Lankes Valerie, Coldea Andrea, Meinen John, Schwendicke Falk, Stawarczyk Bogna
Department of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, Germany.
Department of Conservative Dentistry and Parodontology, University Hospital, LMU Munich, 80336 Munich, Germany.
Materials (Basel). 2024 Nov 25;17(23):5758. doi: 10.3390/ma17235758.
This study evaluated whether airborne-particle abrasion could be an alternative to hydrofluoric acid etching as a pretreatment for the adhesive bonding of silicate ceramic restorations. Feldspar (FEL; n = 100), lithium silicate (LiSi; n = 100), and zirconia (ZrO; (n = 80) substrates were CAD/CAM-fabricated and airborne-particle-abraded with AlO (25 µm or 50 µm of mean particle size) at pressures of 0.05 or 0.1 MPa. The controls included FEL (60 s) and LiSi (20 s) etched with hydrofluoric acid. The surface free energy (SFE) and roughness (Ra) were measured. For the tensile bond strength (TBS), surfaces were conditioned using a primer (Monobond Plus) and luted to a resin composite (Variolink Esthetic). TBS was assessed initially (24 h, 37 °C water storage) and after thermocycling (5/55 °C, 10,000×). Statistical analysis (SPSS, V29) was performed using a one-way ANOVA, post hoc Scheffé, and a two-group -test ( = 0.05). Abrasion with 50 µm and 0.1 MPa induced the highest Ra values across the materials (62.5 ± 3.88 µm). ZrO exhibited a higher TBS (35.4-49.5 MPa) than FEL and LiSi. For aged LiSi, the specimens treated at 0.1 MPa showed a higher TBS (18.7 ± 9.0 MPa) than those treated at 0.05 MPa, regardless of the particle size. The etched and aged FEL showed a higher SFE but a lower TBS compared to abrasion. AlO particle abrasion (25 or 50 µm at 0.1 MPa) may replace etching for silicate-based ceramics, while 50 µm is recommended for ZrO at either pressure.
本研究评估了空气颗粒喷砂处理作为氢氟酸蚀刻的替代方法，用于硅酸盐陶瓷修复体粘结预处理的可行性。通过计算机辅助设计与制造（CAD/CAM）制备了长石（FEL；n = 100）、硅酸锂（LiSi；n = 100）和氧化锆（ZrO；n = 80）基底，并分别在0.05或0.1 MPa压力下，使用平均粒径为25 µm或50 µm的Al₂O₃进行空气颗粒喷砂处理。对照组包括用氢氟酸蚀刻60 s的FEL和蚀刻20 s的LiSi。测量了表面自由能（SFE）和粗糙度（Ra）。对于拉伸粘结强度（TBS），使用一种底漆（Monobond Plus）对表面进行处理，并粘结到树脂复合材料（Variolink Esthetic）上。最初（在37℃水中储存24 h）和热循环后（5/55℃，10000次循环）评估TBS。使用单因素方差分析、事后Scheffé检验和两组t检验（α = 0.05）进行统计分析（SPSS，V29）。50 µm和0.1 MPa的喷砂处理在所有材料中产生了最高的Ra值（62.5 ± 3.88 µm）。ZrO的TBS（35.4 - 49.5 MPa）高于FEL和LiSi。对于老化的LiSi，无论粒径大小，在0.1 MPa下处理的试样的TBS（18.7 ± 9.0 MPa）均高于在0.05 MPa下处理的试样。与喷砂处理相比，蚀刻和老化后的FEL显示出更高的SFE，但TBS更低。Al₂O₃颗粒喷砂处理（0.1 MPa下25或50 µm）可替代基于硅酸盐的陶瓷的蚀刻处理，而对于ZrO，在任一压力下均推荐使用50 µm。
