title: [Application of hand-use ProTaper instruments in endodontic treatment of molar canals].
abstract: OBJECTIVE
  To evaluate the application of hand-use ProTaper instruments in endodontic treatment of molar canals.
  
  
  METHODS
  A total of 203 permanent molars were randomly divided into the experimental group (99 molars) and control group (104 molars) prepared by hand-use ProTaper instruments and standard stainless steel K-file, respectively. The molars in the two groups were obturated by cold lateral condensation technique. The root canal preparation and obturation were evaluated by radiograph, and the working time of preparation and post-operative emergencies were analyzed.
  
  
  RESULTS
  The preparation time in the experimental group was obviously shorter than that in the control group (P<0.01). The rate of satisfactory effect was significantly higher in the experimental group than in the control group (P<0.01), and the rate of post-operative emergencies was significantly lower in the experimental group (P<0.01).
  
  
  CONCLUSIONS
  The application of hand-use ProTaper instruments may improve the effect of root canal treatment of the molars and shorten the working time and reduce the post-operative emergencies.
authors.affiliation: Department of Stomatology, First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510008, China. msq_kq @163.com
authors.forename: Sui-qi
authors.initials: SQ
authors.lastname: Ma
authors.forename: Qian
authors.initials: Q
authors.lastname: Xie
authors.forename: Yin-feng
authors.initials: YF
authors.lastname: Zhou
mesh_terms: D000328:Adult; D003762:Dental Instruments; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar; D018915:Root Canal Preparation / Q000379:methods*; D055815:Young Adult