Fiber-reinforced epoxy resin has been utilized as dentin-analogue material in fatigue tests, owing to their similar resin adhesion and biomechanical behavior. The procedures for finishing the dental surface change the surface topography, promoting variable roughness in the prepared substrate, which influences the interaction between the resin cement and the bonding surface. This study evaluated the influence of finishing by grinding the bonding surface of dentin analogue material (epoxy resin) on the fatigue behavior of adhesively cemented lithium disilicate glass-ceramic simplified restorations. Epoxy resin discs (Ø = 10 mm, thickness = 2 mm) were allocated into four groups considering the “grinding” factor: CTRL – no grinding; G – grinding with coarse grit diamond bur; G + F – grinding with coarse grit diamond bur followed by fine grit diamond bur; G + F + FF – grinding with coarse grit diamond bur followed by fine and extra fine grit diamond burs. After grinding, the discs were cleaned, etched (10% hydrofluoric acid; 1 min) and received a primer coating. Lithium disilicate discs (Ø = 10 mm, thickness = 1 mm) were also etched (5% hydrofluoric acid; 20 s) and received a silane agent, and then were adhesively cemented onto epoxy resin discs and subjected to a step-stress fatigue tests at 20 Hz, 10,000 cycles/step with a step-size of 100 N. Fractography, surface topography, roughness and fractal dimension analyses were performed. The CTRL group showed the lowest fatigue performance, roughness and surface area values. No statistical difference for fatigue performance and surface area was observed among the ‘grinding’ groups, having a decreasing roughness relationship (G > G + F > G + F + FF). Therefore, the grinding the preparation surface with distinct diamond bur sequence has no effect on the fatigue behavior of lithium disilicate restorations, as well as, grinding promotes improved results over a non-ground surface. Thus, it is important to pay attention to managing the dentin analogue surface considering that the epoxy resin with unground surfaces induces lower fatigue behavior.

纤维增强环氧树脂由于其相似的树脂粘合性和生物力学性能，已在疲劳测试中用作牙本质类似材料。修整牙齿表面的程序会改变表面的形貌，从而在制备的基材中产生不同的粗糙度，这会影响树脂胶粘剂与粘结表面之间的相互作用。这项研究评估了通过磨蚀牙本质类似物（环氧树脂）的粘结表面的精加工对粘结的二硅酸锂玻璃-陶瓷简化修复体的疲劳行为的影响。考虑到“磨削”因素，将环氧树脂圆盘（Ø= 10 mm，厚度= 2 mm）分为四组：CTRL –不磨削；G –用粗砂砾金刚石车针磨削；G + F –先用粗砂轮，然后用细砂轮打磨；G + F + FF –先用粗砂轮，然后再打磨细砂轮和超细砂轮。研磨后，将圆盘清洗，蚀刻（10％氢氟酸； 1分钟）并涂上底漆。还对二硅酸锂圆盘（Ø= 10 mm，厚度= 1 mm）进行蚀刻（5％氢氟酸； 20 s）并加入硅烷试剂，然后将其胶粘到环氧树脂圆盘上，并进行分步应力疲劳试验以20 Hz的频率进行10,000次循环/步，步长为100N。进行了分形，表面形貌，粗糙度和分形维数分析。CTRL组的疲劳性能，粗糙度和表面积值最低。在“研磨”组之间，未观察到疲劳性能和表面积的统计差异，粗糙度关系减小（G> G + F> G + F + FF）。因此，以不同的金刚石bur顺序研磨制备物表面对二硅酸锂修复体的疲劳行为没有影响，并且研磨可在非研磨表面上改善结果。因此，考虑到具有未研磨表面的环氧树脂引起较低的疲劳行为，重要的是要注意管理牙本质类似物表面。研磨可以改善非地面上的结果。因此，考虑到具有未研磨表面的环氧树脂引起较低的疲劳行为，重要的是要注意管理牙本质类似物表面。研磨可以改善非地面表面的结果。因此，考虑到具有未研磨表面的环氧树脂引起较低的疲劳行为，重要的是要注意管理牙本质类似物表面。