ELUTION OF LEACHABLE COMPONENTS FROM COMPOSITES
ELUTION OF LEACHABLE COMPONENTS FROM COMPOSITES
复制标题
DOI：
10.1111/j.1365-2842.1994.tb01158.x
复制
发表时间：
1994-07-01
影响因子：
2.9
通讯作者：
FERRACANE, JL
中科院分区：
文献类型：
--
作者：
FERRACANE, JL
在固定的复合材料中，大量的残余单体或短链聚合物仍未结合。由于其对修复体的生物相容性和结构稳定性的潜在影响，许多研究者研究了这些未结合分子在水介质中的洗脱。这些研究的结果表明，复合材料中可浸出成分的洗脱速度很快，大多数在几小时内就被释放出来。据报道，在某些条件下，复合材料的重量损失可达其质量的2%。研究还表明，组分从复合材料中洗脱的程度和速率取决于几个因素。浸出物的数量与聚合物网络的固化程度有关。萃取溶剂的组成和溶解度特性影响萃取过程的动力学和机理。洗脱通常被认为是通过分子在树脂基质中的扩散而发生的，因此取决于可浸出物质的大小和化学特性。
A significant amount of residual monomer or short chain polymers remain unbound in set composite material. Due to its potential impact on both the biocompatibility and the structural stability of the restoration, many investigators have studied the elution of these unbound molecules into aqueous media. The results of these studies suggest that elution of leachable components from composites is rapid, with the majority being released within a matter of hours. Weight losses of up to 2% of the mass of the composite have been reported under certain conditions. The studies have also shown that the extent and rate of elution of components from composites is dependent upon several factors. The quantity of leachables has been correlated to the degree of cure of the polymer network. The composition and solubility characteristics of the extraction solvent influence the kinetics and mechanism of the elution process. Elution is generally thought to occur via diffusion of molecules through the resin matrix, and is therefore dependent upon the size and chemical characteristics of the leachable species.