Moradabadi Ashkan, Roudsari Sareh Esmaeily Sabet, Yekta Bijan Eftekhari, Rahbar Nima
Department of Electrochemistry, Universität Ulm, Ulm, Germany.
Mater Sci Eng C Mater Biol Appl. 2014 Jan 1;34:311-7. doi: 10.1016/j.msec.2013.09.015. Epub 2013 Sep 26.
This paper presents the results of an experimental study to understand the dominant mechanism in bond strength between dental resin agent and zirconia ceramic by investigating the effects of different surface treatments. Effects of two major mechanisms of chemical and micromechanical adhesion were evaluated on bond strength of zirconia to luting agent. Specimens of yttrium-oxide-partially-stabilized zirconia blocks were fabricated. Seven groups of specimens with different surface treatment were prepared. 1) zirconia specimens after airborne particle abrasion (SZ), 2) zirconia specimens after etching (ZH), 3) zirconia specimens after airborne particle abrasion and simultaneous etching (HSZ), 4) zirconia specimens coated with a layer of a Fluorapatite-Leucite glaze (GZ), 5) GZ specimens with additional acid etching (HGZ), 6) zirconia specimens coated with a layer of salt glaze (SGZ) and 7) SGZ specimens after etching with 2% HCl (HSGZ). Composite cylinders were bonded to airborne-particle-abraded surfaces of ZirkonZahn specimens with Panavia F2 resin luting agent. Failure modes were examined under 30× magnification and the effect of surface treatments was analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). SZ and HSZ groups had the highest and GZ and SGZ groups had the lowest mean shear bond strengths among all groups. Mean shear bond strengths were significantly decreased by applying a glaze layer on zirconia surfaces in GZ and SGZ groups. However, bond strengths were improved after etching process. Airborne particle abrasion resulted in higher shear bond strengths compared to etching treatment. Modes of failure varied among different groups. Finally, it is concluded that micromechanical adhesion was a more effective mechanism than chemical adhesion and airborne particle abrasion significantly increased mean shear bond strengths compared with another surface treatments.
本文介绍了一项实验研究的结果，旨在通过研究不同表面处理的效果，了解牙科树脂粘结剂与氧化锆陶瓷之间粘结强度的主导机制。评估了化学和微机械粘附这两种主要机制对氧化锆与粘结剂粘结强度的影响。制备了钇氧化物部分稳定的氧化锆块体试样。制备了七组具有不同表面处理的试样。1）空气颗粒研磨后的氧化锆试样（SZ），2）蚀刻后的氧化锆试样（ZH），3）空气颗粒研磨并同时蚀刻后的氧化锆试样（HSZ），4）涂有一层氟磷灰石-白榴石釉的氧化锆试样（GZ），5）额外进行酸蚀刻的GZ试样（HGZ），6）涂有一层盐釉的氧化锆试样（SGZ），7）用2%盐酸蚀刻后的SGZ试样（HSGZ）。用Panavia F2树脂粘结剂将复合圆柱体粘结到ZirkonZahn试样经空气颗粒研磨的表面上。在30倍放大倍数下检查失效模式，并通过扫描电子显微镜（SEM）和原子力显微镜（AFM）分析表面处理的效果。在所有组中，SZ组和HSZ组的平均剪切粘结强度最高，GZ组和SGZ组最低。在GZ组和SGZ组中，在氧化锆表面施加釉层会显著降低平均剪切粘结强度。然而，蚀刻处理后粘结强度有所提高。与蚀刻处理相比，空气颗粒研磨导致更高的剪切粘结强度。不同组的失效模式各不相同。最后得出结论，微机械粘附是比化学粘附更有效的机制，与其他表面处理相比，空气颗粒研磨显著提高了平均剪切粘结强度。
