Department of Restorative Dentistry, Faculty of Dentistry, Marmara University.
Department of Prosthodontics and Dental Materials, School of Dental Medicine, University of Siena.
J Oral Sci. 2024;66(1):42-49. doi: 10.2334/josnusd.23-0166.
To compare the shear-bond-strength (SBS) of a highly-filled-flowable composite (HFFC) and a paste-type composite for indirect composite repair and to evaluate the effect of different surface treatments (ST), concerning the composite repair protocol.
Eighty-four 5 × 5 × 2 mm cylindrical specimens were prepared using Gradia Plus and SR Nexco indirect composite materials. The samples were thermocycled 5,000 times. According to the ST, the samples were divided into three groups (control, bur, and air-abrasion). After ST, the sample subgroups were divided into two sub-groups according to the repair material: paste-type composite and HFFC (n = 7). Another 5,000 cycles of aging were performed. SBS values were measured with a universal testing machine (Shimadzu, Japan). Shapiro-Wilk, 3-way ANOVA, and Tukey HSD test were used to evaluate data (P < 0.05).
ST was considered significant for SBS (P < 0.001). The mean values were (13.9 ± 5.7), (17.0 ± 6.4), (20.4 ± 4.9) MPa for the control, bur and phosphoric acid, and air-abrasion groups, respectively. The surface treatment and repair material interaction was considered significant for SBS (P = 0.044). The highest mean bond strength (24.5 ± 4.5 MPa) was observed for the interaction of SR Nexco, air-abrasion ST, and HFFC repair.
Repairing with HFFC following air abrasion might enhance the SBS for indirect composite restorations.
比较高填充可流动复合树脂（HFFC）和糊状复合树脂用于间接复合修复的剪切粘结强度（SBS），并评估不同表面处理（ST）对复合修复方案的影响。
使用 Gradia Plus 和 SR Nexco 间接复合材料制备 84 个 5×5×2mm 圆柱形试件。样品进行 5000 次热循环。根据 ST，将样品分为三组（对照组、打磨组和喷砂组）。进行 ST 后，根据修复材料将样本亚组分为两组：糊状复合树脂和 HFFC（n=7）。然后进行 5000 次老化循环。使用万能试验机（Shimadzu，日本）测量 SBS 值。使用 Shapiro-Wilk、3 因素方差分析和 Tukey HSD 检验来评估数据（P＜0.05）。
ST 对 SBS 有显著影响（P＜0.001）。对照组、打磨组和磷酸组以及喷砂组的平均 SBS 值分别为（13.9±5.7）、（17.0±6.4）、（20.4±4.9）MPa。表面处理和修复材料的相互作用对 SBS 有显著影响（P=0.044）。观察到 SR Nexco、喷砂 ST 和 HFFC 修复的相互作用时，SBS 的最高平均粘结强度（24.5±4.5MPa）。
喷砂后使用 HFFC 修复可能会提高间接复合修复的 SBS。
