title: Comparative Analysis of Protaper and Waveone Systems to Reduce Enterococcus Faecalis from Root Canal System in Primary Molars--An in Vitro Study.
abstract: OBJECTIVE
  To assess, in vitro, the ability of the ProTaper(™) and WaveOne(™) systems to reduce Enterococcus faecalis contamination in primary molars.
  
  
  METHODS
  Sixty roots of primary molars were contaminated with E. faecalis. Roots were randomly allocated to one of four groups (n=20): ProTaper(™), WaveOne(™), control A, or control B. The files used were S1 and S2/F1 and F2 (ProTaper(™) system) and 25.08 (WaveOne(™) system). In control group A, the root canal was left uninstrumented, whereas in control group B, the root canal was irrigated with NaCl 0.9%. E. faecalis was sampled from the root canal system before and after instrumentation and the Wilcoxon test and Mann-Whitney U were used.
  
  
  RESULTS
  There were no differences in E. faecalis counts between pre-instrumentation counts in the ProTaper™ and WaveOne(™) (p>0.05). The ProTaper(™) system led to an 89.36% reduction in E. faecalis burden, versus 78.10% with the WaveOne(™) system (p>0.05). Instrumentation time was shorter with WaveOne(™) (p<0.0001).
  
  
  CONCLUSIONS
  The ProTaper(™) and WaveOne™ systems were equally effective in reducing Enterococcus faecalis in primary molars. The WaveOne(™) system was associated with shorter instrumentation time.
authors.forename: Sérgio Luiz
authors.initials: SL
authors.lastname: Pinheiro
authors.forename: Carolina
authors.initials: C
authors.lastname: Pessoa
authors.forename: Josianne Neres
authors.initials: JN
authors.lastname: da Silva
authors.forename: Rafael Orro
authors.initials: RO
authors.lastname: Gonçalves
authors.forename: Danilo Antonio
authors.initials: DA
authors.lastname: Duarte
authors.forename: Carlos Eduardo
authors.initials: CE
authors.lastname: da Silveira Bueno
mesh_terms: D058491:Bacterial Load; D003722:Dental Alloys / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000382:microbiology*; D013293:Enterococcus faecalis / Q000302:isolation & purification*; D004867:Equipment Design; D006801:Humans; D008422:Materials Testing; D008963:Molar / Q000382:microbiology*; D009532:Nickel / Q000737:chemistry; D011897:Random Allocation; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000295:instrumentation*; D012399:Rotation; D012965:Sodium Chloride / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D014094:Tooth, Deciduous / Q000382:microbiology*
chemical_list: D003722:Dental Alloys; D012388:Root Canal Irrigants; C040654:titanium nickelide; D012965:Sodium Chloride; D009532:Nickel; D014025:Titanium; D012973:Sodium Hypochlorite
keywords: Enterococcus faecalis; endodontics; primary dentition; root canal preparation