Ersu Bahadir, Yuzugullu Bulem, Ruya Yazici A, Canay Senay
Hacettepe University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
J Dent. 2009 Nov;37(11):848-56. doi: 10.1016/j.jdent.2009.06.017. Epub 2009 Jul 1.
To compare and evaluate effects of CO(2) laser and conventional surface treatments on surface roughness and shear bond strengths of glass-infiltrated alumina-ceramics to dentin.
One hundred fifty ceramic discs of In-Ceram Spinell, In-Ceram Alumina and In-Ceram Zirconia (n=50) were prepared. Specimens which were divided into 5 groups (n=10) were untreated (control group), sandblasted, airborne particle abraded, etched with 9.6% hydrofluoric acid or irradiated with CO(2) laser. Scanning electron microscope was used at 1000x magnification for qualitative examination. Following surface roughness (Ra) determination by profilometry, discs were cemented on extracted-human-molar teeth. Cemented specimens were stored in distilled water at 37 degrees C for 1 week. Shear bond strength (MPa) test was performed using a universal testing machine at a crosshead speed of 1mm/min. Statistical comparisons were made with Wilcoxon signed ranked test, Kruskall Wallis test and Spearman's correlation coefficient.
All surface treatments produced rougher surfaces than the untreated groups of all ceramics (P<.05). Sandblasting demonstrated a rougher surface on In-Ceram Spinell than In-Ceram Alumina and In-Ceram Zirconia (P<.05). While CO(2) laser irradiation showed significantly higher bond strength for In-Ceram Spinell (P<.05), both airborne particle abrasion and CO(2) laser irradiation showed higher bond strengths for In-Ceram Zirconia (P<.05). Airborne particle abrasion demonstrated higher bond strength for In-Ceram Alumina and In-Ceram Zirconia (P<.05). No significant relationship was determined between surface roughness (Ra) and shear bond strength values (MPa) among ceramic groups.
Sandblasting is an effective surface treatment for roughening surfaces of In-Ceram Spinell. Although CO(2) laser irradiation does not increase surface roughness, it reveals the highest bond strength.
比较和评估二氧化碳激光与传统表面处理对玻璃渗透氧化铝陶瓷与牙本质的表面粗糙度和剪切粘结强度的影响。
制备150个In-Ceram Spinell、In-Ceram Alumina和In-Ceram Zirconia陶瓷盘（n = 50）。将样本分为5组（n = 10），分别为未处理组（对照组）、喷砂处理组、空气颗粒研磨处理组、用9.6%氢氟酸蚀刻处理组或二氧化碳激光照射处理组。使用扫描电子显微镜在1000倍放大倍数下进行定性检查。通过轮廓仪测定表面粗糙度（Ra）后，将圆盘粘结在拔除的人磨牙上。粘结后的样本在37℃的蒸馏水中储存1周。使用万能试验机以1mm/min的十字头速度进行剪切粘结强度（MPa）测试。采用Wilcoxon符号秩检验、Kruskall Wallis检验和Spearman相关系数进行统计学比较。
所有表面处理均使所有陶瓷的表面比未处理组更粗糙（P <.05）。喷砂处理显示In-Ceram Spinell的表面比In-Ceram Alumina和In-Ceram Zirconia更粗糙（P <.05）。虽然二氧化碳激光照射显示In-Ceram Spinell的粘结强度显著更高（P <.05），但空气颗粒研磨处理和二氧化碳激光照射均显示In-Ceram Zirconia的粘结强度更高（P <.05）。空气颗粒研磨处理显示In-Ceram Alumina和In-Ceram Zirconia的粘结强度更高（P <.05）。在各陶瓷组中，未确定表面粗糙度（Ra）与剪切粘结强度值（MPa）之间存在显著关系。
喷砂处理是使In-Ceram Spinell表面粗糙化的有效表面处理方法。虽然二氧化碳激光照射不会增加表面粗糙度，但它显示出最高的粘结强度。
