This study aimed to evaluate the effect of grinding on some surface properties of two lithium disilicate-based glass-ceramics, one experimental new product denominated LaMaV Press (UFSCar-Brazil) and another commercial known as IPS e-max Press (Ivoclar), in the context of simulated clinical adjustment. Discs (N = 24, 12 mm in diameter) were separated into four groups: LaMaV Press with no grinding (E), LaMaV Press after grinding (EG), IPS e-max Press with no grinding (C), and IPS e-max Press after grinding (CG). A 0.1-mm deep grinding was carried out on EG and CG samples (final thickness of 1.4 mm) using a diamond stone in a low-speed device. The E and C samples had the same thickness. The effect of grinding on the sample surfaces was evaluated by X-ray diffraction, mechanical and optical profilometry, scanning electron microscopy, goniometry, and Vickers hardness. The mean roughness (Ra) was evaluated by Kruskal–Wallis and Student–Newman–Keuls statistics. The surface energy (SE) by the sessile drop method and Vickers hardness (VH) were analyzed using two-way ANOVA. The Ra medians were E = 1.69 µm, EG = 1.57 µm, C = 1.45 µm, and CG = 1.13 µm with p = 0.0284. The SE and VH were similar for all materials and treatments. Grinding smoothed the surfaces and did not significantly alter the hardness and surface energy of both LaMaV Press and IPS e-max Press. These glass-ceramics presented similar surface properties, and clinical adjustments can be implemented without loss of performance of both materials.

本研究旨在评估研磨对两种基于二硅酸锂的微晶玻璃的某些表面特性的影响，一种名为 LaMaV Press (UFSCar-Brazil) 的实验性新产品和另一种名为 IPS e-max Press (Ivoclar) 的商业产品，在模拟临床调整的背景。圆盘 ( N = 24, 直径 12 mm) 被分成四组：LaMaV Press 无研磨 (E)、LaMaV Press after 研磨 (EG)、IPS e-max Press 无研磨 (C) 和 IPS e-max Press after研磨（CG）。在低速装置中使用金刚石对 EG 和 CG 样品（最终厚度为 1.4 毫米）进行 0.1 毫米深的磨削。E和C样品具有相同的厚度。通过 X 射线衍射、机械和光学轮廓仪、扫描电子显微镜、测角仪和维氏硬度来评估研磨对样品表面的影响。平均粗糙度 (Ra) 由 Kruskal-Wallis 和 Student-Newman-Keuls 统计评估。使用双因素方差分析分析通过固着滴法得到的表面能 (SE) 和维氏硬度 (VH)。Ra 中位数为 E = 1.69 µm、EG = 1.57 µm、C = 1.45 µm 和 CG = 1.13 µm，其中p  = 0.0284。所有材料和处理的 SE 和 VH 相似。研磨使表面光滑，并没有显着改变 LaMaV Press 和 IPS e-max Press 的硬度和表面能。这些玻璃陶瓷具有相似的表面特性，可以在不损失两种材料性能的情况下进行临床调整。