title: Root canal anatomy preservation of WaveOne reciprocating files with or without glide path.
abstract: BACKGROUND
  This study evaluated the influence of glide path on canal curvature and axis modification after instrumentation with WaveOne Primary reciprocating files.
  
  
  METHODS
  Thirty ISO 15, 0.02 taper Endo Training Blocks were used. In group 1, glide path was created with PathFile 1, 2, and 3 at working length, whereas in group 2, glide path was not performed. In both groups, canals were shaped with WaveOne Primary reciprocating files at working length. Preinstrumentation and postinstrumentation digital images were superimposed and processed with Matlab r2010b software to analyze the curvature radius ratio (CRr) and the relative axis error (rAe), representing canal curvature modification. Data were analyzed with 1-way balanced analyses of variance at 2 levels (P < .05).
  
  
  RESULTS
  Glide path was found to be extremely significant for both CRr parameter (F = 9.59; df = 1; P = .004) and rAe parameter (F = 13.55; df = 1; P = .001).
  
  
  CONCLUSIONS
  Canal modifications seem to be significantly reduced when previous glide path is performed by using the new WaveOne nickel-titanium single-file system.
authors.affiliation: Department of Endodontics, University of Turin Dental School, Turin, Italy.
authors.forename: Elio
authors.initials: E
authors.lastname: Berutti
authors.forename: Davide Salvatore
authors.initials: DS
authors.lastname: Paolino
authors.forename: Giorgio
authors.initials: G
authors.lastname: Chiandussi
authors.forename: Mario
authors.initials: M
authors.lastname: Alovisi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Cantatore
authors.forename: Arnaldo
authors.initials: A
authors.lastname: Castellucci
authors.forename: Damiano
authors.initials: D
authors.lastname: Pasqualini
mesh_terms: D000465:Algorithms; D004396:Coloring Agents; D003722:Dental Alloys / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008953:Models, Anatomic; D009532:Nickel / Q000737:chemistry; D010781:Photography; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods / Q000592:standards; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium