Kobayashi Mikihiro, Koi Kiyono, Wiskoski Sarah, Watanabe Hidehiko, Lewis Steven, Ferracane Jack L
Department of Oral Rehabilitation and Biosciences, School of Dentistry, Oregon Health & Science University, Portland, Oregon, USA.
Department of Conservative Dentistry, Division of Aesthetic Dentistry and Clinical Cariology, School of Dentistry, Showa University, Tokyo, Japan.
J Esthet Restor Dent. 2023 Dec;35(8):1286-1292. doi: 10.1111/jerd.13105. Epub 2023 Jul 14.
This study aimed to isolate the relationship between filler size and the surface properties of roughness and gloss before and after toothbrush abrasion for experimental resin-based composites (RBCs) containing uniform spherical fillers.
Five experimental light-cured RBCs with different spherical filler sizes and three commercial RBCs were studied. Forty specimens were polished using silicon carbide papers. Gloss was measured after 0, 90, 180, and 360 min of simulated toothbrushing, and surface roughness was measured before and after 360 min of toothbrushing. Two-way ANOVA/Tukey's multiple comparison tests were used to compare the RBCs, and the correlation between particle size and surface roughness or gloss was also determined.
After polishing and toothbrushing, RBCs with smaller fillers exhibited significantly higher gloss and lower surface roughness, and RBCs with larger fillers exhibited lower gloss and higher surface roughness. A significant correlation was found between filler particle size and gloss and surface roughness both before and after toothbrush abrasion.
Gloss of RBCs containing fillers with larger particle sizes was significantly reduced. After toothbrushing abrasion, the surface roughness increased for all RBCs, except those containing the finest-sized fillers. The particle size of the filler is a critical determinant of the surface roughness and gloss of RBCs, after polishing and after toothbrushing.
Increased surface roughness caused by toothbrush abrasion reduces the gloss of resin-based composites. Resin-based composites containing finer fillers best maintain glossiness after routine tooth brushing.
本研究旨在分离出含均匀球形填料的实验性树脂基复合材料（RBCs）在牙刷磨损前后填料尺寸与粗糙度和光泽度等表面性能之间的关系。
研究了五种具有不同球形填料尺寸的实验性光固化RBCs和三种市售RBCs。使用碳化硅砂纸对40个样本进行抛光。在模拟刷牙0、90、180和360分钟后测量光泽度，并在刷牙360分钟前后测量表面粗糙度。使用双向方差分析/图基多重比较检验来比较RBCs，还确定了粒径与表面粗糙度或光泽度之间的相关性。
抛光和刷牙后，填料较小的RBCs表现出明显更高的光泽度和更低的表面粗糙度，而填料较大的RBCs表现出更低的光泽度和更高的表面粗糙度。在牙刷磨损前后，填料粒径与光泽度和表面粗糙度之间均存在显著相关性。
含较大粒径填料的RBCs的光泽度显著降低。刷牙磨损后，除了含最细粒径填料的RBCs外，所有RBCs的表面粗糙度均增加。填料的粒径是决定RBCs在抛光后和刷牙后的表面粗糙度和光泽度的关键因素。
牙刷磨损导致的表面粗糙度增加会降低树脂基复合材料的光泽度。含较细填料的树脂基复合材料在常规刷牙后最能保持光泽度。
