School of Dentistry, University of Leeds, Leeds, UK.
Materials Science Unit, Dublin Dental University Hospital, Lincoln Place, Trinity College Dublin, Dublin 2, Ireland.
J Dent. 2017 Apr;59:41-47. doi: 10.1016/j.jdent.2017.02.004. Epub 2017 Feb 27.
To investigate the fundamental wear mechanisms of six resin-based composite (RBC) formulations during short-term in vitro wear testing.
RBC materials were condensed into rectangular bar-shaped specimens and light irradiated using the ISO 4049 specimen manufacture and irradiation protocol. Wear testing (n=10 specimens for each RBC) was performed on a modified pin-on-plate wear test apparatus and wear facets were analysed for wear volume loss using a white light profilometer. The wear tested RBC specimens and their corresponding antagonists were analysed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively to determine the wear mechanism.
Data generated using the profilometer showed variations in the mean total wear volume (mm) between the RBCs tested (p<0.05). Abrasive wear was evident in all RBCs investigated with varying degrees of damage. Material transfer/deposition of the filler particles on the corresponding antagonists was evident in two RBC materials (Filtek Supreme and Kalore) indicative of a further adhesive wear mechanism.
It is proposed that the approach employed to use a combination of measurement and analytical techniques to quantify the wear facet volume (profilometry), wear trough (SEM) and material transfer (EDS) provides more useful information on the wear mechanism and the tribology of the system rather than relying on a simple wear ranking for the RBC materials as is routinely the case in dental research studies.
研究六种树脂基复合材料（RBC）配方在短期体外磨损试验中的基本磨损机制。
将 RBC 材料凝聚成矩形棒状试件，并按照 ISO 4049 试件制造和辐照方案用光照射。在改良的销盘磨损试验仪上进行磨损试验（每种 RBC 有 10 个试件），使用白光轮廓仪分析磨损面的磨损体积损失。用扫描电子显微镜（SEM）和能谱仪（EDS）分别分析磨损后的 RBC 试件及其相应的对偶件，以确定磨损机制。
轮廓仪生成的数据显示，所测试的 RBC 之间的平均总磨损体积（mm）存在差异（p<0.05）。所有研究的 RBC 都存在明显的磨料磨损，磨损程度不同。两种 RBC 材料（Filtek Supreme 和 Kalore）的相应对偶件上明显存在填充颗粒的材料转移/沉积，表明存在进一步的粘着磨损机制。
建议采用组合测量和分析技术来量化磨损面体积（轮廓法）、磨损槽（SEM）和材料转移（EDS）的方法，为 RBC 材料的磨损机制和摩擦学提供更有用的信息，而不是像牙科研究中通常那样仅依赖于简单的磨损排序。
