The aim of this study was to investigate the bonding properties of metal orthodontic brackets and surface modifications applied to the surface of zirconia samples. Zirconia samples were divided into 4 groups according to surface modifications: group I, Er:YAG laser; group II, Nd:YAG laser, group III, air abrasion with silica-coated aluminum oxide; and group IV, hydrofluoric acid. After the application of surface modifications, central incisor brackets were bonded to zirconia surface and then subjected to thermocycling 2000× between 5 and 55 °C. The bonding properties of each sample were evaluated using a universal testing machine. The nonparametric Kruskal–Wallis and Mann–Whitney U statistical tests were applied to analyze the significant differences among and between the groups. The results showed that surface modifications significantly affected shear bond strength. Shear bond strength of group III (7.42 MPa) was significantly higher than those of other groups. Group IV (3.58 MPa) was significantly lower than those of other groups. Group III seems to be the most suitable surface treatment to be applied to zirconium surfaces in terms of high bond strength and safety. Group II and group III can be considered as more suitable alternatives group IV.

这项研究的目的是研究金属正畸托槽的粘结性能以及应用于氧化锆样品表面的表面改性。根据表面改性，氧化锆样品分为4组：第一组，Er：YAG激光；第二组，Er：YAG激光；第二组。II组，Nd：YAG激光器，III组，二氧化硅涂层氧化铝对空气的磨损；和第四类，氢氟酸。进行表面改性后，将中切牙支架粘结到氧化锆表面，然后在5至55°C之间进行2000℃的热循环。使用通用测试机评估每个样品的粘合性能。非参数Kruskal–Wallis和Mann–Whitney U进行统计学检验以分析组之间和组之间的显着差异。结果表明，表面改性显着影响剪切粘结强度。第三组的剪切粘结强度（7.42 MPa）显着高于其他组。第四组（3.58 MPa）显着低于其他组。就高结合强度和安全性而言，III族似乎是最适合应用于锆表面的表面处理。II组和III组可被视为IV组的更合适替代方案。