title: Fracture resistance of teeth restored with different resin-based restorative systems.
abstract: The aim of the present study was to evaluate the fracture resistance of teeth restored with resin composite. Forty-eight maxillary premolar teeth were chosen and randomly divided to six groups: G1 (control): sound teeth; G2: MOD preparation, unrestored; G3: MOD + Adper Single Bond 2/P60; G4: MOD + Adper Easy One/P60; G5: MOD + P90 restorative system; G6: MOD + Adper Easy One/P90 Bond/P90. Specimens were subjected to compressive axial loading (0.5 mm/min). Flexural strength and the modulus of elasticity were also tested (n = 7). The only statistical equivalence with sound teeth was noted for G3 (p < 0.05). Flexural strength and the modulus of elasticity varied among the composites tested (n = 10). The reestablishment of the resistance to fracture in premolars subjected to Class II MOD preparations is restorative-system-dependent. The silorane restorative system is not able to recover the resistance to fracture.
authors.affiliation: School of Dentistry, Anhanguera-Uniban University, São Paulo, SP, Brazil.
authors.forename: Willian Yoshio
authors.initials: WY
authors.lastname: Kikuti
authors.forename: Fernanda Oliveira
authors.initials: FO
authors.lastname: Chaves
authors.forename: Vinicius
authors.initials: V
authors.lastname: Di Hipólito
authors.forename: Flávia Pires
authors.initials: FP
authors.lastname: Rodrigues
authors.forename: Paulo Henrique Perlatti
authors.initials: PH
authors.lastname: D'Alpino
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D013499:Surface Properties; D014082:Tooth Fractures
chemical_list: D003188:Composite Resins