Shear bond strength between orthodontic metal brackets and Y-TZP according to the various ceramic surface treatments before and after thermocycling
10.14815/kjdm.2020.47.2.83
- Author:
Ji-Bong CHOI
1
;
Seon-Mi BYEON
Author Information
1. Department of Dental Biomaterials and Institute of Biodegradable material, Institute of Oral Bioscience and BK21 Plus Project, School of Dentistry, Chonbuk National University, Jeonju-si, Republic of Korea
- Publication Type:Original Article
- From:
Korean Journal of Dental Materials
2020;47(2):83-92
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
In this study, clinically applicable methods of improving the bond strength between Y-TZP and the bracket were considered, which the method was confirmed for the durability in a humid oral environment. The bond strength of Y-TZP bonding surface and the surface characteristics were analyzed following the surface treatment of Y-TZP specimens with conditioning by 30 μm tribochemical silica coating, or tribochemical silica coating with one of the following primers: silane, MDP, or an MDP-containing silane primer. It was found that after surface treatment, the surface roughness of all groups increased (p<0.05), and Si was uniformly distributed on the Y-TZP surface after silica coating. The bond strength value of the group treated with silane primer and tribochemical coating was not significantly different after thermocycling (p>0.05). The group treated with MDP primer and tribochemical silica coating showed a significant difference in bond strength values after thermocycling (p<0.05), and it showed the lowest bond strength values except the untreated groups (p<0.05). The group treated with tribochemical silica coating and MDP-containing silane primer showed the highest bond strength values (p<0.05), and was not significantly different after thermocycling (p>0.05). Therefore, the surface treatments of Y-TZP with MDP-containing silane primer after 30 μm tribochemical silica coating enhanced the bond strength to the orthodontic metal bracket; such a clinically applicable method may advance studies on the surface treatment of Y-TZP.
