Objectives: Newly developed adhesives are striving to obtain both adequate bond strength and simplicity of clinical procedure. The purpose of this study was to compare bond performance of single-step adhesives to human dentin using micro-shear bond test. Methods: Dentin slices were prepared by grinding occlusal surface of extracted human third molars. Six commercially available adhesives and one experimental dual-cure type adhesive were used in this study; Absolute (Abs, Dentsply-Sankin), Adper Prompt L-Pop (APL, 3M ESPE), AQ Bond Plus (AQp, Sun Medical), DCB-100 (DC, Kuraray Medical Inc), G-bond (G, GC), Clearfil S3 BOND (S3, Kuraray Medical Inc) and XENO III (X III, Dentsply-Sankin). These adhesives were applied on the dentin surfaces according to manufactures' instruction. Resin composite (Clearfil AP-X, Kuraray Medical Inc) was then mounted and light-cured for 40s. After 24h immersion in water, micro-shear bond test was carried out at a crosshead speed of 1.0mm/min to assess micro-shear bond strength. The data was analyzed by one-way ANOVA and Bonferroni/Dunn's multiple comparison tests. Results: Micro-shear bond strengths (mean±SD in MPa). For each column, the same superscripts indicate no statistical differences (p>0.05).
|
Abs |
APL |
AQp |
DC |
G |
S3 |
X III |
|
40.0±5.6ab |
36.7± 6.7b |
45.5±5.8a |
41.3±5.2ab |
37.8±4.7b |
43.5±6.3ab |
40.2±6.4ab |