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Surface Roughness and Shear Bond Strength of Y-TZP Treated via Tri-Biochemical Silica Coating, Femtosecond Laser, and Nano-Hydroxyapatite: An SEM assessment
F. Alkhudhairy, N.N. Shono
Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
received November 8, 2024, received in revised form November 25, 2024, accepted November 25, 2024
Vol. 16, No. 1, Pages 45-50 DOI: 10.4416/JCST2024-00029
Abstract
AIMS: Efficacy of the recent surface pretreating techniques Tribochemical silica coating (TBC), Femtosecond laser (FS), and Nano-hydroxyapatite (HA) coating in influencing the surface roughness (Ra) and shear bond strength (SBS) of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) bonded to resin luting cement. MATERIALS AND METHODS Eighty-four Y-TZP zirconia discs were prepared followed by grouping based on the conditioning agent (n= 16) Group 1 (APA) (Control), Group 2 (TBC), Group 3 (FS laser), and Group 4 (Nano-HA coating). Surface roughness evaluation was performed on five discs from each group using a profilometer and surface topography was assessed using SEM analysis. Bonding of luting cement on ten specimens in each group was followed by SBS and fracture mode analysis using a universal testing machine and stereomicroscope. One-way ANOVA and post hoc Tukey compared the means of Ra and SBS among different tested groups (p < 0.05) RESULTS The maximum roughness (1421.26 ± 0.062 µm) and SBS (18.34 ± 0.16 MPa) were exhibited by Group 4 (Nano-HA coating). However, Group 2 (TBC) presented the lowest Ra (1 000.57 ± 0.043 µm) and bond strength (14.54 ± 0.09 MPa) CONCLUSION Nano-hydroxyapatite coating and Femtosecond laser can be used as a suitable alternative to air particle abrasion without affecting the physical and mechanical properties of zirconia ceramic.
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Keywords
Tribochemical silica coating, femtosecond laser, nano-hydroxyapatite coating, air-particle abrasion
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