Department of Dental Materials and Fixed Prosthodontics of Siena, University of Florence and Siena, Italy.
J Adhes Dent. 2013 Apr;15(2):123-30. doi: 10.3290/j.jad.a28362.
To assess the shear bond strength to unground human enamel (ESBS) and flexural strength (FS) of different reinforcing fibers used in combination with a flowable composite resin.
For ESBS testing, 90 human molars were selected and randomly divided into 9 groups (n = 10) according to the reinforcing fiber to be tested: 1. RTD Quartz Splint additionally impregnated at chairside with Quartz Splint Resin (RTD); 2. RTD Quartz Splint without additional impregnation; 3. Ribbond-THM (Ribbond) impregnated with OptiBond FL Adhesive; 4: Ribbond Triaxial (Ribbond) impregnated with OptiBond FL Adhesive; 5. Connect (Kerr) impregnated with OptiBond FL Adhesive; 6. Construct (Kerr) impregnated with Opti- Bond FL Adhesive; 7. everStick PERIO (Stick Tech); 8. everStick C&B (Stick Tech); 9. nonreinforced composite Premise flowable (Kerr). Cylinders of flowable composite reinforced with the fibers were bonded to the intact buccal surface of the teeth. After 24 h of storage, shear loading was performed until failure occurred. FS was assessed performing three-point bending test according to ISO Standard 4049/2000. ESBS and FS data were analyzed using one-way ANOVA, followed by Tukey's HSD test for post-hoc comparisons (p < 0.05).
For each group, the ESBS and FS, respectively, in MPa were: 1. 17.07 ± 4.52 and 472.69 ± 30.49; 2. 14.98 ± 3.92 and 441.77 ± 61.43; 3. 18.59 ± 5.67 and 186.89 ± 43.89; 4. 16.74 ± 6.27 and 314.41 ± 148.52; 5. 14.38 ± 4.14 and 223.80 ± 77.35; 6. 16.00 ± 5.55 and 287.62 ± 85.91; 7. 16.42 ± 3.67 and 285.35 ± 39.68; 8. 23.24 ± 5.81 and 370.46 ± 29.26; 9. 12.58 ± 4.76 and 87.75 ± 22.87. For most fibers, no significant difference in ESBS was found compared to the control group, except for everStick C&B, which yielded higher ESBS. Nonreinforced composite exhibited the lowest FS, while all fibers positively affected the FS.
Fiber reinforcement of flowable composite does not affect its ESBS. The flexural strength of FRCs is significantly influenced by fiber composition and pattern.
评估不同增强纤维与流动复合树脂联合使用时对未经打磨的人牙釉质的剪切粘结强度（ESBS）和弯曲强度（FS）。
为了进行 ESBS 测试，选择 90 个人类磨牙，根据要测试的增强纤维随机分为 9 组（n = 10）：1. RTD Quartz Splint 在用椅旁 Quartz Splint Resin（RTD）进行额外浸渍；2. 未经额外浸渍的 RTD Quartz Splint；3. Ribbond-THM（Ribbond）用 OptiBond FL 胶粘剂浸渍；4：Ribbond 三轴（Ribbond）用 OptiBond FL 胶粘剂浸渍；5. Connect（Kerr）用 OptiBond FL 胶粘剂浸渍；6. Construct（Kerr）用 Opti-Bond FL 胶粘剂浸渍；7. everStick PERIO（Stick Tech）；8. everStick C&B（Stick Tech）；9. 非增强型复合 Premise 流动性（Kerr）。用纤维增强的流动复合树脂制成的圆柱体被粘合到牙齿完整的颊侧表面上。在储存 24 小时后，进行剪切加载，直到发生故障。根据 ISO 标准 4049/2000 进行三点弯曲试验以评估 FS。使用单向方差分析对 ESBS 和 FS 数据进行分析，然后进行 Tukey 的 HSD 检验进行事后比较（p < 0.05）。
对于每个组，分别为 ESBS 和 FS，单位为 MPa：1. 17.07 ± 4.52 和 472.69 ± 30.49；2. 14.98 ± 3.92 和 441.77 ± 61.43；3. 18.59 ± 5.67 和 186.89 ± 43.89；4. 16.74 ± 6.27 和 314.41 ± 148.52；5. 14.38 ± 4.14 和 223.80 ± 77.35；6. 16.00 ± 5.55 和 287.62 ± 85.91；7. 16.42 ± 3.67 和 285.35 ± 39.68；8. 23.24 ± 5.81 和 370.46 ± 29.26；9. 12.58 ± 4.76 和 87.75 ± 22.87。对于大多数纤维，与对照组相比，ESBS 没有明显差异，除了 everStick C&B，它的 ESBS 更高。未增强的复合材料表现出最低的 FS，而所有纤维都对 FS 产生了积极的影响。
流动复合树脂的纤维增强不会影响其 ESBS。纤维增强复合材料的弯曲强度受纤维组成和模式的显著影响。
