School of Dentistry, Anhanguera-Uniban University, São Paulo, SP, Brazil.
Braz Oral Res. 2012 May-Jun;26(3):275-81. doi: 10.1590/s1806-83242012005000004. Epub 2012 Mar 20.
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.
本研究旨在评估用树脂复合材料修复后的牙齿的抗折能力。选择 48 颗上颌前磨牙，随机分为六组：G1（对照组）：正常牙；G2：MOD 制备，未修复；G3：MOD+Adper Single Bond 2/P60；G4：MOD+Adper Easy One/P60；G5：MOD+P90 修复系统；G6：MOD+Adper Easy One/P90 Bond/P90。标本进行压缩轴向加载（0.5mm/min）。还测试了弯曲强度和弹性模量（n=7）。只有 G3 与正常牙具有统计学等效性（p<0.05）。所测试的复合材料的弯曲强度和弹性模量不同（n=10）。二类 MOD 制备的前磨牙的抗折能力的重建取决于修复系统。硅烷醇酯修复系统无法恢复抗折能力。
