Ebadian Behnaz, Moazami Alireza, Jowkar Mohammad
Department of Prosthodontics, Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Prosthodontics, School of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran.
Front Dent. 2024 Jul 17;21:25. doi: 10.18502/fid.v21i25.16116. eCollection 2024.
Porcelain chipping and delamination are among the shortcomings of all-ceramic restorations. This study aimed to assess the effect of laser irradiation and sandblasting on shear bond strength (SBS) of zirconia to veneering porcelain. In this in vitro, experimental study, 60 zirconia blocks were randomly divided into three groups (n=20) for surface treatment with Er:YAG laser, sandblasting, and no surface treatment (control). Each group was randomly divided into two subgroups (n=10) for porcelain application by the layering or the pressing technique. The surface roughness, SBS, and failure mode were determined and analyzed using two-way ANOVA, Tukey's HSD test, Chi-square test, and Pearson's correlation test (alpha=0.05). The mean SBS was 8.16±3.66 MPa, 9.32±2.7 MPa, and 11.85±3.06 MPa in the control, laser, and sandblasting groups, respectively. The SBS was significantly different among the three groups (P=0.002). The failure mode of the three groups was not significantly different (P>0.05). The sandblasted group showed significantly higher surface roughness than the control and laser groups (P<0.001). Sandblasting yielded higher SBS particularly when the porcelain was applied by the layering technique. Although laser irradiation increased the SBS, the difference with the control group was not statistically significant.
瓷片崩裂和分层是全瓷修复体的缺点之一。本研究旨在评估激光照射和喷砂处理对氧化锆与饰面瓷之间剪切粘结强度（SBS）的影响。在这项体外实验研究中，60个氧化锆块被随机分为三组（n = 20），分别进行Er:YAG激光表面处理、喷砂处理和不进行表面处理（对照组）。每组再随机分为两个亚组（n = 10），分别采用分层技术或压制技术进行瓷修复。使用双向方差分析、Tukey's HSD检验、卡方检验和Pearson相关检验（α = 0.05）对表面粗糙度、SBS和失效模式进行测定和分析。对照组、激光处理组和喷砂处理组的平均SBS分别为8.16±3.66 MPa、9.32±2.7 MPa和11.85±3.06 MPa。三组之间的SBS有显著差异（P = 0.002）。三组的失效模式无显著差异（P>0.05）。喷砂处理组的表面粗糙度显著高于对照组和激光处理组（P<0.001）。喷砂处理可产生更高的SBS，尤其是在采用分层技术施加瓷修复时。虽然激光照射增加了SBS，但与对照组的差异无统计学意义。
