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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

Journal of Ceramic Science and Technology, Vol. 16, No. 1 (2025), pp. 45-50

DOI: 10.4416/JCST2024-00029

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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.

Keywords

Tribochemical silica coating, femtosecond laser, nano-hydroxyapatite coating, air-particle abrasion

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