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Surface Topographic Variations and Shear Bond Strength of 3Y-TZP Treated with Al₂O₃ and Nd: YAG-lasers Operating at Short Pulse

S. Alresayes

Journal of Ceramic Science and Technology, Vol. 16, No. 2 (2025), pp. 101-106

DOI: 10.4416/JCST2025-00002

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Abstract

Aim Influence of sandblasting (SB), hydrofluoric acid (HFA) and neodymium-yttrium aluminum garnet (Nd: YAG) laser working @nanosecond (ns) level on the surface roughness (Ra) and shear bond strength (SBS) of yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) bonded to resin cement.Methods 64 3Y-TZP discs were prepared and allocated into four groups based on the surface pretreatment method used (n = 16) Group 1 (No conditioning), Group 2 (SB), Group 3 (10% HFA gel) and Group 4 (ns-Nd: YAG laser). SEM was used to evaluate the surface topography following different conditioning regimes. Ra analysis was assessed on five discs from each group with a surface profilometer. Resin cement bonding was performed on ten specimens from each cohort and underwent thermocycling. SBS and failure mode were analyzed using a universal testing machine and stereomicroscope respectively. ANOVA and post hoc Tukey test were used for statistical analysis (p 

Keywords

Sandblasting, Nd:YAG laser, surface condition, SEM, failure assessment, 3Y-TZP.

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