Tyagi Shreya, Thomas Abi M, Sinnappah-Kang Neeta Devi
Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, India.
Betty Cowan Research and Innovation Centre, Christian Medical College and Hospital, Ludhiana, India.
Biomater Investig Dent. 2020 Jan 11;7(1):25-30. doi: 10.1080/26415275.2020.1711760. eCollection 2020.
To evaluate and compare the effectiveness of resin- and varnish-based surface protective agents on Glass Ionomer Cement (GIC). The different surface protective agents used were: Vaseline, GC Fuji VARNISH™ (varnish), G-Coat Plus™ (resin) and EQUIA Coat (resin). Thirty-six identical specimens of GIC were made. Six specimens were used in preparation of standard solution and remaining thirty were divided into five groups with six specimens in each group. Each test specimen was coated with one of the surface protecting agent except for the control group. The specimens were immersed separately into 1 ml of 0.05% methylene blue solution for 24 h and then rinsed with deionised water and further immersed into tubes containing 1 ml of 65% nitric acid. Specimens, once completely dissolved in nitric acid solution, were filtered and centrifuged. The supernatant was used to determine the absorbance using a spectrophotometer. The effectiveness of the surface protecting agents for the GIC was recorded in micrograms of dye per specimen, where low values indicate good protection. Tukey HSD test revealed that GC Fuji VARNISH™ (varnish; mean = 21.25 µg/ml), G-Coat Plus™ (resin; mean = 30.39 µg/ml) and EQUIA Coat (resin; mean = 9.32 µg/ml) were statistically not significantly different to each other and were effective in protecting the surface of GIC. The study found that there was a statistically significant difference between control and GC Fuji VARNISH™, G-Coat Plus™ and EQUIA Coat. The three agents were found to be equally effective in protecting the surface of GIC.
评估并比较树脂基和清漆基表面保护剂对玻璃离子水门汀（GIC）的有效性。所使用的不同表面保护剂有：凡士林、GC Fuji VARNISH™（清漆）、G-Coat Plus™（树脂）和EQUIA Coat（树脂）。制作了36个相同的GIC标本。6个标本用于制备标准溶液，其余30个分为五组，每组6个标本。除对照组外，每个测试标本都涂有其中一种表面保护剂。将标本分别浸入1毫升0.05%的亚甲蓝溶液中24小时，然后用去离子水冲洗，再浸入装有1毫升65%硝酸的试管中。标本完全溶解在硝酸溶液后，进行过滤和离心。用上清液通过分光光度计测定吸光度。表面保护剂对GIC的有效性以每个标本中染料的微克数记录，数值越低表明保护效果越好。Tukey HSD检验显示，GC Fuji VARNISH™（清漆；平均值 = 21.25微克/毫升）、G-Coat Plus™（树脂；平均值 = 30.39微克/毫升）和EQUIA Coat（树脂；平均值 = 9.32微克/毫升）在统计学上彼此无显著差异，且在保护GIC表面方面有效。研究发现，对照组与GC Fuji VARNISH™、G-Coat Plus™和EQUIA Coat之间存在统计学显著差异。发现这三种试剂在保护GIC表面方面同样有效。
