title: Fracture resistance and primary failure mode of endodontically treated teeth restored with a carbon fiber-reinforced resin post system in vitro.
abstract: OBJECTIVE
  This study was undertaken to characterize the fracture resistance and mode of fracture of endodontically treated incisors restored with cast post-and-core, prefabricated stainless steel post, or carbon fiber-reinforced composite post systems.
  
  
  METHODS
  Ten endodontically treated teeth restored with each technique were subjected to a compressive load delivered at a 130-degree angle to the long axis until the first sign of failure was noted. The fracture load and the mode of fracture were recorded.
  
  
  RESULTS
  The failure loads registered in the three groups were not significantly different. Between 70%, and 80% of teeth from any of the three groups displayed fractures that were located above the simulated bone level.
  
  
  CONCLUSIONS
  The use of carbon fiber-reinforced composite posts did not change the fracture resistance or the failure mode of endodontically treated central incisors compared to the use of metallic posts.
authors.affiliation: Northwestern University Dental School, Chicago, Illinois 60611, USA.
authors.forename: C G
authors.initials: CG
authors.lastname: Raygot
authors.forename: J
authors.initials: J
authors.lastname: Chai
authors.forename: D L
authors.initials: DL
authors.lastname: Jameson
mesh_terms: D000268:Adhesiveness; D000704:Analysis of Variance; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D007180:Incisor / Q000293:injuries; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D012390:Root Canal Therapy / Q000009:adverse effects; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D014082:Tooth Fractures / Q000503:physiopathology*; D019231:Tooth Preparation, Prosthodontic
chemical_list: D000077482:Carbon Fiber; D004396:Coloring Agents; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D006047:Gold Alloys; D013193:Stainless Steel; D002244:Carbon