Wear of Flowable Resin Composite for Posterior Tooth Restoration

本研究的目的是在体外机械加载装置上对可流动树脂复合材料进行后牙修复的两体磨损试验。根据制造商的说明使用每种粘合剂系统对腔体进行处理，并填充每种可流动树脂复合材料（Clearfil Majesty LV:MLV, Estelite Flow Quick:EFQ， Beautifil Flow Plus F00:BF00和MI Fill:MIF）。Clearfil Majesty作为对照。采用机械加载装置对陶瓷触头（氮化铝）进行了体外两体磨损试验。4万次循环加载后，各材料的平均磨损量为：MLV:0.268 mm3, EFQ: 0.140 mm3, BF00:0.008 mm3, MIF: 0.026 mm3，对照组：0.013 mm3。BF00和MIF的填充量虽然低于对照，但在每个加载时间都表现出与对照相当的高耐磨性。

The aim of this study was to examine two-body wear testing of flowable resin composites for posterior tooth restoration, using a mechanical loading device in vitro.The cavities were treated with each adhesive system according to the manufacturer instructions, and filled with each flowable resin composite (Clearfil Majesty LV:MLV, Estelite Flow Quick:EFQ, Beautifil Flow Plus F00:BF00, and MI Fill:MIF). Clearfil Majesty was used as the control. The specimens were subjected to an in vitro two-body wear test using a mechanical loading device at ceramic stylus (Aluminum nitride).The mean wear volume of respective materials after 40,000 cyclic loadings were as follows; MLV:0.268 mm3, EFQ: 0.140 mm3, BF00:0.008 mm3, MIF: 0.026 mm3 and the control: 0.013 mm3. Although their filler amounts were less than that of the control, BF00 and MIF showed high wear resistances equal to that of the control at every loading time.