title: [Clinical study on preventing endodontic interappointment pain with dexamethasone].
abstract: OBJECTIVE
  To investigate the effect decreasing of the incidence of endodontic interappointment pain(EIP) by local injection of 5 mg dexamethasone.
  
  
  METHODS
  5 mg dexamethasone was injected submucosally at apical region of 80 teeth with asymtomatic pulp necrosis after root canal therapy, then observing the incidence of EIP and compared with control group.
  
  
  RESULTS
  The clinical observation revealed that the incidence of EIP of dexamethasone group (10.00%) was lower than that of control group (33.75%), P < 0.01, and the level of pain was decreased. Ordinal logistic regression revealed that EIP was related to tooth location, fistula, and root canal therapy.
  
  
  CONCLUSIONS
  The incidence of EIP can be reduced after 5 mg dexamethasone local injected.
authors.affiliation: Department of Oral Medicine, School of Stomatology, Sun Yat-sen University of Medical Sciences, Guangzhou 510060, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Ouyang
authors.forename: Z
authors.initials: Z
authors.lastname: Tang
authors.forename: S
authors.initials: S
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D003907:Dexamethasone / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012390:Root Canal Therapy; D014098:Toothache / Q000517:prevention & control*
chemical_list: D003907:Dexamethasone