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The Effect of Surface Treatment on Hardness and Shear Bond Strength between Ceramic and 3-Yttrium Zirconia | ||
| Tikrit Journal for Dental Sciences | ||
| Volume 13, Issue 2, December 2025, Pages 531-541 PDF (488.84 K) | ||
| DOI: 10.25130/tjds.13.2.24 | ||
| Authors | ||
| Mustafa Ahmad Abdulla* ; Nada Z. Mohammed | ||
| Department of Prosthodontic, College of Dentistry, University of Mosul, Mosul, Iraq | ||
| Abstract | ||
| Background: The veneer chipping from zircon core is one of the elements driving ongoing research. Two types of 3Y zirconia is mostly used as a core in both anterior and posterior region according to their indications, covered by veneering ceramics and need strong bond force. Aim: To reveal effects of the surface treatments on the shear bond strength and hardness of 3Y zirconia to veneering porcelain. Materials and methods : 80 zirconia samples were used in this study , 40 samples of (Dentaldirekt DD Z ) 3Y high-alumina zirconium core, another 40 samples were made of (Dentaldirekt DD ZX ) ,3Y low-alumina. Each type were subdivided into two groups: 20 micro-rods (5*25*1.5 mm) in size were created for hardness test , 5 samples for each type of surface treatments(5 samples laser, 5 samples acid etching ,5 samples for sandblasting and 5 samples as a control group). The other subgroup zirconia specimens (diameter of 7 mm\ height: 3 mm) for shear bond strength test, 5 for each type of surface treatments. 6W Er;Cr:YSGG as a laser surface treatment was used and 9.5 % Hydrofluric acid was used as acid etching. 120 μm alumina used for sandblasting. Results: Hardness test was showed no statistical difference between surface treatments groups and control group. While shear bond strength test was showed that laser and acid etching a rise in shear bond strength. Conclusion: Surface treatments did not affect the Hardness while laser and acid etching improve zirconia shear bond strength to veneering ceramic. | ||
| Keywords | ||
| zirconia core; veneering ceramic; surface treatments; shear bond; hardness | ||
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