title: Effect of dentinal bonded resin post-core preparations on resistance to vertical root fracture.
abstract: An in vitro study was conducted to compare the resistance to failure of two restorative protocols for endodontically treated teeth. Half of 24 specimens received cemented cast post-core restorations and the other half were restored with dentin-bonded composite resin using the ferric oxalate, NTG-GMA, and the PMDM system developed by Bowen. The dentin-bonded resin post-core restorations provided significantly less resistance to failure than the cemented custom cast post-core. The dentin-bonded resin post-core fractured in every instance before the root fractured. A greater force was required to cause failure of the resin post as the cross-sectional area of the post increased.
authors.affiliation: Naval Dental School, National Naval Dental Center, Bethesda, Md.
authors.forename: R T
authors.initials: RT
authors.lastname: Bex
authors.forename: M W
authors.initials: MW
authors.lastname: Parker
authors.forename: J T
authors.initials: JT
authors.lastname: Judkins
authors.forename: G B
authors.initials: GB
authors.lastname: Pelleu
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003799:Dental Stress Analysis; D003804:Dentin; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates; D011176:Post and Core Technique; D012117:Resins, Synthetic / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D014082:Tooth Fractures / Q000503:physiopathology*; D014092:Tooth Root / Q000293:injuries*
chemical_list: D000180:Acrylic Resins; D003738:Dental Cements; D008689:Methacrylates; D008768:Methylmethacrylates; D012117:Resins, Synthetic; D017438:Bisphenol A-Glycidyl Methacrylate; C034578:Duralay; C039790:N-(4-tolyl)glycine-glycidyl methacrylate