Influence of light irradiation condition on microshear bond strength of dual-cured resin luting agents.
The purpose of this study was to evaluate the microshear bond strength and bond durability between ceramic and two dual-cured resin luting agents irradiated by different light intensities. Ceramic specimens were bonded with two resin bonding systems: Ceramic Primer and Linkmax HV (CP/LMHV) and Monobond S and Variolink IIHV (MBS/VLIIHV), and were either irradiated by 800, 310, 160, 80, and 40 mW/cm2 light or not irradiated. Bond strength was measured after 24-hour water storage at 37 degrees C and after subsequent 10,000 times of thermal cycling. Failure modes were determined by stereomicroscopy. After 24-hour water storage, there were no significant differences among the various irradiation conditions for both MBS/VLIIHV and CP/LMHV. However, regardless of light intensity, MBS/VLIIHV showed higher bond strength than CP/VLIIHV at each thermal cycling, except for no irradiation condition at 10,000 thermal cycles. In conclusion, thermal cycling significantly reduced the bond strength for all groups.
Meng
Xiangfeng
X
Division of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan.
Yoshida
Keiichi
K
Atsuta
Mitsuru
M
D002516:Ceramics / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000528:radiation effects*; D006358:Hot Temperature / Q000009:adverse effects; D019279:Resin Cements / Q000737:chemistry / Q000528:radiation effects*; D033081:Shear Strength
D017220:Dentin-Bonding Agents; D019279:Resin Cements