Gui Yajie, Zhao Xinyi, Li Shibao, Tang Lihui, Gong Xu
State Key Laboratory of Military Stomatology, Department of Dental Materials, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
State Key Laboratory of Military Stomatology, Department of Dental Materials, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China. Email:
Zhonghua Kou Qiang Yi Xue Za Zhi. 2015 Jan;50(1):28-32.
To evaluate the F(-) releasing and recharging properties of six dental restorative materials.
Disc specimens 10 mm in diameter and 1 mm in thickness were prepared from 6 different dental restorative materials: Fuji VII [glass ionomer cement (GIC)], Fuji II LC (light-curing, GIC), Beautifil (giomer), Compoglass F (compomer), Charisma (composite) and Experimental I (a fluoride releasing composite), with 10 discs for each material. Specimens were dipped in 5 ml deionized water and F(-) release was detected using a fluoride-specific ion electrode every day from 1-7 days and every three days from 8-28 days. On day 28, specimens were exposed to a fluoride foam for 4 min and then dipped in water, then the F(-) concentration was detected every day for a week. The specimens were exposed to fluoride foam and fluoride release was detected repeatedly for three times.
All materials presented the highest F(-) release on the first day after dipping and the F(-) release sharply decreased after 24 h and slowly decreased after 3 days. On the first day, Fuji VII presented the highest F(-) release[(99.68±15.21) µg×cm(-2)×d(-1)], followed by Fuji II LC [(37.12±1.67) µg×cm(-2)×d(-1)], Experimental I [(22.93±1.53) µg×cm(-2)×d(-1)], Compoglass F[(15.28±0.70) µg×cm(-2)×d(-1)], Beautifil[(2.40±0.52) µg×cm(-2)×d(-1)] and Charisma[(0.11±0.02) µg×cm(-2)×d(-1)]. Within 28 days of dipping, both Fuji VII and Fuji II LC released more F(-) than other materials did(P < 0.05), followed by Compoglass F and Experimental I, and Beautifil and Charisma released the least F(-)(P < 0.01). After F(-) uptake, all materials released the highest F- on the first day and presented sharply decrease after 24 h and slowly decrease after 2 days. On the first day after F(-) uptake, Fuji VII presented the highest F(-) release (>40 µg×cm(-2) ×d(-1)), much more than other materials(P < 0.01), followed by Fuji II LC(>25 µg×cm(-2) ×d(-1)). Beautifil, Compoglass F and Experimental I were close in F(-) release value(15- 20 µg × cm(-2) × d(-1)), and Charisma showed the lowest F(-) release.
Two glass ionomers were shown to have highest capacity in F(-) release and uptake, followed by compomer and fluoride releasing composite. Composite demonstrated the lowest F(-) release and uptake and Giomer was comparable to composite in F(-) release and to compomer and fluoride releasing composite in F(-) uptake.
评估六种牙科修复材料的氟离子释放及再充氟性能。
用6种不同的牙科修复材料制备直径10 mm、厚度1 mm的圆盘状试件：富士VII [玻璃离子水门汀（GIC）]、富士II LC（光固化GIC）、Beautifil（聚酸改性复合树脂）、Compoglass F（复合体）、Charisma（复合树脂）和实验I（一种含氟释放复合树脂），每种材料制备10个试件。将试件浸入5 ml去离子水中，在第1至7天每天用氟特异性离子电极检测氟离子释放量，第8至28天每三天检测一次。在第28天，将试件置于氟泡沫中4分钟，然后浸入水中，之后连续一周每天检测氟离子浓度。对试件进行三次氟泡沫处理并重复检测氟离子释放情况。
所有材料在浸入后的第一天氟离子释放量最高，24小时后氟离子释放量急剧下降，3天后缓慢下降。第一天，富士VII的氟离子释放量最高[（99.68±15.21）μg×cm⁻²×d⁻¹]，其次是富士II LC [（37.12±1.67）μg×cm⁻²×d⁻¹]、实验I [（22.93±1.53）μg×cm⁻²×d⁻¹]、Compoglass F [（15.28±0.70）μg×cm⁻²×d⁻¹]、Beautifil [（2.40±0.52）μg×cm⁻²×d⁻¹]和Charisma [（0.11±0.02）μg×cm⁻²×d⁻¹]。在浸入28天内，富士VII和富士II LC释放的氟离子均多于其他材料（P < 0.05），其次是Compoglass F和实验I，Beautifil和Charisma释放的氟离子最少（P < 0.01）。再充氟后，所有材料在第一天释放的氟离子量最高，24小时后急剧下降，2天后缓慢下降。再充氟后的第一天，富士VII的氟离子释放量最高（>40 μg×cm⁻²×d⁻¹），远高于其他材料（P < 0.01），其次是富士II LC（>25 μg×cm⁻²×d⁻¹）。Beautifil、Compoglass F和实验I的氟离子释放量相近（15 - 20 μg×cm⁻²×d⁻¹），Charisma的氟离子释放量最低。
两种玻璃离子水门汀显示出最高的氟离子释放及再充氟能力，其次是复合体和含氟释放复合树脂。复合树脂的氟离子释放及再充氟能力最低，聚酸改性复合树脂的氟离子释放能力与复合树脂相当，再充氟能力与复合体和含氟释放复合树脂相当。
