title: [The effects of dentists'performance on the clinical effects of root canal preparation].
abstract: OBJECTIVE
  To evaluate the effects of dentists'performance on the clinical efficacies of root canal preparation.
  
  
  METHODS
  164 teeth, including 66 vital teeth and 98 necrotic pulp teeth , were divided into two groups in random. All the root canals were prepared using ProTaper nickel-titanium rotary by two dentists with junior senior qualification. The incidence of instruments fracture, endodontic interappointment pain (EIP) and successful rates of root canal filling of the two groups were compared by X(2) test with SAS 6.2 software package.
  
  
  RESULTS
  Between the two groups, the difference of the incidence of instruments fracture in molar was significant (P<0.05). The incidence of EIP between the two groups had high significant difference (P<0.01); The difference of vital teeth and necrotic pulp teeth was significant (P<0.05) in junior dentist group. The successful rates of root canal filling had significant differences (P<0.05), especially in necrotic pulp molar teeth.
  
  
  CONCLUSIONS
  Skilled and accurate operation can improve the clinical efficacies of root canal preparation.
authors.affiliation: Department of Stomatology, Shanghai Traditional Chinese Medicine and Western Integrated Hospital, Shanghai 200082, China. swzlym@online.sh.cn
authors.forename: Yu-miao
authors.initials: YM
authors.lastname: Lu
authors.forename: Jia-nan
authors.initials: JN
authors.lastname: Qin
authors.forename: De-jing
authors.initials: DJ
authors.lastname: Cao
mesh_terms: D002983:Clinical Competence; D003722:Dental Alloys; D003786:Dental Pulp Cavity; D003815:Dentists / Q000592:standards*; D004867:Equipment Design; D006801:Humans; D008963:Molar; D009532:Nickel; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000379:methods / Q000592:standards; D014025:Titanium; D014082:Tooth Fractures
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium