【摘要】 目的通过氟电极测定法测定3种正畸粘结剂的氟释放量。方法共30份试样分为3组,每组10份。分别把试样充填在一个塑料的环形板上,用探针去尽模板边缘溢出的树脂。待粘结剂完全硬固后,将标本放置10 mL去离子水中。在实验的1、2、3、4、5、6、7、14、21、28、35 d通过氟离子选择电极测试氟离子的释放量。结果 3组材料释放的氟离子量不同,玻璃离子粘结剂(TP Orthodontics,美国)氟释放量最大。复合固化玻璃离子粘结剂(3M,美国)与Rely-a-bond(Reliance Orthodontic,美国)的氟离子释放量没有统计学差异。结论传统玻璃离子粘结剂、树脂增强型玻璃离子粘结剂、可释放氟树脂粘结剂都可以长期释放氟离子。更多还原

【Abstract】 Objective The aim of this study was to estimate the amount of fluoride released from three different bonding adhesives by ion selective electrode method. Methods Thirty samples 10mm in diameter and 1 mm in height were divided into 3 groups with 10 in each group. The samples were separately filled into a plastic annular plate,and probes were used to remove overflowing resin at the edge of the mold. After the bonding adhersives were cured,they were stored in 10ml deionized water. The fluoride analysis were carried out using the ion specific electrode for first seven days and then at every week end for four subsequent weeks. Results There was significant difference among three materials in the amount of released fluoride. Glass inomer cement( TP Orthodontics,USA) released the highest amount of fluoride. There was no significant difference between complex curing glass inomer cement( 3M,USA) and Rely-abond( Reliance Orthodontic,USA) in the amount of released fluoride. Conclusions All the three bonding adhesives( traditional glass inomer cement,resin reinforced glass inomer cement,and fluoride releasable resin cement) prove to be effective long-term fluoride releasing materials.更多还原