Leinfelder K F
School of Dentistry, University of Alabama, Birmingham 35294.
Int Dent J. 1987 Sep;37(3):152-7.
The use of composite resins as posterior restorative materials has been growing at a rapid rate. In spite of major improvements in both physical and mechanical characteristics secondary caries and resistance to wear are still major concerns. This paper deals with the wear rate and patterns of wear of posterior composite resins. Results of long term clinical studies show that a major difference exists between composites containing submicron or supramicron sized filler particles. In general, the wear rates of the larger filler particles composite resins decrease with time. On the other hand, the microfilled posterior composite resins appear to exhibit a linear rate of wear. The wear patterns of the two different types of posterior composite resins are also dissimilar. Composite resins containing filler particles larger than 1 micron tend to undergo a generalized loss of material. The microfilled composite resins also lose material generally but to a lesser degree. Furthermore, the submicron filled posterior composite resins tend to exhibit localized wear, particularly in centric holding areas. Such a change does not, as a rule, occur with composite resins containing larger filler particles. Finally, the microfilled composite resins tend to develop continuous marginal fractures at tooth restoration interfaces.
复合树脂作为后牙修复材料的使用一直在快速增长。尽管在物理和机械性能方面有了重大改进，但继发龋和耐磨性仍然是主要问题。本文探讨了后牙复合树脂的磨损率和磨损模式。长期临床研究结果表明，含有亚微米或超微米尺寸填料颗粒的复合材料之间存在重大差异。一般来说，较大填料颗粒复合树脂的磨损率随时间降低。另一方面，微填料后牙复合树脂似乎呈现线性磨损率。两种不同类型后牙复合树脂的磨损模式也不相同。含有大于1微米填料颗粒的复合树脂往往会出现材料的普遍损失。微填料复合树脂通常也会损失材料，但程度较小。此外，亚微米填料后牙复合树脂往往表现出局部磨损，特别是在正中保持区域。通常，含有较大填料颗粒的复合树脂不会出现这种变化。最后，微填料复合树脂往往会在牙齿修复界面处出现连续的边缘骨折。
