title: A retrospective clinical evaluation of success rate in endodontic-treated premolars restored with composite resin and fiber reinforced composite posts.
abstract: BACKGROUND
  The aim of this retrospective study was to assess the survival rate and causes of failure of quartz fiber posts used to restore endodontically treated teeth.
  
  
  METHODS
  Thirty-eight patients with endodontically treated premolar and anterior teeth that were then restored with a coronoradicular quartz fiber post and extensive composite resin restorations were selected for participation in the study. The age of the restorations ranged from 1 to 6 years. Survival probabilities of the restorations as well as causes of failures were analyzed using the Kaplan-Meier analysis and the Logistic regression (α = 0.05).
  
  
  RESULTS
  The overall cumulative survival rate (48.8%) was determined, while the survival probabilities after 1, 2, 4, 5, and 6 years of service were 88.37%, 60.95%, 45.71%, 32.65%, and 0%, respectively.
  
  
  CONCLUSIONS
  The survival probability of endodontically treated teeth restored with a quartz fiber post and composite restorations is associated with the dental arch.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Marjaneh
authors.initials: M
authors.lastname: Ghavamnasiri
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Maleknejad
authors.forename: Hamideh
authors.initials: H
authors.lastname: Ameri
authors.forename: Mohammad Javad
authors.initials: MJ
authors.lastname: Moghaddas
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Farzaneh
authors.forename: Joseph E
authors.initials: JE
authors.lastname: Chasteen