title: Fracture resistance of teeth subjected to internal bleaching and restored with different procedures.
abstract: This study evaluated the fracture resistance of teeth submitted to internal bleaching and restored with different procedures. Forty maxillary incisors were endodontically treated and assigned to 4 groups (n=10): G1- restored with composite resin (CR), G2- bleached with hydrogen peroxide (HP) and restored with CR, G3- restored with CR and fiberglass posts (CR + posts) and G4- bleached and restored with CR + posts. HP was applied in the buccal surface and pulp chamber 3 times at each one of 2 sessions with an interval of 7 days between them. Additional 10 sound incisors were subjected to fracture strength test (gold standard). The fracture strength (kN) was determined in an Instron machine. Data were analyzed by ANOVA and Tukey-Kramer test (α=0.05). The untreated teeth (gold standard) showed the highest (p.
authors.affiliation: Dental School, University of Ribeirão Preto, SP, Brazil.
authors.forename: Roseli Aparecida
authors.initials: RA
authors.lastname: Azevedo
authors.forename: Yara Teresinha Correa
authors.initials: YT
authors.lastname: Silva-Sousa
authors.forename: Aline Evangelista
authors.initials: AE
authors.lastname: Souza-Gabriel
authors.forename: Danielle Cristine Furtado
authors.initials: DC
authors.lastname: Messias
authors.forename: Edson
authors.initials: E
authors.lastname: Alfredo
authors.forename: Ricardo Gariba
authors.initials: RG
authors.lastname: Silva
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D005898:Glass; D006801:Humans; D006861:Hydrogen Peroxide / Q000008:administration & dosage; D011176:Post and Core Technique; D018709:Statistics, Nonparametric; D014073:Tooth Bleaching / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000008:administration & dosage; D014082:Tooth Fractures / Q000209:etiology / Q000517:prevention & control*; D019553:Tooth, Nonvital / Q000503:physiopathology*
chemical_list: D003188:Composite Resins; D058205:Tooth Bleaching Agents; C009753:fiberglass; D006861:Hydrogen Peroxide