Effect of pre-curing of two universal adhesives on the shear bond strength of resin cement to zirconia
10.14815/kjdm.2019.46.1.21
- Author:
Ga Eun SON
1
;
Tae Yub KWON
;
Young Kyung KIM
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Korea. wisekim@knu.ac.kr
- Publication Type:Original Article
- Keywords:
Pre-curing;
Primer;
Shear Bond Strength;
Universal Adhesives;
Zirconia
- MeSH:
Adhesives;
Aging;
Ceramics;
Incidence;
Resin Cements;
Water
- From:
Korean Journal of Dental Materials
2019;46(1):21-32
- CountryRepublic of Korea
- Language:English
-
Abstract:
This study aimed to investigate whether pre-curing the universal adhesives affect the resin bonding to zirconia ceramic. Two commercial universal adhesives (All-Bond Universal, ABU; Single Bond Universal Adhesive, SBU) were tested in comparison with a conventional zirconia primer (Z-Prime Plus, ZPP). Air-abraded zirconia specimens were divided into six groups, to which different priming agents were applied with or without photo-polymerization. After resin cylinders were built on the primed zirconia surface using a resin cement (Duo-Link), all bonded specimens were stored in water at 37℃ for 24 hours and half of them (n = 12) were additionally thermocycled 5,000 times. A shear bond strength test was performed at a crosshead speed of 0.5 mm/minute and failure modes were assessed using an optical microscope at 25× magnification. Before thermocycling, the light-cured specimens of ABU and SBU showed higher bond strengths than the uncured ones of the materials (p<0.05), whereas no significant difference was found between the pre-cured and uncured specimens of ZPP (p > 0.05). After thermal aging, there were significant decreases in the bond strength for all specimens treated with the universal adhesives (p<0.05). However, ZPP produced no significant difference after aging (p > 0.05) and attained higher bond strength values for both the pre-cured and uncured specimens when compared to the two universal adhesives (p<0.05). Adhesive failures were predominant in all test groups and thermocycling resulted in the higher incidences of adhesive failures for the uncured groups, which was not shown in the pre-cured groups.
