Hammouda Ibrahimm M, Al-Wakeel Essam E
Dental Biomaterials and ; Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt.
J Biomed Res. 2011 Jul;25(4):254-8. doi: 10.1016/S1674-8301(11)60034-1.
We evaluated the effect of water storage on fluoride release and mechanical properties of compomer restorative material. Fluoride release was recorded using a specific fluoride electrode. Flexural properties and fracture toughness were measured using a universal testing machine. Vickers hardness was measured using a micro-hardness tester. There was initial burst of fluoride release up to 1 w, which was diminished to a low level in 1 mon and remained relatively constant over 6 mon. Flexural strength and hardness were increased up to 1 mon followed by a gradual decrease up to 6 mon. Flexural modulus was decreased gradually up to 6 mon. Fracture toughness was increased during the first week and gradually decreased over the storage period. We concluded that flexural properties, fracture toughness, Vickers hardness and fluoride release of compomer were sensitive to water as well as storage time. There was a significant effect of fluoride release on the studied mechanical properties.
我们评估了储水对复合树脂修复材料氟释放和力学性能的影响。使用特定的氟电极记录氟释放情况。使用万能试验机测量弯曲性能和断裂韧性。使用显微硬度计测量维氏硬度。在1周内有氟释放的初始爆发，在1个月时降至低水平，并在6个月内保持相对稳定。弯曲强度和硬度在1个月时增加，随后在6个月内逐渐降低。弯曲模量在6个月内逐渐降低。断裂韧性在第一周增加，并在储存期内逐渐降低。我们得出结论，复合树脂的弯曲性能、断裂韧性、维氏硬度和氟释放对水和储存时间敏感。氟释放对所研究的力学性能有显著影响。
