Sriman Janardanan, Chidembaranathan Ahila Singaravel, Balasubramanium Muthukumar
Department of Prosthodontics, SRM Dental College, Bharathi Salai, Ramapuram, Chennai, India.
Front Dent. 2025 Jan 11;22:2. doi: 10.18502/fid.v22i2.17541. eCollection 2025.
The purpose of this study was to investigate the effect of laser etching, air bone particle abrasion and acid etching on shear bond strength between re-cast Nickel Chromium alloy and dental ceramics. A master die was made according to ISO 9693; TR (11406). A total of 40 samples were fabricated with 50%w nickel-chromium alloy and 50%w previously casted nickel-chromium alloy. The samples were divided into four groups based on the surface treatment applied. Group 1 served as the untreated control, Group 2 underwent etching with 10% hydrochloric acid (HCl), Group 3 received surface treatment via air-borne particle abrasion, while Group 4 was conditioned using a pulsed Nd:YAG laser. Shear bond strength between ceramic and metal was tested using a universal testing machine and the mode of debonding was evaluated using scanning electron microscope. The obtained values were statistically analyzed using one-way ANOVA and Tukey's HSD Post Hoc test. The mean values of shear bond strength for Group 1 was 22.69±2.63Mpa, Group 2 was 27.05±2.15Mpa, Group 3 was 34.46±2.46Mpa and Group 4 was 39.54±2.16Mpa. The difference among the groups was significant (P<0.001). Hence there was a statistical difference seen in shear bond strength between control and acid etching, air borne particle abrasion and laser etching. Laser surface conditioning produced more surface roughness compared to acid etching and air bone particle abrasion on re-cast Nickel Chromium alloy which increased the shear bond strength markedly between recast nickel-chromium alloy and dental Ceramic.
本研究的目的是调查激光蚀刻、气磨颗粒喷砂和酸蚀对再铸造镍铬合金与牙科陶瓷之间剪切粘结强度的影响。根据ISO 9693；TR（11406）制作一个母模。用50%重量的镍铬合金和50%重量的预铸造镍铬合金制作了总共40个样本。根据所采用的表面处理方法，将样本分为四组。第1组作为未处理的对照组，第2组用10%盐酸（HCl）进行蚀刻，第3组通过气磨颗粒喷砂进行表面处理，而第4组使用脉冲Nd:YAG激光进行处理。使用万能试验机测试陶瓷与金属之间的剪切粘结强度，并使用扫描电子显微镜评估脱粘模式。使用单因素方差分析和Tukey's HSD事后检验对获得的值进行统计分析。第1组的剪切粘结强度平均值为22.69±2.63MPa，第2组为27.05±2.15MPa，第3组为34.46±2.46MPa，第4组为39.54±2.16MPa。各组之间的差异具有显著性（P<0.001）。因此，在对照组与酸蚀、气磨颗粒喷砂和激光蚀刻之间的剪切粘结强度上存在统计学差异。与再铸造镍铬合金上的酸蚀和气磨颗粒喷砂相比，激光表面处理产生了更大的表面粗糙度，这显著提高了再铸造镍铬合金与牙科陶瓷之间的剪切粘结强度。
