title: [Analysis of interappointment flare-ups after root canal preparation with Mtwo NiTi rotary system].
abstract: OBJECTIVE
  To study the interappointment flare-ups after root canal preparation with Mtwo NiTi rotary system and explore the influence factors.
  
  
  METHODS
  Ninty-seven pulp cases caused by caries or invisible cracks which consisted of 37 males and 60 females,16 to 62 years old were selected and divided into 2 groups randomly. One group was treated with Mtwo NiTi rotary system while the other was treated with K file, the interappointment flare-ups after root canal preparation was compared between the 2 groups. The data were subjected to Mann-Whitney U test and X(2) test with SPSS13.0 software package.
  
  
  RESULTS
  Less flare-ups occurred in the group of root canal preparation with NiTi rotary system, the difference was statistically significant (P=0.027).
  
  
  CONCLUSIONS
  Root canal preparation with Mtwo NiTi rotary system could decrease the flare-ups after root canal therapy.
authors: Department of General Dentistry, Shanghai Jiao Tong University School of Medicine, Shanghai, China. hanjunli@sina.com
authors: Jun-li
authors: JL
authors: Han
authors: Hong
authors: H
authors: He
authors: Ya-qin
authors: YQ
authors: Zhu
mesh_terms: D000293:Adolescent; D000328:Adult; D003722:Dental Alloys; D003786:Dental Pulp Cavity; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009532:Nickel; D018915:Root Canal Preparation; D014025:Titanium; D055815:Young Adult
chemical_list: D003722:Dental Alloys; D009532:Nickel; D014025:Titanium