title: Comparison of fracture resistance in post restorations in primary maxillary incisors.
abstract: OBJECTIVE
  This in vitro study aimed to test the fracture resistance of 4 different posts used in the restoration of severely decayed primary incisors.
  
  
  METHODS
  Fifty primary incisors were selected for this study and sectioned 1 mm above the CEJ. After filing and irrigation of the root canal space, the canals were obturated with Metapex and 3 mm of post space was prepared inside the canals. Intact glass fiber posts, split-ended glass fiber posts, composite resin posts, and orthodontic γ 'gamma' wire posts were used as intracanal posts and the final composite resin restoration was placed using a paediatric strip crown. After thermocycling of the specimens, the fracture resistance was measured using a universal testing machine.
  
  
  RESULTS
  The mean fracture resistance of split- ended glass fiber posts was higher than the other groups, however, there was no significant difference between any of the groups (P>0.05).
  
  
  CONCLUSIONS
  Split-ended glass fiber posts seem to be a more appropriate option for full coverage restorations in primary incisors.
authors.affiliation: Department of Pediatric Dentistry, School of Dentistry, Qazvin University of Medical Sciences.
authors.forename: A
authors.initials: A
authors.lastname: Baghalian
authors.affiliation: Department of Pediatric Dentistry, School of Dentistry, Qazvin University of Medical Sciences.
authors.forename: M
authors.initials: M
authors.lastname: Ranjpour
authors.affiliation: Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: T
authors.initials: T
authors.lastname: Hooshmand
authors.affiliation: New York University College of Dentistry, New York, USA.
authors.forename: N G
authors.initials: NG
authors.lastname: Herman
authors.affiliation: Department of Pediatric Dentistry, School of Dentistry, Qazvin University of Medical Sciences.
authors.forename: A
authors.initials: A
authors.lastname: Ebrahimi
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D003731:Dental Caries / Q000628:therapy*; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000295:instrumentation; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005898:Glass / Q000737:chemistry; D006801:Humans; D007180:Incisor / Q000473:pathology*; D008422:Materials Testing; D008437:Maxilla; D011176:Post and Core Technique / Q000295:instrumentation*; D018915:Root Canal Preparation / Q000379:methods; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors; D014094:Tooth, Deciduous / Q000473:pathology*
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C009753:fiberglass; D013193:Stainless Steel