Influence of glass-fiber reinforcement on the flexural strength of different resin composites

• Published in: Applied adhesion science 2015-12, Vol.3 (1), p.1-6, Article 24
• Main Authors: Caixeta, Rodrigo Vieira, Guiraldo, Ricardo Danil, Berger, Sandrine Bittencourt, Kaneshima, Edmilson Nobumitu, Júnior, Élcio Mário Faria, Drumond, Amauri Cruz, Júnior, Alcides Gonini, Lopes, Murilo Baena
• Format: Article
• Language: English
• Subjects: 51st Meeting of the Brazilian Dental Materials Group; Analysis of variance; Biomaterials; Chemistry and Materials Science; Fiber composites; Flexural strength; Glass fiber reinforced plastics; Materials Science; Mechanical Engineering; Modulus of rupture in bending; Polymer matrix composites; Polymers; Resins; Surfaces and Interfaces; Thin Films
• ISSN: 2196-4351; 2196-4351
• DOI: 10.1186/s40563-015-0053-1

Fiber-reinforced composites have recently been advocated as an alternative to fixed metal framework prostheses. The aim of this study was to evaluate the effect of glass-fiber reinforcement on the flexural strength of different resin composites. The tested composites were X-tra fil, Filtek Z350 XT Flow and Filtek Z350 XT commercially available and reinforced with glass-fiber. Six groups of bars specimens (2 × 2 × 20 mm) were prepared (n = 10). The measurement of flexural strength of the resin composites was carried out by the three-point bending test. Data were subjected to ANOVA and post hoc Tukey’s tests (α = 0.05). The flexural strength of all composites was improved when combined with glass fiber. The bulk-fill X-tra fil composite (133.53 MPa) was the strongest fiber-reinforced material. Clinically, fiber reinforcement should be employed in extensive restorations to provide increased flexural strength.