Department of Prosthodontics, Ilhéus Higher Education Center, Ilhéus, Brazil.
Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
J Esthet Restor Dent. 2021 Jul;33(5):739-749. doi: 10.1111/jerd.12734. Epub 2021 May 15.
To evaluate the influence of surface treatment on roughness (SA), topography, and shear bond strength (SBS) of computer-aided designer and manufacture (CAD/CAM) zirconia-reinforced lithium silicate (ZLS) and feldspathic (FEL) glass-ceramics.
FEL and ZLS specimens were submitted to 5% or 10% hydrofluoric acid (HF) or self-etching ceramic primer (MEP) and different application times (20, 40, and 60 s), or to sandblasting (Control, 20 s). Resin cement cylinders were bonded to the specimens and tested in shear (n = 10) after 24 h and 16-months of water storage. SA and topography were evaluated by atomic force (AFM, n = 10) and scanning electron microscopy. Data were analyzed by ANOVA and Bonferroni test (α = 0.05).
Sandblasting promoted the highest SA for ZLS, but 10% HF (40, 60 s) promoted higher SBS at 16 months. 10% HF produced the highest SA for FEL, but sandblasting and 5% HF (20 s) maintained SBS after 16 months, without differences from 10% HF (20 s) (p > 0.05). Overall, MEP produced lower SA and SBS among groups (p < 0.05). HF displayed greater morphological changes on FEL.
10% HF (40 s) provided better results for ZLS, while 5% or 10% HF (20 s) was suitable for FEL.
Surface treatments influenced SA, topography, and SBS of materials. HF etching is the surface treatment of choice for both CAD/CAM glass-ceramics.
评估表面处理对计算机辅助设计和制造（CAD/CAM）氧化锆增强硅酸锂（ZLS）和长石（FEL）玻璃陶瓷的粗糙度（SA）、形貌和剪切结合强度（SBS）的影响。
FEL 和 ZLS 试件分别用 5%或 10%氢氟酸（HF）或自酸蚀陶瓷底漆（MEP）处理，并分别处理 20、40 和 60 秒，或用喷砂（对照，20 秒）处理。树脂粘结剂圆柱体粘结到试件上，在 24 小时和 16 个月水储存后进行剪切试验（n=10）。原子力显微镜（AFM，n=10）和扫描电子显微镜评估 SA 和形貌。数据采用方差分析和 Bonferroni 检验（α=0.05）进行分析。
喷砂处理使 ZLS 的 SA 最高，但 10% HF（40、60 秒）在 16 个月时促进了更高的 SBS。10% HF 对 FEL 产生了最高的 SA，但喷砂和 5% HF（20 秒）在 16 个月后保持了 SBS，与 10% HF（20 秒）（p>0.05）无差异。总体而言，MEP 组的 SA 和 SBS 较低（p<0.05）。HF 对 FEL 的形态变化较大。
10% HF（40 秒）对 ZLS 效果较好，而 5%或 10% HF（20 秒）适用于 FEL。
表面处理影响材料的 SA、形貌和 SBS。HF 蚀刻是两种 CAD/CAM 玻璃陶瓷的首选表面处理方法。
