Fracture resistance of teeth restored with different resin-based restorative systems

• Main Authors: Willian Yoshio Kikuti (Author), Fernanda Oliveira Chaves (Author), Vinicius Di Hipólito (Author), Flávia Pires Rodrigues (Author), Paulo Henrique Perlatti D'Alpino (Author)
• Format: Book
• Published: Sociedade Brasileira de Pesquisa Odontológica, 2012-06-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 1806-8324
• Keywords: Compressive Strength; Dentin-Bonding Agents; Dental Restoration, Permanent; Dentistry; RK1-715
• Source: Brazilian Oral Research, Vol 26, Iss 3, Pp 275-281 (2012)

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.