Niem Thomas, Gonschorek Stefan, Wöstmann Bernd
Department of Prosthodontics, Justus-Liebig University, Schlangenzahl 14, 35392 Giessen, Germany.
Polymers (Basel). 2022 Jan 26;14(3):493. doi: 10.3390/polym14030493.
The aim of the present study was to evaluate and quantify the damping properties of common resin-based computer-aided design and computer-aided manufacturing (CAD/CAM) restorative materials (CRMs) and assess their energy dissipation abilities. Leeb hardness (), together with its deduced energy dissipation data (), and loss tangent values recorded via dynamic mechanical analysis (DMA) were determined for six polymer, four composite, and one ceramic CRM as well as one metal. Data were statistically analyzed. Among resin-based CRMs, the significantly highest data were detected for the fiber-reinforced composite FD ( < 0.001) directly followed by the filler-reinforced Ambarino High Class ( < 0.001). The significantly lowest values were observed for the polymer-based CRM Telio CAD ( < 0.001). For loss tangent, both PEEK materials showed the significantly lowest data and the polymer-based M-PM the highest results with all composite CRMs in between. data, which simultaneously record the energy dissipation mechanism of plastic material deformation, more precisely characterize the damping behavior of resin-based CRMs compared to loss tangent results that merely describe viscoelastic material behavior. Depending on material composition, resin-based CRMs reveal extremely different ratios of viscoelastic damping but frequently show enhanced values because of plastic material deformation. Future developments in CAD/CAM restorative technology should focus on developing improved viscoelastic damping effects.
本研究的目的是评估和量化常见的树脂基计算机辅助设计与计算机辅助制造（CAD/CAM）修复材料（CRMs）的阻尼特性，并评估其能量耗散能力。测定了六种聚合物、四种复合材料、一种陶瓷CRMs以及一种金属的里氏硬度（）及其推导的能量耗散数据（），以及通过动态力学分析（DMA）记录的损耗角正切值。对数据进行了统计分析。在树脂基CRMs中，纤维增强复合材料FD的 数据显著最高（<0.001），其次是填料增强的Ambarino High Class（<0.001）。基于聚合物的CRM Telio CAD的 值显著最低（<0.001）。对于损耗角正切，两种聚醚醚酮材料的数据显著最低，而基于聚合物的M-PM最高，所有复合CRMs的数据介于两者之间。 数据同时记录了塑性材料变形的能量耗散机制，与仅描述粘弹性材料行为的损耗角正切结果相比，能更精确地表征树脂基CRMs的阻尼行为。根据材料组成，树脂基CRMs显示出极其不同的粘弹性阻尼比，但由于塑性材料变形，其 值经常会提高。CAD/CAM修复技术的未来发展应侧重于开发改进的粘弹性阻尼效果。
