Effects of colored zirconia surface treatment on the bond strength of veneering ceramics
김사학, 김종견,
소속 상세정보
김사학 ( Kim Sa-Hak ) - Kyungdong University Department of Dental Laboratory Technology
김종견 ( Kim Chong-Kyen ) - Kyungdong University Department of Hotel Management
Abstract
Purpose: In this study, when the etching treatment method, which is a chemical surface treatment method, is applied to colored zirconia, the shear bond strength between the ve-neering ceramic material and colored zirconia is compared with that without surface treat-ment, and the fracture type is observed to evaluate the etching treatment effect of colored zirconia.
Methods: Experiments were conducted after dividing the study sample into two groups, which are the zirconia control group without surface treatment using colored zirconia blocks (without etching zirconia, NZC group) and the zirconia group treated with a commercially available etching solution (etching liquid zirconia, EZC group).
Results: The mean shear bond strength of the NZC group was 20.31±2.32 Mpa, and that of the EZC group was 25.95±2.34 Mpa, and the difference between these two values was statistically significant (p<0.05). Further, the surface roughness Ra value was higher in the EZC group than in the NZC group. In the fracture pattern, cohesive fractures were domi-nant, and adhesive fractures and cohesive fractures were mixed.
Conclusion: The bond strength was significantly higher in the group treated with colored zirconia. The fracture pattern was mostly cohesive failure in the group not treated with etch-ing and changed to mixed failure as the etching treatment progressed.
키워드
Bond strength; Colored zirconia; Etching; Zirconia
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