Effect of Clinical Sandblasting on the Surface Roughness of Zirconia Cores for all Ceramic Crowns and their Fracture Resistance after the Addition of Repair.


  • Mohammed Thamir Yassin University of Sulaimani, college of Dentistry.
  • Shatha Abdullah Salih Department of Conservative Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraq.




Aluminum-oxide, Intra-oral repair, Sandblasting, Silica, Surface Roughness, Zirconia


Objective: This in vitro study aims to evaluate the effect of clinical sandblasting with 50 μm aluminum oxide and 30 μm silica-coated particles on the surface roughness of zirconia cores and
the subsequent effect on their fracture resistance after veneering with composite using a specific repair kit.
Materials and Methods: Zirconia cores (n=21) were digitally designed and milled from ZirCAD
LT B1 (IPS e.max® ZirCAD ) blocks using arum 5x-300 Pro (ARUM DENTISTRY). These cores were
randomly divided into three groups: Group A: n=8, sandblasted with 50 μm aluminum oxide,
and veneered with packable Z350 composite. Group B: n=8, sandblasted with 30 μm silicacoated particles and veneered with packable Z350 composite. Group C: control group (n=5),
sandblasted in the laboratory with 110 μm aluminum oxide and veneered with porcelain
(Vintage Zr PRO - SHOFU Dental GmbH). All the specimens were tested for surface roughness by
the TAYLOR-HOBSON profilometer. After adding veneering material, all the specimens were
subjected to a fracture resistance test through a universal testing machine.
Results: One-way ANOVA test showed a significantly higher surface roughness in group B compared to group A. Fracture resistance values showed no significant difference between all the
Conclusion: Silica-coated particles produced higher surface roughness than aluminum oxide
alone. The fracture resistance values of all the groups were above the acceptable clinical limit.


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How to Cite

Yassin MT, Salih SA. Effect of Clinical Sandblasting on the Surface Roughness of Zirconia Cores for all Ceramic Crowns and their Fracture Resistance after the Addition of Repair. EDJ [Internet]. 2023 Dec. 22 [cited 2024 Jul. 25];6(2):193-202. Available from: https://edj.hmu.edu.krd/index.php/journal/article/view/238



Original Articles