MSciD Graduate Program, School of Dentistry, Meridional Faculty - IMED, Passo Fundo, Rio Grande do Sul State, Brazil.
MSciD-PhD Postgraduate Program, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil.
J Mech Behav Biomed Mater. 2019 Mar;91:287-293. doi: 10.1016/j.jmbbm.2018.12.024. Epub 2018 Dec 21.
This study evaluated the effect of two antagonist substrates (Y-TZP/zirconia or stainless steel) on the wear rate and surface alterations of different composite materials and bovine tooth substrates (enamel and dentin). The wear rate of different composite materials (n = 20; two direct composite resins: HelioMolar - HM; Clearfil AP-X - CAP, three indirect composite resins: Estenia C&B - EST; Adoro - ADO; Sinfony - SFY, and one composite resin for direct/indirect restorations: Filtek Z250 - Z250), bovine enamel and dentin against two different antagonist materials (zirconia or stainless steel) into two mediums (two-body and three-body wear) were collected. After wear tests on ACTA wear machine, Scanning Electron Microscopy (SEM) analysis was performed to access the surface alterations. The wear data were evaluated by three-way ANOVA and Tukey post-hoc test (α = 0.05). The factors 'antagonist', 'medium', 'restorative materials', and the interaction of all factors grouped by two and integrated showed statistical significance on the wear rates. A two-body test depicted no difference among all composites and enamel for wear rate, while a three-body test depicted differences among composites directly related to the filler content: EST < Z250 = CAP < ADO = HM < SFY. Dentin always showed the highest wear rates and enamel the lowest rates. The presence of food bolus (three-body test) led to higher wear rates in comparison to an only aqueous medium (two-body test). SEM analysis showed that different materials present specific wear patterns, regardless of the medium and the antagonist considered. Differently from enamel, dentin substrate was intensively prone to wear, regardless of the antagonist/medium. Resin composite substrates presented intermediate wear rates, depending directly on their filler content (% in weight).
本研究评估了两种拮抗剂基底（Y-TZP/氧化锆或不锈钢）对不同复合材料和牛牙基底（牙釉质和牙本质）的磨损率和表面变化的影响。收集了不同复合材料（n=20；两种直接复合树脂：HelioMolar-HM；Clearfil AP-X-CAP，三种间接复合树脂：Estenia C&B-EST；Adoro-ADO；Sinfony-SFY，一种直接/间接修复用复合树脂：Filtek Z250-Z250）、牛牙釉质和牙本质与两种不同拮抗剂材料（氧化锆或不锈钢）在两种介质（二体和三体磨损）中的磨损率。在 ACTA 磨损机上进行磨损试验后，进行扫描电子显微镜（SEM）分析以评估表面变化。使用三因素方差分析和 Tukey 事后检验（α=0.05）对磨损数据进行评估。因素“拮抗剂”、“介质”、“修复材料”以及按二项和综合分组的所有因素的相互作用对磨损率具有统计学意义。二体试验中，所有复合材料和牙釉质的磨损率无差异，而三体试验中，与填料含量直接相关的复合材料之间存在差异：EST<Z250=CAP<ADO=HM<SFY。牙本质的磨损率始终最高，牙釉质的磨损率最低。与仅含水介质（二体试验）相比，含食物团块（三体试验）导致磨损率更高。SEM 分析表明，无论介质和考虑的拮抗剂如何，不同材料都具有特定的磨损模式。与牙釉质不同，牙本质底物无论拮抗剂/介质如何，都容易受到磨损。树脂复合基底的磨损率居中，这直接取决于其填料含量（重量百分比）。
