermo, Via del Vespro 129, 90100 Palermo, Italy.
authors: Enzo
authors: 0000-0003-3420-8128
authors: E
authors: Cumbo
authors: Sezione di Scienze Stomatologiche, Università di Palermo, Via del Vespro 123, 90123 Palermo, Italy.
authors: Riccardo
authors: R
authors: Russo
authors: Sezione di Scienze Stomatologiche, Insegnamento di Odontoiatria Conservatrice, Università di Palermo, Via del Vespro 123, 90123 Palermo, Italy.
authors: Giuseppe
authors: G
authors: Gallina
mesh_terms: D003786:Dental Pulp Cavity / Q000601:surgery*; D006801:Humans; D010781:Photography / Q000295:instrumentation; D012390:Root Canal Therapy / Q000295:instrumentation*