Gazola Eloá Aguiar, Rego Marcos Augusto, Brandt William Cunha, D'Arce Maria Beatriz Freitas, Liporoni Priscila Christiane Suzy
Department of Restorative Dentistry, University of TaubatéTaubatéSão PauloBrazil.
Department of Implantodology, Santo Amaro UniversitySão PauloSão PauloBrazil.
Acta Biomater Odontol Scand. 2015 Sep 21;1(2-4):66-69. doi: 10.3109/23337931.2015.1084884. eCollection 2015 Dec.
: The aim of this study was to evaluate the Knoop hardness number (KHN) of methacrylate (MC) and silorane (SC) composites after being submitted to erosion and abrasion processes. : Forty samples were made with each composite: MC and SC. The samples were divided into eight groups ( = 10) according to the type of composite (G1-G4, MC; G5-G8, SC) and the beverages involved in the erosion process (G1 and G5 - Control (C), without erosion, with abrasion; G2 and G6 - Orange Juice (OJ), abrasion; G3 and G7 - Smirnoff Ice® (SI), abrasion; G4 and G8 - Gatorade® (GA), abrasion). The KHN test was performed 24 h after the last cycle of erosion/abrasion. : The MC groups showed smaller KHN values for the SI group ( < 0.05) when compared to the Control and OJ groups; however, for the SC groups, no differences were found ( > 0.05). : Methacrylate composite when submitted to acidic beverages erosive challenge combined with abrasive process might alter its surface microhardness. However, the beverages used in the present study were not able to interfere in silorane composite surface microhardness.
本研究的目的是评估甲基丙烯酸酯（MC）和硅氧烷（SC）复合材料在经受侵蚀和磨损过程后的努氏硬度值（KHN）。用每种复合材料制备了40个样品：MC和SC。根据复合材料的类型（G1 - G4，MC；G5 - G8，SC）以及侵蚀过程中涉及的饮料，将样品分为八组（每组n = 10）：G1和G5 - 对照组（C），无侵蚀，有磨损；G2和G6 - 橙汁（OJ），有磨损；G3和G7 - 斯米诺冰锐（SI），有磨损；G4和G8 - 佳得乐（GA），有磨损。在最后一轮侵蚀/磨损循环24小时后进行KHN测试。与对照组和橙汁组相比，MC组中SI组的KHN值较小（P < 0.05）；然而，对于SC组，未发现差异（P > 0.05）。甲基丙烯酸酯复合材料在经受酸性饮料侵蚀挑战并结合磨损过程时，可能会改变其表面显微硬度。然而，本研究中使用的饮料未能干扰硅氧烷复合材料的表面显微硬度。
