[氟释放对含氟复合材料弯曲强度的影响]
[Effect of fluoride release on flexural strength of fluoride-containing composites].
作者信息
Wang X, Gao X, Wang J
机构信息
Department of Operative Dentistry, Cariology and Endodontology, Peking University School of Stomatology, Beijing 100081, China.
出版信息
Zhonghua Kou Qiang Yi Xue Za Zhi. 2001 Sep;36(5):379-81.
OBJECTIVE
To study fluoride release and its impact on flexural strength of fluoride-containing composites.
METHODS
Experimental composite resins containing 0.3%, 0.6% and 1.2% fluoride (w/w) respectively and non-fluoride control composites were selected, including a compomer and its control composites. The amount of fluoride release in vitro was determined with fluoride ion-sensitive electrode in a 30 day consecutive period. The flexural strength was measured by Autograph Machine before and after releasing fluoride in water.
RESULTS
The amount of fluoride release increased (0, 21.98, 43.98 and 99.91 micrograms.cm-2 respectively) and the flexural strength decreased (101.70, 94.29, 82.03 and 79.84 MPa respectively) while fluoride-contents in resins increased (0%, 0.3%, 0.6% and 1.2% respectively). With fluoride release, the flexural strength decreased significantly (P < 0.05).
CONCLUSION
Fluoride release affects mechanical properties of fluoride-containing composites.
目的
研究含氟复合材料的氟释放及其对弯曲强度的影响。
方法
分别选取含0.3%、0.6%和1.2%氟（重量/重量）的实验复合树脂以及不含氟的对照复合材料，包括一种复合体及其对照复合材料。在连续30天的时间内，使用氟离子敏感电极测定体外氟释放量。在水中释放氟前后，用自动绘图机测量弯曲强度。
结果
随着树脂中氟含量的增加（分别为0%、0.3%、0.6%和1.2%），氟释放量增加（分别为0、21.98、43.98和99.91微克·厘米-2），弯曲强度降低（分别为101.70、94.29、82.03和79.84兆帕）。随着氟的释放，弯曲强度显著降低（P < 0.05）。
结论
氟释放会影响含氟复合材料的力学性能。
Zotero 插件