Okutan Yener, Kandemir Banucicek, Gundogdu Yasemin, Kilic Hamdi Sukur, Yucel Munir Tolga
Faculty of Dentistry, Department of Prosthodontics, Aydın Adnan Menderes University, Aydın, Turkey.
Faculty of Dentistry, Department of Prosthodontics, Selcuk University, Konya, Turkey.
J Biomed Mater Res B Appl Biomater. 2021 Apr;109(4):596-605. doi: 10.1002/jbm.b.34741. Epub 2020 Oct 18.
This study aimed to investigate the effects of femtosecond laser (Fs) and/or air-abrasion protocols on surface roughness (Ra) of zirconia and resin bond strength. Eighty zirconia samples were randomly divided into eight subgroups according to surface treatment protocols: Control (C), Air-abrasion before sintering (ABS), Air-abrasion after sintering (AAS), Air-abrasion before and after sintering (ABS + AAS), Fs laser before sintering (FBS), Fs laser before sintering + air-abrasion after sintering (FBS + AAS), Fs laser after sintering (FAS), and Fs laser after sintering + air-abrasion after sintering (FAS + AAS). Measurements of Ra values were obtained using a surface profilometer. Surface morphological properties were evaluated with scanning electron microscopy (SEM), and crystallographic changes were examined by X-Ray diffractometry (XRD). Self-adhesive resin cement was bonded to zirconia samples, and shear bond strength (SBS) tests were performed. The data were statistically analyzed by one-way ANOVA, followed by Tamhane tests. The control group displayed the lowest Ra and SBS values among all groups. The highest Ra and SBS values were found in the FBS and FBS + AAS groups. Air-abrasion applied before sintering significantly increased the Ra of specimens. FAS, FAS + AAS, and ABS + AAS groups exhibited higher SBS values than AAS and ABS (p < .05). Air-abrasion applied after Fs laser did not produce any significant change in the Ra and SBS compared to Fs laser alone (p > .05). Femtosecond laser application may be a promising method to enhance the surface roughness of zirconia and improve resin bond strength. Air-abrasion at pre- and post-sintered stages may also be a viable surface treatment option.
本研究旨在探究飞秒激光（Fs）和/或空气喷砂处理方案对氧化锆表面粗糙度（Ra）及树脂粘结强度的影响。根据表面处理方案，将80个氧化锆样本随机分为8个亚组：对照组（C）、烧结前空气喷砂（ABS）、烧结后空气喷砂（AAS）、烧结前后空气喷砂（ABS + AAS）、烧结前Fs激光处理（FBS）、烧结前Fs激光处理 + 烧结后空气喷砂（FBS + AAS）、烧结后Fs激光处理（FAS）以及烧结后Fs激光处理 + 烧结后空气喷砂（FAS + AAS）。使用表面轮廓仪测量Ra值。通过扫描电子显微镜（SEM）评估表面形态特性，并通过X射线衍射仪（XRD）检测晶体结构变化。将自粘结树脂水门汀粘结到氧化锆样本上，并进行剪切粘结强度（SBS）测试。数据采用单因素方差分析进行统计分析，随后进行Tamhane检验。对照组在所有组中显示出最低的Ra和SBS值。在FBS和FBS + AAS组中发现了最高的Ra和SBS值。烧结前进行空气喷砂显著增加了样本的Ra。FAS、FAS + AAS和ABS + AAS组的SBS值高于AAS和ABS组（p < 0.05）。与单独使用Fs激光相比，在Fs激光处理后进行空气喷砂在Ra和SBS方面未产生任何显著变化（p > 0.05）。飞秒激光应用可能是一种有前景的方法，可提高氧化锆的表面粗糙度并改善树脂粘结强度。烧结前和烧结后的空气喷砂也可能是一种可行的表面处理选择。
