Osiewicz Magdalena A, Werner Arie, Roeters Franciscus J M, Kleverlaan Cornelis J
Department of Integrated Dentistry, Jagiellonian University, Krakow, Poland.
Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
Front Bioeng Biotechnol. 2025 Mar 27;13:1545026. doi: 10.3389/fbioe.2025.1545026. eCollection 2025.
In patients with severe wear, the performance of restorative materials is challenging, especially in load-bearing thin restorations. In this study, we aimed to investigate the wear rate in thin-layered restoration (1.5 mm) compared to more bulky restorations (3 mm), where less deformation and stress within the material are expected.
The wear rates of four resin-based composites were measured using one layer of 3-mm thickness compared to a thin-layered specimen of 1.5-mm composite, which was supported by a flexible layer of 1.5-mm silicone impression material. Two- and three-body wear were measured using the ACTA wear device. Scanning electron microscopy analysis was performed to detect the surface alterations. One- and two-way ANOVA and Tukey's test were used to analyze differences in wear values.
The two-body wear of the 1.5-mm specimens was significantly higher (p < 0.001) than that of the 3-mm specimens. The increase in the wear rate between the 1.5-mm and 3-mm specimens can be attributed to fatigue wear. The three-body wear of the 1.5-mm Heliomolar (HMR) specimens was significantly higher than that of the 3-mm HMR specimens. However, for the three-body wear, there was no significant difference between the 1.5-mm and 3-mm specimens of Clearfil AP-X and Clearfil Majesty ES-2.
The results of this study show for the first time that fatigue wear plays a role in the wear mechanism of thin (1.5 mm) dental resin-based composites. Therefore, the deformation of restorations under loading should be minimized by avoiding thin restorations and flexible conditions and using resin-based composites with high E-moduli.
在重度磨损患者中，修复材料的性能面临挑战，尤其是在承受负荷的薄修复体中。在本研究中，我们旨在研究与更厚的修复体（3毫米）相比，薄层修复体（1.5毫米）的磨损率，预计后者材料内部的变形和应力更小。
使用一层3毫米厚的树脂基复合材料与一层1.5毫米厚的复合材料薄层样本（由1.5毫米厚的硅橡胶印模材料柔性层支撑）测量四种树脂基复合材料的磨损率。使用ACTA磨损装置测量双体和三体磨损。进行扫描电子显微镜分析以检测表面变化。使用单因素和双因素方差分析以及Tukey检验分析磨损值的差异。
1.5毫米样本的双体磨损显著高于3毫米样本（p < 0.001）。1.5毫米和3毫米样本之间磨损率的增加可归因于疲劳磨损。1.5毫米的Heliomolar（HMR）样本的三体磨损显著高于3毫米的HMR样本。然而，对于三体磨损，Clearfil AP-X和Clearfil Majesty ES-2的1.5毫米和3毫米样本之间没有显著差异。
本研究结果首次表明，疲劳磨损在薄（1.5毫米）牙科树脂基复合材料的磨损机制中起作用。因此，应通过避免薄修复体和柔性条件，并使用具有高弹性模量的树脂基复合材料，将修复体在负荷下的变形降至最低。
