title: A core fracture with all-ceramic crowns: a case report.
abstract: This article is an observational-descriptive type case study with references to recent literature on ceramic fracture. The case selected was an unusual incidence of a veneer-to-core fracture of a Procera AllCeram crown after 18 months of service. This unusual case represents a significant concern to general dentists, because the highly dense alumina core is supposed to show comparable fracture resistance to the metal cores of conventional metal-ceramic crowns. Clinical evidence shows that bruxism, manufacturing defects, pre-cementation occlusal adjustment by the laboratory technician or dentist, and the cement used are factors that contribute to the fracture of ceramic cores.
authors.affiliation: Department of Oral Health Sciences, University of British Columbia, Vancouver, Canada.
authors.forename: Leslie C T
authors.initials: LC
authors.lastname: Chew
authors.forename: Chris C
authors.initials: CC
authors.lastname: Wyatt
authors.forename: Nigel M
authors.initials: NM
authors.lastname: King
mesh_terms: D000328:Adult; D003442:Crowns; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D006801:Humans; D008297:Male; D008334:Mandible; D008963:Molar; D014082:Tooth Fractures / Q000628:therapy*
chemical_list: D003776:Dental Porcelain