Effect of Different Surface Treatments on the Surface Roughness and Orthodontic Bond Strength of Partially-stabilized Zirconia

• Published in: Meandros medical and dental journal Vol. 23; no. 3; pp. 335 - 342
• Main Authors: Dönmez, Mustafa Borga, Ballı Demirel, Betül, Demirel, Münir, Gündoğdu, Yasemin, Kılıç, Hamdi Şükür
• Format: Journal Article
• Language: English
• Published: Aydın Galenos Publishing House 01.09.2022
• Subjects: Adhesives; Bond strength; Correlation analysis; Etching; Failure; Hypotheses; Lasers; Orthodontics; Variance analysis; Yttrium; Zirconia; Turkey; California; United States > US; Germany; Liechtenstein
• ISSN: 2149-9063; 2149-9063
• DOI: 10.4274/meandros.galenos.2022.23600

Objective: To investigate the effect of different surface treatments on the surface roughness (Ra) and shear bond strength (SBS) of partially stabilized zirconia (Y-PSZ) with different yttrium content. Materials and Methods: Zirconia samples were milled from 5Y-PSZ and 4Y-PSZ disks and divided into 5 groups: Control (C), sandblasting (APA), single-step selfetch primer etching (MEP), Er:YAG laser (ER), and femtosecond laser (FS) irradiation (n=11). Surface Ra was measured and metallic mandibular incisor brackets were bonded. SBS test was performed after thermocycling. Data were analyzed using two-way ANOVA and Tamhane’s T2 tests (α=0.05). Results: Only surface treatment affected Ra and SBS (p<0.001). FS groups had the highest (p<0.001), and C groups had the lowest values Ra (p≤0.001). MEP groups had lower Ra than ER and APA (p≤0.002). FS and APA groups resulted in the highest SBS (p<0.001), while MEP groups achieved significantly higher SBS than ER groups (p<0.001). The C group showed the lowest SBS (p<0.001). Conclusion: Within the limitations of this in vitro study, sandblasting and FS irradiation was found to be the most effective surface treatments for metallic bracket bonding to Y-PSZ.