title: Fracture behavior of pontics of fiber-reinforced composite fixed dental prostheses.
abstract: To evaluate the load-bearing capacities and failure mechanisms of FRC FDPs using shell-shaped acrylic denture teeth as pontics with different composite resins as filling materials. Eighty-four inlay-retained FDPs with FRC frameworks were made using shell-shaped posterior artificial teeth as pontics. Different composite resins were used as filling materials to complete the shape of the pontics. Four groups (n=21/group) were formed based on the filling material. Each group was subdivided into three subgroups and tested at 90º and 30°. Each FDP was statically loaded from the pontic until the final fracture. ANOVA revealed statistically significant differences in the load-bearing capacities according to filling material, angle and storage (p<0.01). The fracture propagated from the fiber-rich part of the pontic towards the occlusal surface of the FDP. The filling material influenced the load-bearing capacities of FRC FDPs with shell-shaped denture teeth used as pontics.
authors.affiliation: Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku.
authors.forename: Leila
authors.initials: L
authors.lastname: Perea
authors.forename: Jukka P
authors.initials: JP
authors.lastname: Matinlinna
authors.forename: Mimmi
authors.initials: M
authors.lastname: Tolvanen
authors.forename: Pekka K
authors.initials: PK
authors.lastname: Vallittu
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D003779:Denture Design; D016379:Denture, Partial, Fixed, Resin-Bonded; D008422:Materials Testing
chemical_list: D003188:Composite Resins; D003764:Dental Materials