, Tehran, Iran.
Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Canada.
BMC Oral Health. 2022 Jul 30;22(1):317. doi: 10.1186/s12903-022-02347-3.
The effect of nanofilled resin-based coating on the wear resistance of glass ionomer cements (GICs) is still controversial. This study aims to compare the wear resistance of four encapsulated GICs including two conventional and two resin-modified, and to evaluate the effect of G-Coat Plus on the wear resistance of GICs.
A total of 80 disk-shaped specimens were prepared from two CGICs (riva self cure (SDI) and Equia Forte Fil (GC) and two RM- GICs (Ketac Nano (3 M/ESPE) and Fuji II LC (GC). The specimens of each material were divided into two groups (n = 10) based on the surface protection: no coating (NC), and coating with G-Coat Plus (GCP). All specimens were then placed in distilled water for 24 h at 37 °C. The specimens were subjected to thermocycling for 120,000 cycles using a chewing simulator. Wear resistance was measured using a specific formula. Data was analyzed using Kruskal-Wallis test.
There was no significant difference in volume loss (mm) between coated and uncoated groups for all materials (P > 0.05). Ketac Nano showed significantly lower volume loss (0.65 ± 0.12) compared to all other groups (P < 0.05) among uncoated specimen, and significantly lower than Fuji II LC (P = 0.035) and Equia Forte Fil (P = 0.040) among coated groups. However, no statically significant difference was observed between volume loss of coated Ketac Nano with that of riva self cure (P = 0.087).
Coating with GCP did not affect the wear depth of GICs, and Ketac Nano showed significantly lower volume loss regardless of coating.
纳米复合树脂基涂层对玻璃离子水门汀（GIC）耐磨性的影响仍存在争议。本研究旨在比较四种包埋 GIC 的耐磨性，包括两种传统型和两种树脂改性型，并评估 G-Coat Plus 对 GIC 耐磨性的影响。
从两种 CGIC（riva self cure（SDI）和 Equia Forte Fil（GC）和两种 RM-GIC（Ketac Nano（3M/ESPE）和 Fuji II LC（GC）中制备总共 80 个圆盘形试件。根据表面保护情况，将每种材料的试件分为两组（n=10）：无涂层（NC）和 G-Coat Plus（GCP）涂层。所有试件随后在 37°C 的蒸馏水中放置 24 小时。使用咀嚼模拟器对试件进行 120,000 次热循环。使用特定公式测量耐磨性。使用 Kruskal-Wallis 检验分析数据。
对于所有材料，涂层组和未涂层组的体积损失（mm）之间没有显著差异（P>0.05）。未涂层试件中，Ketac Nano 的体积损失明显低于其他所有组（0.65±0.12）（P<0.05），与涂层组中的 Fuji II LC（P=0.035）和 Equia Forte Fil（P=0.040）相比也显著更低。然而，涂层的 Ketac Nano 与 riva self cure 的体积损失之间未观察到统计学显著差异（P=0.087）。
GCP 涂层不会影响 GIC 的磨损深度，并且无论是否涂层，Ketac Nano 的体积损失都明显更低。
