title: Effect of metal collars on resistance of endodontically treated teeth to root fracture.
abstract: Fractures of restored pulpless teeth without reinforcement are a familiar dilemma to the dentist. This study examined the effect of a metal collar with approximate 3 degrees of taper on the resistance of endodontically treated roots to fracture. Teeth without copings failed at a load of 49.6 kg whereas teeth with metal collars failed at a load of 65.29 kg. Our findings indicated that reinforcement with a metal collar is necessary to enhance resistance to root fracture.
authors.affiliation: University of California, School of Dentistry, San Francisco.
authors.forename: R A
authors.initials: RA
authors.lastname: Barkhordar
authors.forename: R
authors.initials: R
authors.lastname: Radke
authors.forename: J
authors.initials: J
authors.lastname: Abbasi
mesh_terms: D003442:Crowns; D003799:Dental Stress Analysis; D006801:Humans; D007180:Incisor; D011176:Post and Core Technique; D012390:Root Canal Therapy; D014082:Tooth Fractures / Q000517:prevention & control*; D014092:Tooth Root / Q000473:pathology*